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    Wyświetlanie 1-38 z 38
    Tytuł:
    Study of the Variations in the Vertical and Horizontal Distribution of Heavy Sand Minerals in the Hilla River Sediments
    Autorzy:
    Hameed, Iman A.
    Rahman, Haleema Abdul Jabbar Abdul
    Anmar, Alsaadi
    Powiązania:
    https://bibliotekanauki.pl/articles/27323812.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    sediment
    heavy minerals
    specific gravity
    Opis:
    This study was conducted to investigate the effect of the Hilla River sediments on the heterogeneity of the distribution of heavy sand minerals for the fine and very fine sand classes as well as for the surface and subsurface layers. The results showed that the heavy sand minerals that were determined according to the specific gravity of each mineral and the specific gravity of the particles of minerals identified in the soils under study ranged between (2.5–4.5) and were divided into four groups in terms of the specific gravity. The first group included each of the minerals (Mica and Chlorite) of low specific gravity, while the second group contains (Pyroxene, Amphibole, Epidote Group). The third group includes minerals (Tourmaline and Garnet, Staurolite and Kyanite) and the two groups are classified as minerals of medium-specific gravity; in turn, the fourth group contains minerals of high specific gravity, namely (Zircon, Rutile and Opaques). As a result, the most important factors affecting the sedimentation, sorting and sedimentation processes are the conveyor’s speed, load capacity, the size of the separation particles and their specific gravity. The complete mismatch of the horizontal distribution of the minerals of one group is due to the varying ranges of the specific gravity of the minerals within the general range of specific gravity.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 7; 318--330
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy minerals in the key Late Pleistocene loess-palaeosol section at Kolodiiv (East Carpathian Foreland, Ukraine)
    Autorzy:
    Racinowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059497.pdf
    Data publikacji:
    2007
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Ukraine
    Late Pleistocene
    loess
    palaeosols
    heavy minerals
    Opis:
    Successions of loess and other deposits in the Kolodiiv profile, formed during the Eemian Inter glacial and Vistulian Glacial (OIS 5-2), are characterized using the results of heavy mineral analysis. Weathered local carbonate rocks and fluvial deposits (Wartanian Glacial, OIS 6) are used for comparison. It was found that the content of minerals derived from weathered and redeposited Carpathian Flysch increases from bottom to top of the profile. The entire loess succession accumulated under similar lithodynamic conditions and the palaeosols are of similar character.
    Źródło:
    Geological Quarterly; 2007, 51, 2; 185-188
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New data on heavy minerals from the Upper Cretaceous-Paleogene flysch of the Beskid Śląski Mts. (Polish Carpathians)
    Autorzy:
    Grzebyk, J.
    Leszczyński, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058926.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Polska
    Carpathians
    Paleogene
    Upper Cretaceous
    heavy minerals
    provenance
    Opis:
    The types, abundance and origin of non-opaque heavy minerals from17 samples of sandstones and granule conglomerates of the Godula Beds, Upper Istebna Sandstone, Ciężkowice and Cergowa Sandstone (Upper Cretaceous–Paleogene) of the Beskid Śląski Mts. are described in this study. The descriptions are based on standard optical petrographic investigations and on scanning electronmicroscope (including electron microprobe) analysis. Garnet, rutile, zircon and tourmaline are the most common types of heavyminerals. Monazite and apatite occur subordinately, whereas epidote and spinel are sporadic. The heavy minerals from the Middle and Upper Godula Beds and the Upper Istebna Sandstone indicate original derivation mainly from metamorphic rocks of granulite and partly eclogite facies. Metasediments were significant constituents, with subordinate granitoids and hornfelses. Granitoids and corresponding pegmatites and aplites, as well as metapelites and metapsammites, appear to be the primary crystalline parent rocks of the Lower Godula Beds and the Ciężkowice Sandstone. Garnet-mica schists with subordinate granitoids and their pegmatites are interpreted as the main crystalline parent rocks of the Cergowa Sandstone. Sporadic chromian spinels and chromian pyrope indicate derivation from mafic and ultramafic rocks. Co-occurrence of rounded and fresh unabraded grains (sometimes euhedral) suggests a mixed provenance for the clastic material, both from crystalline and older sedimentary rocks.
    Źródło:
    Geological Quarterly; 2006, 50, 2; 265-280
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Origin of fine-grained clastic sediments in caves of the Hoher Göll massif (the Northern Calcareous Alps, Austria)
    Autorzy:
    Kicińska, Ditta
    Powiązania:
    https://bibliotekanauki.pl/articles/2055866.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    cave sediments
    heavy minerals
    Augenstein Formation
    Northern Calcareous Alps
    Opis:
    The Hoher Göll Massif is situated 20 km south of Salzburg and belongs to the Northern Calcareous Alps (Austria). It is a ridge ca. 11 km long and 3 km wide with the highest summit Hoher Göll (2522 m a.s.l.), encircled by deeply incised valleys with bottoms ca. 2,000 m below it. Cave clastic deposits were studied in the Hochschartehöhlensystem, Dämchenhöhle and Hintere caves. The caves belong to the Giant Cave Level, with the exception of part of the Hochschartehöhlensystem, that is Der Sprechender Steine Cave, the highest parts of which belong to the Ruin Cave Level. The sources of the cave sediments have been identified from the composition of the heavy fractions. Preliminary studies of the Hoher Göll caves reveal that the cave fills were derived from the Oligocene to earliest Miocene Augenstein Formation, the deposits of the Palaeo-Inn River and the siliciclastic basal strata of the Northern Calcareous Alps. The clastic material deposited as the Augenstein Formation was transported from southern parts of the Eastern Alps and by the Palaeo-Inn river from their western part. According to heavy minerals, the sources of the clastic material were on the Palaeozoic terrains, the post-Palaeozoic sequence, and the Middle Austroalpine Unit. Later, during or after the mountain uplift, weathered materials from the Augenstein and Palaeo-Inn deposits were eroded and transported from the surface into caves by allogenic streams. Some of the sediments were likely to have been transported later to the Giant Cave Level from the southern part of the Northern Calcareous Alps.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2021, 91, 4; 363--373
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Texture and petrography of glacial deposits in the northern foothill of the Hruby Jesenik and Rychlebske Mts., Czechia
    Autorzy:
    Sikorova, J.
    Višek, J.
    Nyvlt, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059228.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    northern Moravia
    clast shape
    provenance
    glaciofluvial sediment
    heavy minerals
    Opis:
    The petrographic and mineralogical characteristics of glacial deposits from the localities in the northern foothills of the Hruby Jesenik and Rychlebske Mts. have been studied. Grain-size, petrographic composition, heavy minerals, clast shape and roundness have been investigated. The data obtained have been used to create a probability model to differentiate the stratigraphy of particular accumulations and for partial reconstruction of the advance direction of the ice sheet in the area. The main advance direction of the ice sheet was presumed to be from the NW to SE in this region. The erratic material was probably predominantly transported in the basal ice layers according to the clast shape and roundness. An Elsterian age of the sedimentary bodies investigated is suggested by correlation with analogous deposits in adjacent parts of Poland. This model contradicts previous correlations. However, further constraints on the stratigraphic position of these deposits would require the application of dating techniques.
    Źródło:
    Geological Quarterly; 2006, 50, 3; 345-352
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detrital garnets from the Upper Cretaceous-Palaeocene sandstones of the Polish part of the Magura Nappe and the Pieniny Klippen Belt: chemical constraints
    Detrytyczne granaty z górnokredowo-paleoceńskich piaskowców polskiej części płaszczowiny magurskiej i pienińskiego pasa skałkowego: wnioski uzyskane na podstawie ich składu chemicznego
    Autorzy:
    Salata, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/191641.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    heavy minerals
    garnets
    source rocks
    Magura Nappe
    Polish Carpathians
    Opis:
    Heavy mineral assemblages of the Upper Cretaceous-Palaeocene sandstones of the Polish part of the Magura Nappe and the Pieniny Klippen Belt (PKB) were studied. They consist mainly of stable minerals, such as zircon, tourmaline and rutile, but in many assemblages significant amounts of garnets are also present. To describe the provenance of the main heavy mineral groups their chemical composition was analysed. This article deals with the garnets group. Heavy minerals, including garnets, were derived to the Magura Basin from two opposite source areas: the north-west (northern) and the south-east. In the chemical composition of the analysed garnets, FeO and the almandine molecule are definitely dominant, but garnets with a raised MgO and pyrope molecule content were also found. Proportions among the main elements occurring in garnets indicate that they were formed under low- to medium grade metamorphic conditions in the southeastern source area, and medium- to high-grade conditions in the northern one.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2004, 74, No 3; 351-364
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy minerals from Oligocene sandstones of the Menilite Formation of the Skole Nappe, SE Poland : a tool for provenance specification
    Autorzy:
    Salata, D.
