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Wyświetlanie 1-15 z 47
Tytuł:
Glacial morphogenesis of uplands of the Warta Glaciation in Poland as a con trol on heavy metal distribution in deposits
Autorzy:
Falkowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/2059214.pdf
Data publikacji:
2009
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
morphogenesis
areal deglaciation
geomorphological units
heavy metals
Opis:
The investigations were carried out to determine the relation ship between Cr, Co, Cd, Cu, Zn and Pb content and glacial morphogenesis that implies the geomorphological position of out crops of Quaternary deposits. The analysis deals with parts of two glacial uplands whose relief developed during deglaciation of the Warta ice sheet and which are characterized by similar relief and lithology of surface deposits. These are the Nidzica Upland near Grzebsk and the Bielsk Plain near Bielsk Podlaski. These areas show distinct regularity in pattern of geomorphological units, proving their areal deglaciation. Melt-out depressions, side valleys, ablation covers, kame terraces and kames as well as glaciofluvial plains are observed. The typical geomorphological element is isolated morainic hills (mesas). The investigations en abled determinations of regularity in the distribution of chemical eleements in the soil environment of the geomorphological units. Among mineral sediments, clay interlayers observed within kameter race and kame deposits were the most susceptible to concentrations of heavy metals, regard less of the region and the element to be determined. Lower Cd, Cu, Co, Pb, Zn and Cr contents were as sociated with morainic mesa and ablation cover deposits. The lowest contents of heavy minerals were mea sured in glaciofluvial plain, kame and kame terrace sands. Among land forms filled with organic deposits, the high estabilities to fix Cr, Co, Cu and Zn were shown by ice-dammed basins within upland deposits (Nidzica Upland) and side valley deposits (Bielsk Plain). Peats and muds of melt-out depressions were found to be most active in retaining Cd and Pb.
Źródło:
Geological Quarterly; 2009, 53, 3; 293-304
1641-7291
Pojawia się w:
Geological Quarterly
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:
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:
Metale ciężkie w kopalinach ilastych wybranych złóż Wielkopolski
Heavy metals in selected clay deposits from Wielkopolska
Autorzy:
Duczmal-Czernikiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/2063082.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
metale ciężkie
złoża iłów
Wielkopolska
heavy metals
clay deposits
Opis:
W artykule przedstawiono wyniki badań koncentracji metali ciężkich w złożach kopalin ilastych w Wielkopolsce, w których eksploatowane są iły z górnej części warstw poznańskich. Analizy chemiczne wykonano z zastosowaniem metod INAA i ICP-MS. Zawartości Cu, Zn, Cd, Ni oraz Cr w badanych iłach są zgodne z typowymi zawartościami w iłach oraz z koncentracją w skorupie kontynentalnej (UCC). Koncentracje Zn, Cd, Cu i V są wyższe w drobnych frakcjach osadu (φ <2 µm i φ <0,2 µm) niż w całych próbkach. Rozmieszczenie metali w iłach pstrych oraz w drobnych frakcjach osadów jest kontrolowane głównie przez procesy wietrzenia chemicznego.
Concentration of heavy metals in clay deposits in Wielkopolska area was studied, where the upper part of “Poznań Clays” are exploited. Chemical analyses were made using INAA and ICP-MS. The contents of Cu, Zn, Cd, Ni and Cr in studied clays are generally typical for clay sediments and UCC (Upper Continental Crust). Zn, Cd, Cu and V concentrations are higher in fine fractions (φ <2 μm and φ <0.2 μm) than in whole samples. Distribution of metals in red clays and in fine fractions of sediments is controled mainly through chemical weathering processes.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2010, 439 (2); 297--301
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
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:
Geochemiczna zmienność pierwiastków ziem rzadkich i metali ciężkich w osadach profundalu i litoralu wybranych jezior Polski
Geochemical variability of rare earth elements and heavy metals in profundal and littoral sediments from selected lakes of Poland
Autorzy:
Małecka, K.
