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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:
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:
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:
The content of selected minerals and some heavy metals in food products from Southern Poland. I. Wheat and rye grain
Autorzy:
Miedzobrodzka, A.
Sikora, E.
Cieslik, E.
Powiązania:
https://bibliotekanauki.pl/articles/1371724.pdf
Data publikacji:
1992
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
food product
rye
wheat
Polska
mineral
environment pollution
cereal
animal nutrition
heavy metal
Źródło:
Polish Journal of Food and Nutrition Sciences; 1992, 01, 1; 45-50
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The assemblages of transparent heavy minerals in Quaternary sediments of the Kielce-Łagów Valley (Holy Cross Mountains, Poland)
Autorzy:
Ludwikowska-Kędzia, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/94365.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
heavy mineral analysis
Quaternary deposits
Holy Cross Mountains
analiza ciężkich minerałów
złoża czwartorzędowe
Góry Świętokrzyskie
Opis:
The composition of the transparent heavy-mineral assemblages (0.25-0.1 mm) in Quaternary slope, karst, glacial, fluvioglacial and fluvial deposits with different parent material was investigated in the Kielce-Łagów Valley (the central part of the Palaeozoic core of the Holy Cross Mountains). For the purpose, 93 samples of mostly sandy sediments were examined. Some marker and some supporting minerals can be distinguished. Slope and karst deposits are dominated by the abrasion-resistant minerals zircon, tourmaline, staurolite and rutile. This assemblage points at a source consisting of strongly weathered pre-Quaternary bedrock. Glacial and fluvioglacial deposits are dominated by medium-resistant and non-resistant minerals (garnet, amphibole, pyroxene and biotite). The two types of parent material of the heavy minerals are typical of the Quaternary deposits in the Polish uplands. The two sources are most clear in the younger (Vistulian and Holocene), mostly fluvial sediments. The results of the analysis imply that the impact of Pleistocene glaciers on the central part of the Holy Cross Mountains was neither large enough to hide the local mineralogical background, nor sufficient to dominate over the main processes transforming the mineral composition under the variable climatic conditions of the Quaternary, including aeolian processes and chemical weathering.
Źródło:
Geologos; 2013, 19, No. 1-2; 95-129
1426-8981
2080-6574
Pojawia się w:
Geologos
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:
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:
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:
Source rocks for heavy minerals in lower part of Menilite Formation of Skole Nappe (Polish Flysch Carpathians), based on study of detrital garnet and tourmaline
Autorzy:
Salata, D.
Powiązania:
https://bibliotekanauki.pl/articles/191968.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
detrital tourmaline
detrital garnet
provenance
flysch
Menilite Formation
Oligocene
Skole Nappe
Opis:
The study focused on the chemistry of detrital garnet and tourmaline from sediments of the Boryslav and Kliva Sandstone types in the Oligocene part of the Menilite Formation of the Skole Nappe (Western Outer Carpathians, Poland), with regard to provenance. Almandine and almandine-pyrope compositional varieties are the most common garnets, with minor almandine-pyrope-grossular garnet. Scarce garnet grains, with grossular and spessartine as the dominant end-members, are also present. The tourmaline belongs to the alkali tourmaline principal group and represents the schörl-dravite series. The detrital garnet and tourmaline display strong, compositional similarities to minerals, occurring in igneous and metamorphic rocks of the Bohemian Massif, as well as to detrital grains, deposited within the internal basins of the massif. This suggests that the primary rocks for the garnet and tourmaline may be crystalline complexes of the Bohemian Massif. However, other uplifted areas, similar to the complexes of the Bohemian Massif, cannot be ruled out. Such hypothetical areas could be located in the northern foreland of the Carpathian basins. Euhedral tourmaline and other minerals, occurring in the heavy- mineral assemblages studied, most probably were derived from eroded and presently not exposed, crystalline complexes, originally situated in the Skole Basin foreland or within the basin.
Źródło:
Annales Societatis Geologorum Poloniae; 2013, 83, 1; 1-17
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
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:
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:
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:
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:
Provenance of heavy minerals to the Middle and Upper Jurassic epicontinental deposits of NW Poland
Autorzy:
Bembenek, Kinga
Woronko, Barbara
Ziółkowski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2058859.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Middle Jurassic
Upper Jurassic
weathering indices
sea level change
stratigraphic gaps
Opis:
The source of clastic material supplied to the epicontinental sea during the Middle and Late Jurassic in the Pomeranian Segment of the northern part of the Mid-Polish Trough is analysed, using deposits from the Rzeczyn PIG-1 borehole that represent the Łyna, Chociwel, Brda, Pałuki, Kcynia and Rogoźno formations. Heavy mineral analysis, including weathering indices (ZTR, GZI, RZI and Q) and standardised scores for each mineral species, shows that each formation is characterized by a different heavy minerals association. In each association, transparent minerals include both ultrastable minerals (zircon, tourmaline and rutile), occurring in various proportions, and unstable minerals. This indicates that deposits subject to earlier multiple reworking were eroded from the surrounding landmasses. Most probably these deposits represented Triassic rocks, although fresh weathering covers were also eroded. The main direction of clastic material supply was from the N and NW, and to a lesser degree from the NE. The main reasons for changes in the source areas were probably sea level oscillations, while during regressions, exposed parts of the seabed became source areas of clastic material. Conversely, during transgressions, parts of the seabed became cut off from the supply of clastic material from eroded landmasses.
Źródło:
Geological Quarterly; 2021, 65, 1; 2
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
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