    Uchman, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060508.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    heavy minerals
    provenance
    Lower Oligocene
    Menilite Formation
    Skole Nappe
    Opis:
    Heavy minerals from sandstones belonging mostly to the Boryslav Sandstone and Kliva Sandstone members of the lower part of the Menilite Formation (Oligocene) in the northern part of the Skole Nappe, Polish Carpathians are characterized. In the study area, the sediments were deposited in the Rzeszów and Łańcut channel zones running from the northern margin of the basin. The most frequent heavy minerals in the sandstones examined include zircon, tourmaline, rutile, staurolite, kyanite and garnet. Single grains of andalusite, sillimanite, apatite, epidote, brookite and chrome spinel occur in some samples. The very small content of apatite is related to long, continental weathering in the source area, which is referred to the Paleozoic sedimentary cover of the Małopolska Block and the easternmost part of the Upper Silesian Block. Different preservation states, morphology, degree of roundness and colour varieties suggest that the heavy minerals studied derive from various petrographic types including metamorphic, igneous and sedimentary rocks. However, the Carboniferous and Permian conglomerates and sandstones seem to be the most probable source rocks.
    Źródło:
    Geological Quarterly; 2012, 56, 4; 803--820
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Paleocene and Eocene deposits on the eastern margin of the Gulf of Gdańsk (Yantarny P-1 borehole, Kaliningrad region, Russia)
    Autorzy:
    Kasiński, Jacek Robert
    Kramarska, Regina
    Słodkowska, Barbara
    Sivkov, Vadim
    Piwocki, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/2058549.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Paleogene
    depositional structures
    heavy minerals
    palynology
    Sambian Peninsula
    Russia
    Opis:
    Lithological and palynological studies of Paleogene siliciclastic deposits from the Yantarny P-1 borehole located on the western coast of the Sambian Peninsula (Kaliningrad region, Russia) show that the succession is characterized by numerous sedimentary discontinuities related to lithification horizons and erosional surfaces. Sedimentary gaps are emphasised by hardgrounds. Palynological data suggest the Selandian-Priabonian age of the succession and indicate a number of significant stratigraphic gaps. An important change in heavy mineral composition is recognized between the Paleocene and Eocene deposits in the area studied. A significant number of reworked Cretaceous microfossils is observed in the Selandian part of the succession studied.
    Źródło:
    Geological Quarterly; 2020, 64, 1; 29--53
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Provenance of Upper Cretaceous quartz-rich sandstones from the North Sudetic Synclinorium, SW Poland: constraints from detrital tourmaline
    Autorzy:
    Biernacka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058994.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    quartz arenites
    provenance
    heavy minerals
    tourmaline
    Sudetes
    Late Cretaceous
    inversion
    Opis:
    Upper Cretaceous quartz arenites that fill the North Sudetic Synclinorium on the northern periphery of the Variscan Bohemian Massif show high compositional but low textural maturity. They have been interpreted for years as derived largely from nearby granite plutons, i.e. as first-cycle sediments. A different provenance was revealed on the basis of a combined light and heavy mineral analysis, and particularly a detrital tourmaline study, given that tourmaline is a sensitive indicator of granitic/metamorphic/sedimentary (multi-recycling) origin. Cenomanian, Turonian, Coniacian and Santonian sandstones contain abundant angular tourmaline grains, together with zircon and rutile, and subordinately staurolite, garnet, anatase, kyanite, sillimanite and monazite. The successive – Cenomanian to Santonian – tourmaline populations are similar with regard to shape, colour and chemical composition. The latter points unambiguously to various metamorphic rocks with a predominant group of Al-rich metapelites (Al-rich, F-poor dravite). It is concluded that, in the Late Cretaceous, large Sudetic granite plutons such as the Karkonosze and Strzegom–Sobótka massifs were not exposed but were buried under a thick siliciclastic cover. These results coupled with published apatite fission-track data from the granitic Karkonosze Pluton and the gneissic/migmatitic Góry Sowie Massif reveal that Late Cretaceous quartz arenites of the North Sudetic Synclinorium reflect gradual exhumation of the surrounding massifs, but do not record the final exposure of crystalline rocks. Since the latest Turonian, this exhumation corresponded to the Late Cretaceous inversion episode in Central Europe. The textural immaturity of Upper Cretaceous sandstones is misleading in terms of their recycled origin, and it is inherited from immature clastic source rocks.
    Źródło:
    Geological Quarterly; 2012, 56, 2; 333-344
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Cyclops Mountains Massif (New Guinea, Indonesia) as the provenance area for metal-bearing shelf sediments from the Carolinian Sea
    Autorzy:
    Zglinicki, Karol
    Szamałek, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/2059672.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    continental shelf sediments
    Cyclops Mountains
    New Guinea
    heavy minerals
    geological prospection
    marine minerals
    Opis:
    In 2009, on the initiative of PT Halmahera Perkasa the “Jayapura” exploration project was carried out in Indonesia. As part of this project, exploration of the sea bottom in the northern coast of New Guinea was carried out over a distance of ~45 km. The suction dredge collected 59 samples of loose sediments from the shelf bottom surface of the Carolinian Sea (to a depth of 60 m below the sea-floor). The extracted samples are usually poorly and moderately sorted sands (5 samples), medium-grained sands (21 samples), and fine-grained sands (33 samples). The sand composition shows, among others, a wide spectrum of heavy minerals of ultra-mafic (Cr-garnet, chromium spinel, Mg-olivine) and metamorphic (epidote, clinochlore, amphibole, titanite) origin. The content of heavy minerals in the sediments is up to 54.77 wt.%. It was found that the source of heavy fraction in the eastern and western parts of the coast is the rock of the ophiolite series building the Cyclops Mountains Massif. The mineral composition of sediments from the central coastal zone corresponds to the types of rocks building the metamorphic core of the Cyclops Mountains (amphibolite, gneisses, andesite). Three mineral-geochemical subprovinces were determined on the basis of analyses of heavy mineral decomposition and chemical analyses of sediments. Shelf sediment from the eastern part of the coast is characterized by an increased content of strategic metals (Ni up to 3560, W up to 3130 and Co up to 142 ppm). In the central zone, the V content increases up to 244 ppm and the Ag content up to 5 ppm. In the shelf sediments there is a strong depletion in the REE.
    Źródło:
    Geological Quarterly; 2020, 64, 2; 480--491
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy minerals as detritus provenance indicators for the Jurassic pre-Callovian palaeokarst infill from the Czatkowice Quarry (Kraków–Wieluń Upland, Poland)
    Autorzy:
    Salata, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060576.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    heavy minerals
    paleokarst
    Lower Jurassic
    source rocks
    Czatkowice
    Kraków-Wieluń Upland
    Opis:
    Heavy mineral assemblages from the infill of Jurassic pre-Callovian palaeokarst in the Czatkowice Quarry, in the Kraków–Wieluń Upland, are zircon dominated. They contain also garnet, tourmaline, rutile and scarce grains of kyanite, staurolite and single chromian spinel. The textural features of the heavy minerals suggest that certain types of source rocks supplied the clastic material infilling in the karst studied. Most of the heavy minerals were derived from sedimentary or metasedimentary rocks as suggested by the high degree of roundness of the grains and also by high ZTR (zircon–tourmaline–rutile) index values. Rounded minerals may derive from Carboniferous, Permian and Triassic clastic rocks occurring in the area surrounding the Czatkowice Quarry. The chemical compositions of rounded detrital garnet and tourmaline grains suggest metamorphic and igneous rocks as initial sources, perhaps located in the Bohemian Massif. However, a hypothetical landmass located south of the Kraków–Wieluń Upland might have been an additional source area. The euhedral zircon and garnet grains were transported directly from crystalline rocks, which may have been Carboniferous-Permian volcanic rocks and crystalline basement elevations of Brunovistulicum exposed during Jurassic pre-Callovian sedimentation in the Czatkowice area.
    Źródło:
    Geological Quarterly; 2013, 57, 3; 537--550
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy minerals from sedimentary rocks of the Malcov Formation and their palaeogeographic implications for evolution of the Magura Basin (Western Carpathians, Slovakia) during the Late Eocene–Late Oligocene
    Autorzy:
    Bónová, K.
    Bóna, J.
    Kováčik, M.
    Laurinc, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059937.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Western Carpathians
    Magura Nappe
    Malcov Formation
    provenance
    heavy minerals
    mineral composition
    Opis:
    Detrital heavy minerals separated from the Malcov Fm. deposits (Magura Nappe) indicate their source rocks and areas. The heavy mineral assemblages predominantly consist of garnet, zircon, tourmaline, rutile and Cr-spinel. EPMA analyses reveal a few groups of garnets: zoned and unzoned Grs almandines, Prp-Sps almandines, unzoned Prp almandines, almandines, Sps almandines and rare zoned spessartine grains (~85 mol% Sps). The garnet composition indicates that gneisses, mica schists, amphibolites and granites were their main source rocks, but low-grade metapelites with Mn mineralisation probably contributed as well. The detrital dravitic tourmalines were mostly derived from paragneisses and mica schists. Cr-spinel indicates a volcanic source. Based on heavy mineral assemblages, coupled with palaeoflow analysis, we conclude that the Marmarosh Massif and Fore-Marmarosh Suture are the most probable source areas. Aditionally, the Malcov sedimentary basin was supplied by material from the crystalline complexes of the Tisza Mega-Unit and Pieniny Klippen Belt (PKB). The bulk of the clastic deposits comprise classical turbidites. These lithofacies were deposited from either turbidity currents or from concentrated density flows. The palaeoflow record is varied and highlights the contribution of sedimentary material from several directions and/or diversion of gravity currents from the main flow direction (SE–NW). The marginal parts of the Malcov sub-basins were formed of deformed and uplifted older formations of surrounding units of the Magura Nappe and PKB (submerged ridges). Older (Late Cretaceous to Eocene) flysch sediments may have been redeposited from these ridges to neighbouring sub-basins in a transverse direction (NE–SW).