Powiązania:
https://bibliotekanauki.pl/articles/2062779.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
osady jeziorne
REE
metale ciężkie
lake sediments
heavy metals
Opis:
Z 30 jezior położonych na pojezierzach Pomorskim, Wielkopolsko-Kujawskim i Warmińsko-Mazurskim pobrano po 2 próbki osadów (ze strefy litoralnej i profundalnej). Do badań wytypowano jeziora położone na podłożu o jednorodnej budowie geologicznej. Połowa z nich leży na podłożu o małej przepuszczalności (gliny, iły) i połowa na obszarach o dużej przepuszczalności (piaski, żwiry). Po roztworzeniu w wodzie królewskiej w próbkach osadów jeziornych oznaczono zawartość REE (La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) metodą ICP-MS oraz As, Cd, Co, Cu, Hg, Mo, Ni, Pb, Sn, V, W, Zn metodą ICP-OES. Osady jezior położonych na glinach i iłach charakteryzowały się większą zawartością pierwiastków REE, metali ciężkich i arsenu w stosunku do osadów jezior położonych na piaskach i żwirach. Większe zawartości REE występują w strefie litoralnej w porównaniu ze strefą profundalną, co wskazuje, że na ich zawartość wpływa głównie skład chemiczny podłoża zlewni, czynnik antropogeniczny odgrywa mniejszą rolę. Dystrybucja metali ciężkich i arsenu zależy od rodzaju podłoża, na którym powstała misa jeziorna i głębokości sedymentacji – gromadzą się one głównie w strefie profundalnej.
Sixty sediment samples were collected from 30 glacial lakes of Pomerania, Wielkopolska-Kujawy and Warmia-Masuria Lakelands. The influence of the lake basin lithology and sedimentation zone on the contents of the elements in sediment was investigated. The samples were digested in Aqua Regia and analysed by ICP-MS methods and ICP-OES techniques for REE contents (La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu). As, Cd, Co, Cu, Hg, Mo, Ni, Pb, Sn, V, W, Zn contents were determined by ICP-OES method. The sediments show higher contents of REE in the littoral zone than in the profundal zone. The sediments from the lakes located on low-permeable glacial sediments are more abundant in heavy metals and REE in relation to the sediments from the lakes located on highly permeable glacial sediments. Distribution of the trace elements in lake sediments is strongly dependent on the type of geological formations on which the lake is developed and on the sedimentation zone of the lake. REE are preferentially accumulated in the littoral zone contrary to the heavy metals that are accumulated in the deepest zone of the lake. Factor analysis proves that the presence of REE and heavy metals in the lake sediment is associated with the type of geological formation.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2012, 450; 63--74
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
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:
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:
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:
Geochemical characteristics of bottom sediments in the Odra River estuary - Roztoka Odrzańska (north-west Poland)
Autorzy:
Piotrowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/2058755.pdf
Data publikacji:
2004
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Roztoka Odrzańska
Odra River estuary
bottom sediments
TOC
heavy metals
MDS
Opis:
Roztoka Odrzańska is the last section of the Odra River estuary. Both in 1996, and in 1999 concentrations of Zn, Cu, Pb, Cd and Hg in the surface waters of Roztoka Odrzańska were within the limits for I class of purity. Maps of the heavy metal distributions in bottom sediments resemble those of TOC distribution in the < 0.20 mm fraction. Overall, 58.3% of the bottom sediments of Roztoka Odrzańska in 1996, as regards concentrations of Cd, Zn, Pb, Cu and Hg, belonged to class IV of purity; 14.6% belonged to class III; 18.8% belonged to class II and 8.3% to class I at all research stations. The excessive pollution the Roztoka Odrzańska sediments is controlled mainly by Cd and Zn concentrations and, to a much lower degree by Pb. Analyses in 1999 showed similar average concentrations of Cu, Zn and Pb, but less than half the content of cadmium. Concentrations, though, of cobalt (1.8x) and especially mercury (22.7x) were higher than the 1996 average levels. The observed concentrations fall within the concentration limits recorded in 1996 for Cu, Zn, Pb, Cd and Co, but they exceed these limits considerably for Hg.
Źródło:
Geological Quarterly; 2004, 48, 1; 61--76
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
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