    Źródło:
    Geological Quarterly; 2016, 60, 3; 675--694
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stratigraphy and sedimentology of the Bug loess (Pleistocene: Upper Vistulian) between Kiev and Odessa (Ukraine)
    Autorzy:
    Chlebowski, R.
    Gozhik, P.
    Lindner, L.
    Łanczont, M.
    Wojtanowicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058875.pdf
    Data publikacji:
    2003
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Ukraine
    Kiev–Odessa area
    alimentation areas
    heavy minerals
    last glaciation
    loess
    Opis:
    Documented type sections (Vyazivok, Stayky, Uman, Troitskoye, Altestovo, Roxolany and Lebedivka) provide a basis for Pleistocene stratigraphy between Kiev and Odessa, and have been used to characterise the heavy mineral composition and part of the light fraction of the Bug loess in this area. These sections document an almost complete succession of climatic change during the last 780 ka, worked out mostly using loesses and palaeosols though also in the case of the first two sections, of glacial deposits. The heavy mineral composition of the Bug loess in these sections documents five mineral groups on the basis of their resistance to weathering and susceptibility to deflation and aeolian transport. Radar charts with particular mineral groups indicate mineralogical and genetic trends in the loesses. Moreover, in some sections the light fraction of the loess investigated contains derived microfossils (mainly foraminifers) of Cretaceous age, indicating source areas for the loess-forming material, and constraining the palaeowind directions. The data obtained allow distinction of three accumulation zones of the Bug loess in this area, reflecting loesses derived from different source areas and transported by winds from different directions. In northern sections (zone A), the Bug loess was accumulated by winds blowing from the west and north-west. More to the south (zone C), the same loess was accumulated by winds from the east and south-east. Loess preserved in zone B, between these areas, could be accumulated by winds from either of these directions.
    Źródło:
    Geological Quarterly; 2003, 47, 3; 261-268
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selective agglutination of tourmaline grains by foraminifera in deep-water flysch environment (Eocene Hieroglyphic beds, Silesian Nappe, Polish Outer Carpathians)
    Autorzy:
    Waśkowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059729.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    heavy minerals
    tourmaline
    agglutinated foraminifera
    deep-marine flysch environment
    Outer Carpathians
    Opis:
    Detrital fragments of automorphic tourmaline crystals are commonly incorporated in tests of simple agglutinated foraminifera that lived in the deep-marine Carpathian turbidite basin, in which deposition of the Hieroglyphic beds (Eocene) took place. Such grains were observed in the tests of 37 taxa representing 20 species. However tourmaline occurs in the Carpathian Flysch sediments as an accessory mineral, still it was selected by the foraminifera as the only heavy mineral to be incorporated in their tests. The proportion of tourmaline-bearing specimens in an assemblage usually amounts to a few percent, but may reach 29% in extreme cases. The particular preference for tourmaline segregation and incorporation in the test walls is shown by the following genera: Psammosiphonella, Reophax, Bathysiphon and Nothia.
    Źródło:
    Geological Quarterly; 2014, 58, 2; 337--352
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conventional and high-resolution heavy mineral analyses applied to flysch deposits : comparative provenance studies of the Ropianka (Upper Cretaceous–Paleocene) and Menilite (Oligocene) formations (Skole Nappe, Polish Carpathians)
    Autorzy:
    Salata, D.
    Uchman, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060326.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    heavy minerals
    high-resolution
    correlation
    sedimentary provenance
    flysch
    Outer Carpathians
    Skole Nappe
    Opis:
    Conventional and high-resolution analyses of heavy minerals from the gravity flow-deposited sandstones of the Campanian–Maastrichtian interval of the Ropianka (Upper Cretaceous–Paleocene) and Menilite (Oligocene) formations of the Polish Carpathians display similar compositions in terms of mineral species. Zircon, tourmaline, rutile, garnet, staurolite and kyanite belong to the main constituents in both formations. Apatite is common in the Ropianka Fm., while the Menilite Fm. almost lacks this mineral. Furthermore, individual hornblende grains were found in the Ropianka Fm., while andalusite is present only in the Menilite Fm. The Ropianka Fm. is relatively richer in zircon, tourmaline, garnet and apatite, while the Menilite Fm. contains more staurolite and kyanite. Zircon and tourmaline colour and morphological varieties are similar in both formations. The similarities of the heavy mineral assemblages studied suggest origin of these minerals from lithologically similar rocks. Negative correlations between the zircon + tourmaline + rutile (ZTR) values and the content of garnet and staurolite in the Ropianka Fm. may indicate, to a large extent, first-cycle delivery of garnet and staurolite to the formation. Negative, but low, correlation valid only for ZTR and garnet and positive correlations for ZTR and staurolite and kyanite in the Menilite Fm. suggest delivery of these minerals from sedimentary rocks or/and palimpsest sediments. The data obtained on mineral relationships and their morphology suggest mixed first-cycle and recycled provenance of the heavy minerals studied. Additionally, the first-cycle material input seems to be larger during the Ropianka Fm. sedimentation, while during the deposition of Menilite Fm. the contribution of material delivered from erosion of recycled sediments appears more prominent. The heavy mineral evidence suggests a change at the northern margin of the Skole Basin from an immature passive margin with a high relief during sedimentation of the Campanian–Maastrichtian part of the Ropianka Fm. to a mature passive margin with a low relief during sedimentation of the Menilite Fm.
    Źródło:
    Geological Quarterly; 2013, 57, 4; 649--664
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of the Bystrej Valley caves (Tatra Mts, Poland) based on corrosive forms, clastic deposits and U-series speleothem dating
    Autorzy:
    Kicińska, D.
    Hercman, H.
    Najdek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/191650.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    cave evolution
    scallops
    heavy minerals
    U-series speleothem dating
    palaeohydrology
    Tatra Mts.
    Opis:
    The origin and age of cave deposits, as well as palaeogeographical changes in the Bystrej catchment during the last ca. 250 ka, were reconstructed in Magurska, Kasprowa Niżnia, Goryczkowa, Kalacka and Bystrej caves (the Bystrej Valley). The reconstruction is based on the study of corrosive forms, heavy mineral analyses and U-series dating of speleothems. Two generations of palaeoflows were distinguished by observations of scallops and heavy mineral analyses. In the older stage, now abandoned caves drained massifs surrounding the Bystrej Valley and part of an adjacent valley. The direction of palaeoflow changed as a result of the water capture after Kasprowa Niżnia Cave came into being. In the later stages, the evolution of cave systems was controlled by glaciation-deglaciation cycles. Probably at this time, some caves located in the lowest parts of the massifs also started to be formed. U-series speleothem dating allows the determination of five phases of speleothem deposition: ca. 220–150 ka, ca. 135–105 ka, ca. 95–70 ka, ca. 40–23 ka and during the Holocene.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2017, 87, 1; 101-119
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy-mineral, mineral-chemical and zircon-age constraints on the provenance of Triassic sandstones from the Devon coast, southern Britain
    Autorzy:
    Morton, Andrew
    Hounslow, Mark W.
    Frei, Dirk
    Powiązania:
    https://bibliotekanauki.pl/articles/94463.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    heavy minerals
    zircon
    provenance
    Triassic
    Devon
    ciężkie minerały
    cyrkon
    proweniencja
    Trias
    Dewon
    Opis:
    An integrated heavy-mineral, mineral-chemical and zircon-dating study of the Triassic succession exposed on the south Devon coast, in the western part of the Wessex Basin, indicates derivation from a combination of granitic and metasedimentary lithologies of ages of mostly over 550 Ma. These sources were probably located at a relatively proximal location near the southern margin of the basin. Derivation from more distal sources in the Armorican Massif or local Variscan sources to the west appears unlikely in view of the scarcity of Permo-Carboniferous (Variscan-age) zircons. The Budleigh Salterton Pebble Bed Formation was derived from a different combination of source lithologies than the Otter Sandstone Formation, the former including staurolite-grade metasediments that were absent in the catchment area of the Otter Sandstone. The Devon coast succession has provenance characteristics that differ from equivalent sandstones further east in the Wessex Basin, and from sandstones in the East Irish Sea Basin to the north. These differences indicate that sediment supply patterns to the linked Triassic basin systems in southern Britain are complex, involving multiple distinct sub-catchment areas, and that heavy-mineral studies have considerable potential for unravelling these sub-catchment area sources.
    Źródło:
    Geologos; 2013, 19, No. 1-2; 67-85
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Skład minerałów ciężkich w osadach podłoża czwartorzędu północno-zachodniej Polski
    Heavy minerals composition of sediments underlying the Quaternary in the northwestern Poland
    Autorzy:
    Masłowska, M.
    Michałowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2063399.pdf
    Data publikacji:
    2004
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    litostratygrafia
    minerały ciężkie
    osady podłoża czwartorzędu
    heavy minerals
    lithostratigraphy
    sediments underlying the Quaternary
    Opis:
    Praca przedstawia wyniki badań osadów podłoża czwartorzędu w rejonie Polski północno-zachodniej. W podłożu czwartorzędu badanego obszaru występują osady mezozoiczne (jury i kredy) oraz trzeciorzędowe (oligocenu i miocenu). Utwory te wykazują zróżnicowanie facjalne i litologiczne, co potwierdziły wyniki badań składu ziarnowego, zawartości CaCO3 oraz składu minerałów ciężkich. Badane osady podłoża przy różnym rodzaju uziarnienia zawierają bardzo mało lub nie zawierają CaCO3 oraz posiadają indywidualne zespoły minerałów ciężkich, charakterystyczne dla różnych jednostek stratygraficznych. Generalnie osady podłoża czwartorzędu badanego obszaru Polski północno-zachodniej wykazują odrębność mineralogiczną w stosunku do innych obszarów Polski północnej i środkowej, co również potwierdzają wyniki analizy statystycznej.
    The paper presents results of investigations of sediments underlying the Quaternary in northwestern Poland. Sediments of Jurassic, Cretaceous and Tertiary (Oligocene and Miocene) occur under the Quaternary of this area. Lithofacial differentiation of sediments was determined on the basis of grain size data, CaCO3 content and heavy minerals composition. Granulometrical composition of samples is heterogenous. Despite of that all sediments have very low contents of CaCO3 and heavy minerals composition - characteristic for different stratigraphical units. Generally, the heavy minerals associations of sediments underlying of the Quaternary in northwestern Poland are different in relation to other northern and middle regions of Poland. The difference of heavy minerals composition in sediments in various stratigraphic units is also noticed in results of statistic analysis of received data.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2004, 407; 89-111
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minerały ciężkie w profilu utworów miocenu w otworze wiertniczym Kazimierza Wielka (Donosy) PIG-1 (północny skraj zapadliska przedkarpackiego)
    Heavy minerals in the Miocene deposits from the Kazimierza Wielka (Donosy) PIG-1 borehole (northern margin of the Carpathian Foredeep)
    Autorzy:
    Kramarska, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2061969.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    minerały ciężkie
    formacja z Machowa
    zapadlisko przedkarpackie
    heavy minerals
    Machów Formation
    Carpathian Foredeep
    Opis:
    W artykule przedstawiono wyniki badań uziarnienia i składu minerałów ciężkich w sześciu próbkach utworów środkowego miocenu (formacja z Machowa) z otworu wiertniczego Kazimierza Wielka (Donosy) PIG-1. Wyróżniona asocjacja granatów z cyrkonem, turmalinem, staurolitem i biotytem wskazuje na flisz karpacki jako najbardziej prawdopodobne źródło pochodzenia minerałów detrytycznych badanej formacji.
    The paper presents the results of grain size and mineral content studies of six samples taken from Middle Miocene deposits (Machów Formation) in the Kazimierza Wielka (Donosy) PIG-1 borehole. The distinguished garnet association with zirconium, tourmaline, staurolite, and biotite suggests the Carpathian Flysch Belt as the most possible source area of the detrital minerals in the formation.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2015, 461; 53--59
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charakterystyka jakościowo-ilościowa czarnych osadów z przedpola eksploatacji kopalni Osiecznica (Dolny Śląsk)
    Characteristics of quality and quantity of black sediments from the foreground of the mining operations Osiecznica (Lower Silesia, Poland)
    Autorzy:
    Muszer, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/169639.pdf
    Data publikacji:
    2013
    Wydawca:
    Poltegor-Instytut Instytut Górnictwa Odkrywkowego
    Tematy:
    piaski szklarskie
    minerały ciężkie
    glass sand
    heavy minerals
    gravity concentration
    deposit of glass sand
    Opis:
    W pracy scharakteryzowano czarny osad obecny w złożu wysoko wysortowanych piasków szklarskich z Osiecznicy. Czarny osad występujący na przedpolu eksploatacji w kopalni Osiecznica jest ekwiwalentem piasków szklarskich. W badanych koncentratach występują głównie tlenki tytanu (rutyl, anataz), cyrkon, śladowe ilości magnetytu z hematytem, tlenki i wodorotlenki manganu (psylomelan, piroluzyt) oraz materiał organiczny. Zawartość minerałów ciężkich w czarnym osadzie wynosi 2,87 % obj. Piaski szklarskie są silnie zanieczyszczone materią organiczną. Barwa czarna (brunatno-czarna) związana jest z obecności w szczelinach i pęknięciach w ziarnach kwarcu związków żelaza (hematytu), manganu (psylomelan, piroluzyt) oraz materiału organicznego.
    The composition of the black sediment from the glass sand in Osiecznica (Lower Silesia, SW Poland) was described. The Black sediment that occurs in the foreland of the mine operation is equivalent to Osiecznica glass sand. The studied concentrates consist mainly of titanium oxides (rutile, anatase), zirconium, small quantity of magnetite with hematite, manganese oxides and hydroxides (psylomelan, pyrolusite) and the organic material. The content of heavy minerals in the black sediment is 2.87% by volume. Glass sands are heavily contaminated with organic material. The black color (brownish-black) is related to the presence of perforation and cracks in the quartz of iron (hematite), manganese (psylomelan, pyrolusite) and organic material.
    Źródło:
    Górnictwo Odkrywkowe; 2013, 54, 5-6; 233-239
    0043-2075
    Pojawia się w:
    Górnictwo Odkrywkowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The sedimentary environment of Devonian siliciclastics in the Babí lom locality (Brunovistulian Platform cover, Southern Moravia, Czech Republic)
    Autorzy:
    Wojewoda, J.
    Nehyba, S.
    Gilíkova, H.
    Burianek, D
    Powiązania:
    https://bibliotekanauki.pl/articles/2059824.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    southern Moravia
    Brno Massif
    Devonian siliciclastics
    facies analysis
    heavy minerals
    alluvial fan
    braided river
    meandering river
    palaeotransport
    Opis:
    Sandstones and conglomerates, which northwards of Brno agglomeration build a hill (ridge) named Babí lom are strongly diagenezed (anchi-metamorphozed) and tectonically deformed. Their regional distribution and stratigraphic position between the Cambrian(?) clastics and Upper Devonian limestones, as well as their appearance meant that they age is considering as Middle Devonian. They are distinguished as the so-called „Basal Devonian Clastics“. Almost all primary sedimentary features are well preserved and distinct. In the metasediments of the Babí lom hill were distinguished both the facies and structures typical of alluvial fans and rivers. Among others they are channel lags with imbricated grains, cross beddings and debrites. Within sedimentary association was established the way-up direction what clearly evidences a coarsening upwards sequence. Assuming the lack of rotation of series of sediments in the X-Y plane, the palaeotrasport was toward the north while major supply with material was from the east.
    Źródło:
    Geological Quarterly; 2015, 59, 1; 229--238
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mysterious high-pyrope detritic garnets in the Middle Jurassic clastics of the Cracow region
    Zagadkowy, wysokopiropowy detrytyczny granat w środkowojurajskich utworach klastycznych regionu krakowskiego
    Autorzy:
    Aubrecht, R.
    Meres, S.
    Gradziński, M.
    Sykora, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/183948.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    minerały ciężkie
    jura
    monoklina śląsko-krakowska
    analiza proweniencji
    granat
    heavy minerals
    Jurassic
    Polish platform
    provenance analysis
    garnet
    Opis:
    W celu rozpoznania składu minerałów ciężkich środkowojurajskich piasków i piaskowców, analizie poddano utwory tego wieku z kilku odsłonięć okolic Krakowa (Dębnik, Dębnik-Czatkowice, Racławice, Paczółtowice). Wykazano w ich obrębie wysoki udział minerałów z grupy granatu, wskazując na duże podobieństwo do minerałów tego typu znanych z zewnętrznych Karpat Zachodnich. Tym niemniej bezpośrednie wskazanie obszaru źródłowego tych minerałów nie jest możliwe, a stwierdzić można jedynie, że ten enigmatyczny region obfitował w granulity, eklogity i perydotyty.
    Źródło:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2009, 35, 3/1; 9-15
    0138-0974
    Pojawia się w:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors controlling sedimentation in the Toruń-Eberswalde ice-marginal valley during the Pomeranian phase of the Weichselian glaciation: an overview
    Autorzy:
    Pisarska-Jamroży, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/94659.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    sedimentology
    depositional mechanisms
    palaeohydraulics
    heavy minerals
    sandur
    Pleistocene
    Polska
    sedymentologia
    mechanizmy depozycyjne
    paleohydraulika
    minerały ciężkie
    sandr
    plejstocen
    Polska
    Opis:
    During the Pleistocene the Scandinavian ice sheet drained huge quantities of sediment-laden meltwaters. These meltwaters supplied ice-marginal valleys that formed parallel to the front of the ice sheet. Not without significance was the supply of ice-marginal valleys from extraglacial rivers in the south. Moreover, periglacial conditions during and after sedimentation in ice-marginal valleys, the morphology of valley bedrocks, and erosion of older sediments played important roles in the depositional scenarios, and in the mineralogical composition of the sediments. The mechanisms that controlled the supply and deposition in ice-marginal valleys were analysed on the basis of a Pleistocene ice-marginal valley that was supplied by northern and southern source areas in the immediate vicinity. Investigations were conducted in one of the largest ice-marginal valleys of the Polish-German lowlands, i.e., the Toruń-Eberswalde ice-marginal valley, in sandurs (Drawa and Gwda) supplied sediments and waters from the north into this valley, and on extraglacial river terraces (pre-Noteć and pre-Warta rivers), formed simultaneously with the sandurs and ice-marginal valley (Pomeranian phase of Weichselian glaciation) supplied sediments and waters from the south into this valley. A much debated question is how similar, or different, depositional processes and sediments were that contributed to the formation of the Toruń-Eberswalde ice-marginal valley, and whether or not it is possible to differentiate mostly rapidly aggraded sandur sediments from ice-marginal valley sediments. Another question addresses the contribution of extraglacial feeding of the Toruń-Eberswalde ice-marginal valley. These matters were addressed by a wide range of analyses: sediment texture and structure, architectural elements of sediments, frequency of sedimentary successions, heavy-mineral analysis (both transparent and opaque heavy minerals), analysis of rounding and frosting of quartz grains, and palaeohydrological calculations. Additionally, a statistical analysis was used. The specific depositional conditions of distribution of sediments in ice-marginal valley allow to distinguish new environment of ice-marginal valley braided river. The spectrum of depositional conditions in the Toruń-Eberswalde ice-marginal valley and their specific palaeohydraulic parameters allow to distinguish three coexisting zones in the ice-marginal valley braided-river system: (1) deep gravel-bed braided channel zone with extensive scours, (2) deep sand-bed braided channel zone with transverse bars, and (3) marginal sand-bed and gravel-bed braided channel zone with diamicton and breccia deposition, which were characterised in detail. Some of the results have been published previously, which is why they are discussed in the present paper within the context of new data.
    Źródło:
    Geologos; 2015, 21, 1; 1-29
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fasetowane ziarna granatów z pstrego piaskowca monokliny przedsudeckiej okolicy Głogowa (SW Polska)
    Faceted garnets from the sandstones of the Buntsandstein on the Fore-Sudetic Monocline (Głogów area, SW Poland)
    Autorzy:
    Muszyński, M.
    Gaweł, A.
    Skowroński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/183341.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    fasetowane granaty
    minerały ciężkie
    pstry piaskowiec
    monoklina przedsudecka
    Polska
    faced garnets
    heavy minerals
    Buntsandstein
    Fore Sudetic Monocline
    Polska
    Opis:
    Przeprowadzono badania (mikroskopia optyczna, SEM/EDS, XRD, IR) tzw. fasetowanych ziarn granatów, napotkanych we frakcjach minerałów ciężkich wydzielonych z piaskowców pstrego piaskowca monokliny przedsudeckiej. Stwierdzono, że reprezentują one człony szeregu almandyn-pirop o przewadze cząsteczki almandynowej i zawierają na ogół podrzędną domieszkę cząsteczki grossularowej, natomiast pozbawione są spessartynowej. Obszarem alimentacyjnym dla tych minerałów były zapewne Sudety, gdzie w obecnie odsłoniętych skałach metamorficznych facji eklogitowej i granulitowej stwierdzono granaty o zbliżonym chemizmie. Przyjęto, zgodnie z przeważającymi aktualnie poglądami, że "fasetowane" ziarna granatów (współwystępujące z obtoczonymi ziarnami cyrkonu, turmalinu, rutylu, apatytu, a nawet blaszkami mik), ukształtowały się w wyniku diagenetycznego wyługowania przez roztwory porowe. Proces ten przebiegał przypuszczalnie powoli, w alkalicznym lub ewentualnie obojętnym środowisku (świadectwem obecność niewyługowanego apatytu oraz dominacja smektytów w spoiwie piaskowców), w warunkach bliskich chemicznej równowagi między granatami a roztworami porowymi.
    The authors studied (optical microscopy, SEM/EDS, XRD, IR) the so-called faceted garnets found in heavy mineral fractions, separated out from the sandstones of the Buntsandstein on the Fore-Sudetic Monocline. The garnets represent almandine members of the almandine-pyrope series (almandine prevails over pyrope) and usually contain a subordinate admixture of the grossular member, whereas are devoid of the spessartine member. An alimentation area of these minerals was probably situated in the Sudetes, where garnets with a similar composition occur in some exposed rocks of the eclogite and granulite facies. The authors agree with currently prevailing opinions that the faceted garnets (co-occurring with rounded grains of zircon, tourmaline, rutile, apatite, and even mica flakes) were formed due to their selective diagenetic leaching by porous solutions. The process must have proceeded slowly in an alkaline or, possibly, neutral environment (it is proved by the presence of unleached apatite and domination of smectites in the bounding mass of the sandstones), under conditions approaching chemical equilibrium between garnets and the porous solutions.
    Źródło:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2007, 33, 1; 51-68
    0138-0974
    Pojawia się w:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hazardous radioactivity levels and heavy mineral concentrations in beach sediments of Lake Peipsi, northeastern Estonia
    Autorzy:
    Järvelill, J.-I.
    Koch, R.
    Raukas, A.
    Vaasma, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/94516.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    elevated radioactivity
    risk management
    beach sediments
    heavy minerals
    Baltic States
    podwyższona radioaktywność
    zarządzanie ryzykiem
    osady plażowe
    minerały ciężkie
    kraje nadbałtyckie
    Opis:
    The present study discusses results of heavy mineral analyses and radioactivity of beach sediments of Lake Peipsi. Such analyses are commonly done globally, but had not yet been conducted for the fourth largest lake in Europe. The average heavy mineral content in Lake Peipsi beach sediments along the northern and western coast is higher than usual for Estonian coastal and Quaternary sediments. Concomitantly, elevated radioactivity levels have been measured in several places, with the highest concentrations observed at Alajõe (1885.5 Bq/kg), which is over five times more than the recommended limit. The aim of the present study is to find sites with higher radioactivity levels, because the northern coast of Lake Peipsi is a well-known recreational area.
    Źródło:
    Geologos; 2018, 24, 1; 1-12
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Osady złotonośne doliny potoku Kraszówka (Pogórze Kaczawskie)
    Gold-bearing deposits of the Kraszówka Stream (Kaczawskie Foothills)
    Autorzy:
    Urbański, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2063135.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    złoto okruchowe
    minerały ciężkie
    osady aluwialne
    skały macierzyste
    Sudety Zachodnie
    placer gold
    heavy minerals
    alluvial deposits
    parental rocks
    Western Sudetes
    Polska
    Opis:
    Analiza petrograficzna i mineralogiczna 25 panwiowych próbek korytowych umożliwiła rozpoznanie złotonośności holoceńskich aluwiów potoku Kraszówka na Pogórzu Kaczawskim. Wystąpienia złota okruchowego odnotowano w 18 próbkach pobranych na całej długości potoku, jednak jego największe nagromadzenie stwierdzono w środkowym odcinku potoku. Większość znalezionych złocin ma formę blaszkowo-płytkową lub cementacyjno-grudkową i wykazuje różnorodne deformacje mechaniczne. Głównym Źródłem złota okruchowego w osadach korytowych potoku Kraszówka są najprawdopodobniej paleogeńskie „białe” żwiry kwarcowe oraz wodnolodowcowe piaski złotonośne związane ze zlodowaceniami południowopolskimi. Ważną rolę w genezie złota okruchowego odegrały procesy chemicznego rozpuszczania i wtórnej precypitacji złota, prowadzące do powstawania tzw. złota „nowego”. W świetle teorii o odnawialności rozsypisk złotonośnych, istnieją duże szanse na rozpoznanie w osadach aluwialnych doliny Kraszówki stref o bilansowej zawartości złota okruchowego.
    Samples from alluvia of the Kraszówka Stream (Kaczawskie Foothills) were subjected to petrographic analysis. After this research, gold-bearing deposits of the Holocene Kraszówka alluvia have been diagnosed. Gold occurrence was reported all along the Kraszówka Stream, but its large concentration has been localized by the author within the middle part of the stream. Gold has been identified within 18 of 25 samples collected. Most of gold grains take the foliate-plate and cementation-popular forms and show various types of mechanical deformation. Palaeogene “white” quartz gravels and gold-bearing glaciofluvial sands of the South Polish Glaciations are probably the main source of placer gold. Chemical processes of gold dissolving and reprecipitation took an important part in the origin of placer gold, leading to the formation of so-called “new” gold. In the light of gold-placer renewable theory, there is a good chance to identify zones of economic placer gold concentration in alluvia of the Kraszówka Valley.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2010, 439 (2); 375--388
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of Early Pleistocene fluvial systems in central Poland prior to the first ice sheet advance – a case study from the Bełchatów lignite mine
    Autorzy:
    Goździk, J.
    Zieliński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/94398.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Quaternary
    preglacial
    fluvial-aeolian interaction
    heavy minerals
    quartz grain morphology
    sedimentology
    palaeoclimate
    Czwartorzęd
    preglacjał
    minerały ciężkie
    morfologia ziarna kwarcu
    sedymentologia
    paleoklimat
    Opis:
    Deposits formed between the Neogene/Pleistocene transition and into the Early Pleistocene have been studied, mainly on the basis of drillings and at rare, small outcrops in the lowland part of Polish territory. At the Bełchatów lignite mine (Kleszczów Graben, central Poland), one of the largest opencast pits in Europe, strata of this age have long been exposed in extensive outcrops. The present paper is based on our field studies and laboratory analyses, as well as on research data presented by other authors. For that reason, it can be seen as an overview of current knowledge of lowermost Pleistocene deposits at Bełchatów, where exploitation of the Quaternary overburden has just been completed. The results of cartographic work, sedimentological, mineralogical and palynological analyses as well as assessment of sand grain morphology have been considered. All of these studies have allowed the distinction of three Lower Pleistocene series, i.e., the Łękińsko, Faustynów and Krzaki series. These were laid down in fluvial environments between the end of the Pliocene up to the advance of the first Scandinavian ice sheet on central Poland. The following environmental features have been interpreted: phases of river incision and aggradation, changes of river channel patterns, source sediments for alluvia, rates of aeolian supply to rivers and roles of fluvial systems in morphological and geological development of the area. The two older series studied, i.e., Łękińsko and Faustynów, share common characteristics. They were formed by sinuous rivers in boreal forest and open forest environments. The Neogene substratum was the source of the alluvium. The younger series (Krzaki) formed mainly in a braided river setting, under conditions of progressive climatic cooling. Over time, a gradual increase of aeolian supply to the fluvial system can be noted; initially, silt and sand were laid down, followed by sand only during cold desert conditions. These fluvio-periglacial conditions are identified in the foreground of the advance of the oldest ice sheet into this part of central Poland. The series studied have been compared with other fluvial successions which accumulated in the Kleszczów Graben during subsequent glaciations so as to document general changes in fluvial systems as reactions to climatic evolution. Thus, a palaeoenvironmental scenario has emerged which could be considered to be characteristic of central Poland during the Early Pleistocene.
    Źródło:
    Geologos; 2017, 23, 2; 89-107
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy minerals as a tool to reconstruct river activity during the Weichselian glaciation (Toruń Basin, Poland)
    Autorzy:
    Weckwerth, Piotr
    Chabowski, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/94678.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    heavy minerals
    ice-marginal valley
    river-discharge regime
    channel-pattern transformation
    Toruń Basin
    Weichselian
    ciężkie minerały
    pradolina
    dorzecze Torunia
    zlodowacenie północnopolskie
    Opis:
    The heavy-mineral composition of the Weichselian fluvial successions deposited by an ephemeral meandering river and by a sand-bed braided river in the Toruń Basin (central Poland) was analysed. On the basis of a lithofacies analysis, in combination with the composition of the heavy-mineral assemblages, the fluvial processes and river-channel morphology were reconstructed. This allows determining the provenance of the fluvial deposits and the rivers’ discharge regimes. A model is proposed which can explain the changes in the amount of individual minerals in the fluvial sediments of different ages under the conditions of the oscillating Scandinavian ice sheet. The model assumes that, during the ice-sheet advances, the proglacial streams supplied large amounts of heavy minerals that were less resistant to mechanical abrasion. During the main phase of the ice-sheet retreat, the distance between the ice sheet and the Toruń Basin increased, and the amount of non-resistant minerals diminished as a result of sediment reworking in proglacial rivers. Due to the unique location of the Toruń Basin at the front of the Scandinavian ice sheet during the Weichselian glaciation, the heavy-mineral assemblages in the fluvial deposits form a valuable tool for the recognition of the ice-sheet extent.
    Źródło:
    Geologos; 2013, 19, No. 1-2; 25-46
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Depositional conditions of the Upper Younger Loess during the Last Glacial Maximum in central and eastern Europe
    Autorzy:
    Dzierżek, Jan
    Lindner, Leszek
    Chlebowski, Roman
    Szymanek, Marcin
    Bogucki, Andriy
    Tomeniuk, Olena
    Powiązania:
    https://bibliotekanauki.pl/articles/24024703.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    North European Loess Belt
    Vistulian glaciation
    aeolian processes
    palaeowind circulation
    heavy minerals
    północnoeuropejski pas lessowy
    zlodowacenie Wisły
    procesy eoliczne
    minerały ciężkie
    Opis:
    This paper is a summary of the results of research on the accumulation conditions of the Upper Younger Loess (LMg) in Poland and Bug loess (bg) in Ukraine from the maximum stage (MIS 2) of the Vistulian (Weichselian) Glaciation in central and eastern Europe. These studies included an analysis of the morphological (topographic) situation of the loess cover, its grain size and heavy mineral composition, the preserved structures of loess sedimentation as well as mollusc and pollen analyses of this loess. They revealed that the accumulation of Upper Younger Loess (UYL) might have been more dependent on the prevailing moisture conditions than previously thought. These conditions could have been caused by cold air masses from an ice sheet and warm air masses from the Mediterranean Sea and Atlantic coming together in the Carpathians and the Holy Cross Mountains and favouring the formation of dust storms and precipitation. In this process, a loading of loess dust (formed from local rocks weathering in periglacial conditions) by atmospheric moisture particles was especially significant. The moist substrate not only favoured the periodic development of vegetation and molluscs but also enabled the interception of dust and the accumulation of an increasingly thick loess cover. Westerly and south-westerly winds predominated in the UYL as indicated by the topographic position of loess patches and the mineral composition of the studied loess. Periodically an increased air circulation from the east and northeast occurred.
    Źródło:
    Acta Geologica Polonica; 2022, 72, 4; 369--389
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Węglanowość, obtoczenie ziaren i minerały ciężkie w formacjach paleogenu i neogenu środkowozachodniej Polski
    Carbonate content, grain roundness and heavy minerals in Paleogene and Neogene formations of Middle West Poland
    Autorzy:
    Romanek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2062795.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    węglanowość
    obtoczenie ziaren
    minerały ciężkie
    litostratygrafia
    paleogen
    neogen
    środkowozachodnia Polska
    carbonate content
    grain roundness
    heavy minerals
    lithostratigraphy
    Paleogene
    Neogene
    Middle West Poland
    Opis:
    W 40 próbkach pochodzących z czterech formacji paleogeńskich (oligocen) i czterech formacji neogeńskich (miocen) zbadano standardowymi badaniami litopetrograficznymi węglanowość, obtoczenie materiału ziarnistego i skład minerałów ciężkich. Cechy te dobrze charakteryzują analizowane osady i mogą służyć do określania ich pozycji litostratygraficznej. Ma to szczególne znaczenie w badaniach stratygraficznych krótkich odcinków rdzeni wiertniczych, które są głównym materiałem badawczym analizowanych osadów na Niżu Polskim. Formacje morskie oligocenu charakteryzuje podwyższona węglanowość i średnie obtoczenie materiału ziarnistego. Formacje te różnicuje skład minerałów ciężkich. Formacje lądowe oligocenu i miocenu odznaczają się niską węglanowością, na ogół złym stopniem obtoczenia ziaren i znaczną wewnętrzną odmiennością składu i udziału minerałów ciężkich.
    The most indicative qualities of four Paleogene formations (Oligocene) and four Neogene formations (Miocene), 40 samples of which have been the subject of the standard lithopetrographic analysis, prove to be carbonate content, grain roundness and composition of heavy minerals. Consequently, on the basis of these features, the lithostratigraphic position of the sediments may be determined, which is of high importance for stratigraphic examinations of short drill core intervals remaining the main research material of the analyzed deposits of the Polish Lowland. Oligocene marine formations are characterized by high carbonate content, medium grain roundness and varying composition of heavy minerals. As far as Oligocene and Miocene continental formations are concerned, low carbonate content and generally angular grains as well as significant differences in the heavy minerals’ composition and percentage may be observed.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2010, 438; 123--135
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minerały ciężkie w strefie kontaktu mezozoik/kenozoik w złożu węgla brunatnego Bełchatów
    Heavy minerals in the Bełchatów lignite deposit from the Mesozoic/Cenozoic contact zone
    Autorzy:
    Pękala, A.
    Hycnar, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2063035.pdf
    Data publikacji:
    2011
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    minerały ciężkie
    osady wietrzeniowe
    strefa kontaktu mezozoik/kenozoik
    złoże węgla brunatnego "Bełchatów"
    heavy minerals
    wheathering sediments
    Mesozoic/Cenozoic contact zone
    Bełchatów lignite deposit
    Opis:
    W artykule przedstawiono wyniki badań mineralogicznych minerałów ciężkich obecnych w skałach strefy kontaktu mezozoik/kenozoik w złożu węgla brunatnego Bełchatów. Na podstawie badań mikroskopowych stwierdzono występowanie takich minerałów ciężkich, jak: dysten, staurolit, cyrkon, turmalin, tlenkowe minerały tytanu, monacyt oraz piryt i galena. Analiza ilościowa wykazała, że spośród minerałów ciężkich nieprzezroczystych dominują dysten oraz turmalin.
    The paper presents the results of mineralogical studies of heavy minerals in the Bełchatów lignite deposit from the Mesozoic/Cenozoic contact zone, based on microscopic investigations. The rocks contain disthene, staurolite, zircon, tourmaline, titanium oxide minerals, monazite, pyrite and galena. Quantitative analysis shows that disthene and tourmaline are predominant among opaque heavy minerals.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2011, 444; 171--175
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rare earth elements pilot studies of the baltic marine sands enriched in heavy minerals
    Pilotażowe badania pierwiastków ziem rzadkich w piaskach morskich Bałtyku wzbogaconych w minerały ciężkie
    Autorzy:
    Mikulski, S. Z.
    Kramarska, R.
    Zieliński, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/216778.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    rare earth elements (REE)
    heavy minerals
    marine sand
    paleo shoal
    Baltic Sea
    pierwiastki ziem rzadkich
    minerały ciężkie
    piasek morski
    paleo mierzeja
    Morze Bałtyckie
    Opis:
    The carried out pilot work on the concentration of rare earth elements (REE) in the Baltic marine sands from the Odra and Słupsk Banks showed that in some places their accumulations are quite interesting in terms of the placer deposits and may be the subject of an interesting prospecting project. The results of ICP-MS and electron microprobe (CAMECA SX-100) investigation confirm the close relationship of REE concentration to heavy minerals content in the sediments of marine sands. It is indicated, in addition to monazite, as a primary mineral carrier of rare earth elements. The vast preponderance of light REE is noted in the samples of heavy mineral concentrates from the Odra and Słupsk Banks as well as in the beach sand sample from the Hel Peninsula. The highest concentrations are achieved mainly by cerium and almost two times less by lanthanum. The total REE in the most interesting considered samples range from c.a. 0.14% (trench on the beach) to 0.9% (heavy minerals concentrate from the Odra Bank). The high contents of REE are accompanied by a high concentration of Th (900–150 ppm). Neodymium (0.1–0.17% Nd), whose presence is associated with the presence of pyrochlore and Nb-rutile also appears in the heavy minerals concentrate samples. It is necessary to systematically identify heavy minerals resources in the Baltic sands. More detailed research should cover the prospective areas situated to the North-East from the documented placer fields of the Odra Bank, as well as tentatively identified areas of the Słupsk Bank and submarine paleo-slope of the Hel Peninsula.
    Przeprowadzono pilotażowe prace nad koncentracją REE w piaskach bałtyckich za pomocą metodyki ICP-MS oraz mikrosondy elektronicznej (CAMECA SX-100). Analizy chemiczne składu jakościowego i ilościowego pierwiastków ziem rzadkich w próbkach piasków z koncentratów minerałów ciężkich z Ławicy Odrzanej oraz z Ławicy Słupskiej jak również z wkopu na plaży na Półwyspie Helskim (16,6 km plaży wybrzeża) osiągają zawartości REE, które mogą być interesujące pod względem surowcowym. Wyniki oznaczeń potwierdzają zależność koncentracji REE od procentowej zawartości minerałów ciężkich w osadach piasków morskich. Wskazują ponadto na monacyt jako główny wśród minerałów nośnik REE. W zbadanych próbkach koncentratów minerałów ciężkich oraz w próbce z Półwyspu Helskiego jest zdecydowana przewaga LREE. Najwyższe koncentracje osiąga głównie cer, a prawie dwukrotnie niższe lantan. Suma REE w wyżej wymienionych najciekawszych pod względem zawartości REE próbkach mieści się w zakresie od około 0,14% (wkop na plaży) do około 0,9% (koncentrat z Ławicy Odrzanej). Wysokiej koncentracji REE towarzyszy wysoka zawartość Th (900–150 ppm). W próbkach koncentratu minerałów ciężkich pojawia się również neodym (0,1–0,17% Nd), którego obecność jest związana z pojawianiem się pirochloru oraz Nb-rutylu. Konieczne jest systematyczne rozpoznanie zasobów minerałów ciężkich w piaskach bałtyckich. Dokładniejszymi badaniami powinny być objęte obszary perspektywiczne położone na północny wschód od pól złożowych objętych dokumentacją zasobową „Ławica Odrzana”, wstępnie rozpoznane obszary na Ławicy Słupskiej oraz podwodny skłon (paleo-mierzeja) Półwyspu Helskiego.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2016, 32, 4; 5-27
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie wpływu zawartości minerałów ciężkich na naturalną promieniotwórczość skał miocenu zapadliska przedkarpackiego
    Study on the impact of heavy minerals to natural radioactivity of the Miocene rocks in the Carpathian Foredeep
    Autorzy:
    Zagórska, Urszula
    Sikora, Aleksandra
    Łykowska, Grażyna
    Powiązania:
    https://bibliotekanauki.pl/articles/1834988.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    minerały ciężkie
    spektrometria gamma
    promieniotwórczość naturalna
    separacja frakcji ciężkiej
    mułowce
    skały miocenu
    zapadliska przedkarpackie
    heavy minerals
    gamma spectrometry
    natural radioactivity
    heavy fraction separation
    mudstones
    Miocene rocks
    Carpathian Foredeep
    Opis:
    W skałach miocenu zapadliska przedkarpackiego zauważono zjawisko zawyżania pomiarów promieniotwórczości naturalnej rejestrowanych w otworze wiertniczym dla mułowców. To zjawisko powoduje problemy w rozróżnianiu na podstawie profilowania naturalnej promieniotwórczości tych skał od iłowców, które charakteryzują się gorszymi parametrami petrofizycznymi. W niniejszej pracy badano kolejne możliwe źródło podwyższonej radioaktywności skał mułowcowych, to jest zawartość minerałów ciężkich, które wykazują tendencję do gromadzenia pierwiastków promieniotwórczych – uranu i toru. Minerały ciężkie, należące do grupy minerałów akcesorycznych, takie jak cyrkon, apatyt, monacyt, rutyl, granat i tytanit, charakteryzują się podwyższoną promieniotwórczością ze względu na podstawienia w sieci krystalicznej U i Th. Na testowych próbkach wykonano pomiar naturalnej promieniotwórczości metodą spektrometrii gamma, przy wykorzystaniu aparatu RT-50 firmy Georadis. Następnie z próbek skał wydzielono minerały ciężkie, przy użyciu cieczy ciężkiej, uprzednio rozdzielając próbki na frakcje ziarnowe, w celu ułatwienia separacji frakcji ciężkiej. Poszczególne frakcje ziarnowe pozbawione minerałów ciężkich złączono z powrotem i wykonano ponowny pomiar zawartości uranu, toru i potasu. Wykonano także obserwacje mikroskopowe w celu jakościowej analizy składu mineralogicznego wydzielonej frakcji ciężkiej. W badanych próbkach zidentyfikowano między innymi ziarna cyrkonu, turmalinu, granatu, rutylu, apatytu, chlorytu czy tytanitu. Przeprowadzone wyniki pomiarów naturalnej promieniotwórczości, przed i po wydzieleniu minerałów ciężkich, nie dają jednoznacznej odpowiedzi na postawiony problem zawyżonych wskazań sondy gamma. Konieczne jest zwiększenie ilości analizowanych próbek. Zaobserwowano trend spadku ilości U i Th w próbkach, z których wydzielono frakcję ciężką. Jednak zmiany promieniotwórczości są na tyle niewielkie, że nie pozwalają na wyciągnięcie ostatecznych wniosków. Dodatkowe analizy są potrzebne, aby ocenić wpływ pozostałych źródeł uranu i toru w badanych skałach, takie jak zawartość materii organicznej czy udział toru we frakcji ilastej.
    In the Miocene rocks of the Carpathian Foredeep, the occurrence of overestimating the measurements of natural radioactivity logs for mudstones was noticed. This phenomenon causes problems with recognition on the basis of natural radioactivity profiling of these rocks from claystones, characterized by inferior petrophysical parameters. In this study, another possible source of increased radioactivity of mudstone rocks, i.e. the content of heavy minerals that tend to accumulate radioactive elements - uranium and thorium - was investigated. Heavy minerals, belonging to the accessory minerals, such as zircon, apatite, monazite, rutile, garnet and titanite, are characterized by increased radioactivity due to substitutions of U and Th in the crystal lattice. Natural radioactivity of the test samples was measured using the gamma spectrometry method with the RT-50 device from the Georadis company. The heavy minerals were then removed from the rock samples using a heavy liquid, previously separating the samples into grain fractions to facilitate the separation of the heavy fraction. The individual grain fractions deprived of heavy minerals were put back together and the uranium, thorium (and potassium) content was remeasured. Microscopic observations were also made to qualitatively analyze the mineralogical structure of the separated heavy fraction. In the tested samples, among others: zircon, tourmaline, garnet, rutile, apatite, chlorite or titanite grains were identified. The results of the measurements of natural radioactivity, before and after the separation of heavy minerals, do not give a clear answer to the problem of excessive indications of the gamma logs. It is necessary to increase the number of analyzed samples. The trend of decreasing amounts of U and Th in the samples from which the heavy fraction was isolated was observed. However, changes in radioactivity are so small that they do not allow to draw final conclusions. Additional analyzes are needed to assess the impact of other sources of uranium and thorium in analyzed rocks, such as the content of organic matter or Th content in clays.
    Źródło:
    Nafta-Gaz; 2019, 75, 2; 77-82
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geologiczno-geofizyczna ocena perspektyw złożowych pierwotnych i wietrzeniowych minerałów tytanowych w rejonie ofiolitowego masywu Ślęży w Sudetach (SW Polska)
    Geologic and geophysical estimation of the prospect for ore deposit of the occurrences of primary and placer titanium minerals in the Ślęża Massif ophiolite, area, the Sudetes Mts (SW Poland)
    Autorzy:
    Wiszniewska, J.
    Petecki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075531.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    masyw Ślęży
    minerały ciężkie
    złoża rud tytanu
    anomalia magnetyczna
    anomalia grawimetryczna
    Ophiolite Ślęża Massif
    placer heavy minerals
    titanium ore deposits
    magnetic anomaly
    gravimetric anomaly
    Opis:
    Miocene aged heavy mineral (HMin) alluvial cones and regolith sands above ore-bearing gabbro and amphibolite/diabase rock zone were considered as a prospective metallotect in the area of Devonian ophiolite Ślęża Massif in the Sudets (SW Poland). The available research data from the Sobótka region indicated that the ultramafic gabbro intrusion has an interesting titanium ore enrichment with minerals such as ilmenite and titanomagnetite in the Strzegomiany-Kunów primary ultramafic rocks. The mean composition of ore gabbro samples taken from the surface contained eg; Fe -14.21%, TiO2 - 4.92%, V2O5 - 0,15. Conducted geophysical surveys in the vicinity of the presumed gabbroic rocks at thin Quaternary sediments cover, suggested the variable content ofa primary mineralization, which could be related to the increased content of heavy minerals fractions over the bed in the form of regolith or as a secondary deposit. Titanium minerals such as ilmenite, sphene, were enriched during the oxidation process and created secondary bed, where the concentrates of titanium oxides: rutile, leucoxene or oxidized ilmenite may have a high titanium content as high as 70-90%. Placer HMin sands are at present a major source of titanium deposits worldwide and the largest industrial value due to their large resources, simplicity and purity of exploitation and the ability to yield concentrates of HMin: ilmenite, rutile, pseudobrookite, anatase and leucoxene, sometimes in the company of valuable zircon, monazite or garnet. These deposits in the world are mainly used in metallurgical and chemical industries, eg; the production ofpaints and pigments used in the pharmacy, paper and paint industry. Similar observations have been reported from the region of Spain, Portugal, western Australia andfrom the south of India. Preliminary results of presented study indicate that the Strzegomiany-Kunów region can be considered as prospective not only because of the presence ofprimary titanium mineralization in gabbro, especially in diallage gabbro, amphibolite (diabase) and serpentinite, but also a presence of enriched titanium mineralization in regolith over gabbro and in clastic sediments on the foreland of Ślęża Massif.
    Źródło:
    Przegląd Geologiczny; 2016, 64, 9; 650--656
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy and light minerals as a tool for reconstructing depositional environments: an example from the Jałówka site (northern Podlasie region, NE Poland)
    Autorzy:
    Woronko, Barbara
    Rychel, Joanna
    Karasiewicz, Mirosław T.
    Ber, Andrzej
    Krzywicki, Tomasz
    Marks, Leszek
    Pochocka-Szwarc, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/94625.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    heavy minerals
    quartz grain
    periglacial processes
    source deposits
    Vistulian glaciation
    NE Poland
    minerały ciężkie
    ziarna kwarcu
    procesy peryglacjalne
    złoża źródłowe
    zlodowacenie Wisły
    Polska północna
    Opis:
    Part of northern Podlasie (NE Poland), shaped during the Wartanian stadial of the Odranian glaciation (Saalian), was situated in the periglacial zone during the Vistulian (Weichselian) glaciation. Both landforms and sediments were affected by the periglacial conditions. This is recorded at the Jałówka site, at the floor of a dry valley, where mineral deposits of 4.13 m thick, overlying organic deposits from the Eemian interglacial, were examined. These mineral deposits form four units, from bottom to top: a fluvial unit (I), a loess-like unit (II), a solifluction unit (III), and an aeolian unit with ice wedges (IV) on top of unit III. The heavy and light minerals were analysed, as well as the geochemistry, in order to find out about the parent material and to reconstruct the climatic conditions during deposition. The mineral analysis indicates that the Saalian till was predominantly derived from shallow-marine deposits; erosion accompanied by sorting of the heavy minerals took place on the basis of their mass and grain size. The original material of the till seems therefore to be sedimentary rocks from the eastern Central Baltic Basin. This material became strongly weathered under the periglacial conditions, resulting in the destruction of the quartz grains, as well as in leaching, leading to complete decalcification of the deposits. Aeolian activity resulted in infilling of ice wedges and the creation of thin layers. The intensity and the duration of these processes was limited, so that the effects of the aeolian abrasion are insignificant. Neither resulted the aeolian activity in significant reshaping of the landscape.
    Źródło:
    Geologos; 2013, 19, No. 1-2; 47-66
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bio- and lithostratigraphical investigations of eemian fluviolacustrine sediments and tills from the lower Peene valley (Ne Germany)
    Autorzy:
    Meng, S.
    Börner, A.
    Strahl, J.
    Thieke, H. U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182762.pdf
    Data publikacji:
    2009
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    glina lodowcowa
    minerały ciężkie
    analiza pyłkowa
    facje rzeczno-jeziorne
    mięczaki słodkowodne
    Marstoniopsis scholzi
    Theodoxus fluviatilis
    interglacjał eemski
    till
    heavy minerals
    pollen analysis
    fluviolacustrine facies
    freshwater molluscs
    Eemian Interglacial
    Opis:
    Badania biostratygraficzne i litologiczne wykazały, że odwiercone osady interglacjału eemskiego powstały w jeziorze przepływowym występującym w dolinie rzecznej. Przeanalizowana fauna mięczaków ma znaczenie ponadregionalne i zawiera wiele gatunków charakterystycznych dla interglacjalnych warunków rzeczno-jeziornych. Na korelację piasków z interglacjałem eemskim wskazuje obecność gatunku Theodoxus fluviatilis. Stwierdzono obecność Marstoniopsis scholzi, który dotychczas nie był znany z osadów plejstoceńskich w Niemczech. Mało zróżnicowane spektrum pyłkowe dowodzi szybkiej sedymentacji w interglacjale eemskim podczas 4. i na początku 5. poziomu pyłkowego (por. Erd, 1973). Zwiększająca się zawartość amfibolu w osadach wskazuje na wietrzenie w pierwszej części interglacjału. Otaczająca wysoczyzna polodowcowa jest pokryta jednym pokładem gliny lodowcowej (faza meklemburska, qW3), która w dolnym odcinku doliny Peene bezpośrednio przykrywa eemskie osady rzeczne. Glina lodowcowa młodszego stadiału zlodowacenia Soławy (Warthian, qS2) podściela eemskie piaski rzeczne, natomiast niżej występująca glina lodowcowa została zakwalifikowana do starszego stadiału zlodowacenia Soławy (Drenthian, qS1). Eemskie osady rzeczne współczesnego dolnego odcinka doliny Peene wskazują na istnienie doliny rzecznej starszej od ostatniego zlodowacenia.
    Źródło:
    Polish Geological Institute Special Papers; 2009, 25; 37-48
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of nutritional and chemical composition of some edible wild plants used in herby cheese
    Autorzy:
    Eryigit, T.
    Tuncturk, M.
    Tuncturk, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192472.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    Liliaceae
    herby cheese
    heavy metals
    nutritional minerals
    Opis:
    Same as in many parts of the world, many edible weeds belonging to different families that have not been cultured in Turkey are traditionally used in the making of many foods. In this study, minerals and nutrients of six edible wild plant species belonging to the Liliaceae family, which are currently used in the production of herby cheese in the Eastern Anatolia region of Turkey, were determined. The determination of these macro- and micro-minerals was performed on ICP-AES and UV Visible spectrophotometers. As a result of the study, major differences were discovered between these plant species in terms of the mineral content (Na, Mg, K, s, Ca, P, Fr, Mn, Cu, Zn, Cr, and Co) and nutrient properties (total ash, crude fibre, pH, N, and crude protein). Except for the Allium schoenoprasum species, all plant samples were found to be rich in many important minerals, such as Fe, Cu, Ca, K, Mn, and Zn, which are known to be vital for human health. The concentrations of these minerals and a few heavy metals in plant samples were found in the following ranges: 17.25 - 25.47 mg kg-1 for copper, 18.45 - 34.14 mg kg-1 for zinc, 33.42 - 98.42 mg kg-1 for manganese, 0.12 - 0.54 mg kg-1 for chromium, 0.31 - 1.61 mg kg-1 cobalt. Many significant correlations were found among the parameters analysed. The study presents essential results on the availability of some vital minerals that could be useful or harmful to consumers, in order to provide dietary information for designing value-added foods.
    Źródło:
    Journal of Elementology; 2020, 25, 3; 1127-1139
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forms of heavy metals (Zn, Pb, Cd) occuring in rhizospheres from the areas of former and contemporary Zn-Pb ore mining
    Autorzy:
    Rożek, D.
    Nadłonek, W.
    Cabała, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/88903.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    heavy metals
    rhizosphere
    Zn-Pb secondary minerals
    Olkusz Zn-Pb mining region
    historical mining
    Opis:
    The research areas were selected in the regions heavily polluted by wastes from the former washing plant, flotation waste dump and by non-sulphide Zn-Pb ores from open pit mining in the Olkusz region. The submicroscopic phases occurring in the surface of plant roots and in the rhizospheres were investigated by XRD and SEM/EDS methods. Morphology of submicroscopic metalliferous phases and their manner of occurrence were the subject of study. The analysis of EDS spectra enabled to identify phases and mineral aggregates including Zn, Pb, Fe, Mn, Cd in their structure. The soils from the washing plant and areas of open pit exploitation are contaminated by diverse complexes of minerals. The occurrence of unstable Fe, Pb, Ca sulphates indicate that these wastes are still intensively geochemically active.
    Źródło:
    Mining Science; 2015, 22, Special Issue 2; 125-138
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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