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Tytuł:
Upper Cambrian trilobite biostratigraphy and taphonomy at Kakeled on Kinnekulle, Vastergotland, Sweden
Autorzy:
Terfelt, F
Powiązania:
https://bibliotekanauki.pl/articles/20589.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
depositional environment
trilobite
Trilobita
Sweden
Upper Cambrian
biostratigraphy
Cambrian
paleontology
Opis:
A section through the Upper Cambrian black shales and limestones at Kakeled on Kinnekulle, Västergötland, Sweden, extends from the lower–middle part of the Agnostus pisiformis Zone into the Peltura scarabaeoides Zone. Fossils are usually preserved only in the stinkstones, but in the A. pisiformis Zone trilobites can be found also in the shales. Lithologically, the stinkstones can be subdivided into primary coquinoid limestone, which include the majority of the fossils, and early diagenetically formed limestone. The orientation of cephala and pygidia of A. pisiformis were measured on four shale surfaces and one stinkstone surface. The majority of the shields were deposited with the convex side up and showed a preferred orientation, suggesting that their positions were affected by currents. Above the A. pisiformis Zone the section comprises the Olenus/Homagnostus obesus Zone (0.30 m), the upper part of the Parabolina spinulosa Zone (0.05 m), the Peltura minor Zone (1.15 m), and the Peltura scarabaeoides Zone (2.50 m). The Leptoplastus and Protopeltura praecursor zones are missing. The Olenus/H. obesus Zone is represented only by the O. gibbosus and O. wahlenbergi subzones, whereas the O. truncatus, O. attenuatus, O. dentatus, and O. scanicus subzones are missing.
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Cretaceous - Early Palaeogene sandy-to-gravelly debris flows and their sediments in the Silesian Basin of the Alpine Tethys (Western Outer Carpathians, Istebna Formation)
Autorzy:
Strzeboński, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059835.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
flysch Carpathians
Silesian Nappe
Istebna Formation
deep-water sedimentary environment
sediment gravity flows
debris flows
siliciclastic deposits
debrites
depositional system
apron
Opis:
The study focuses on Upper Cretaceous - Palaeocene deposits from the Beskid Śląski mountain range in southern Poland constituting the Istebna Beds. The Istebna Beds, also referred to as the Istebna Formation, are part of the Silesian tectonic unit, which forms the Outer Carpathian fold-and-thrust belt (part of the Alpine-Carpathian system). The results of qualitative and quantitative lithological-sedimentological studies were the basis for the interpretation of lithofacies types, sedimentary processes and palaeoenvironment as well as for the reconstruction of the architecture of the depositional system. The analysis conducted on the basis of field description of the deposits shows the prevalence (nearly 70%) of siliciclastic strata representing a sandstone-conglomerate association (S-C), which is the main subject of this work. The S-C lithofacies: sandstones, gravelly sandstones, sandy conglomerates and conglomerates constitute the deposits formed mostly by mass gravity-flows such as sandy-to-gravelly debris flows. The distribution of the coarse-clastic material indicates a sediment supply from southerly directions and implies the presence of an active source area in the rear part of the Silesian Basin. A succession of the sandstone-to-conglomerate deposits with the secondary participation of other lithofacies, with a thickness of approximately two thousand metres, indicates temporary increased diastrophic activity in the Silesian Ridge (source area) and the intense denudation of this area. The uplift of the alimentation area and its destruction coinciding with enforced relative regression and the uncovering of the proximal depositional zone of the basin led to resedimentation of the older intrabasinal material and repeated mass deposition together with delivery of extraclasts of pre-existing rocks and minerals. The lithofacies development of the sandstone-to-conglomerate debrites and the related sedimentary palaeotransport directions suggest an accumulation domain in the form of a linear apron depositional system developed in a deep-water setting. Experimental modelling of subaqueous sandy flows has contributed to a better understanding of the complex genesis of deep-water sediment gravity flows developing in depositional systems rich in sand material.
Źródło:
Geological Quarterly; 2015, 59, 1; 195--214
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza statystyczna parametrów mikrofacji dolomitu głównego w granicznej strefie platformy węglanowej
Statistical analysis of the main dolomite microfacies parameters in the boundary zone of carbonate platform
Autorzy:
Semyrka, R.
Jarzyna, J. A.
Krakowska, P. I.
Semyrka, G.
Powiązania:
https://bibliotekanauki.pl/articles/216733.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
dolomit główny
platforma węglanowa
środowisko depozycyjne
mikrofacja
Gorzów
Grotów
Krobielewko
Main Dolomite
carbonate platform
depositional environment
microfacies
Opis:
Duża liczba wyników badań laboratoryjnych parametrów zbiornikowych dolomitu głównego na obszarze platformy węglanowej, w rejonie wschodniej części platformy Gorzowa, w zatoce Noteci wraz z mikroplatformą Krobielewka, na półwyspie Grotowa, oraz na fragmencie platformy wielkopolskiej, sięgającym rejonu Pniew umożliwiła wykonanie wiarygodnych analiz statystycznych. Standardowe badania na próbkach skał (gęstości objętościowej, porowatości efektywnej i przepuszczalności fizycznej) wzbogacone zostały o wyniki pomiarów porozymetrii rtęciowej. Wyniki badań laboratoryjnych, przede wszystkim porozymetrii rtęciowej, rozszerzyły znacznie informację o skale zbiornikowej (dolomicie głównym) i przyczyniły się do wydzielenia różnorodnych mikrofacji oraz stref paleogeograficznych. Na podstawie wyników przeprowadzonej analizy statystycznej porównano parametry petrofizyczne trzech mikrofacji i stwierdzono, że utwory ziarnozwięzłe charakteryzowały się najlepszymi właściwościami zbiornikowymi. Dla tych utworów stwierdzono wysoką średnią porowatość efektywną oraz wysoką średnią porowatość dynamiczną dla gazu i ropy. Utwory te charakteryzowały się także wysoką przepuszczalnością. [...]
Reliable statistical analysis was carried out for the Main Dolomite reservoir parameters on the area of carbonate platform in the vicinity of the east part of Gorzów Platform, in the Noteć Bay, together with Krobielewko Microplatform, on the Grotów Peninsula and on the part of Wielkopolska Platform, reaching Pniewy region thanks to large number of laboratory measurements results. The standard measurements on the core samples (bulk density, effective porosity and absolute permeability) were enriched by mercury porosimetry results. Laboratory measurements results, especially mercury porosimetry, extended considerably information about the reservoir rock (the Main Dolomite) and contributed to the separation of diverse microfacies and paleogeographic zones. Petrophysical parameters of the three microfacies were compared based on the results of statistical analysis. It was found that grainstones were characterized by the best reservoir parameters. For these microfacies high average effective porosity and average dynamic porosity for oil and gas were discovered. Additionally, grainstones characterized by high permeability. [...]
Źródło:
Gospodarka Surowcami Mineralnymi; 2015, 31, 1; 123-140
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sedimentological and palaeoecological significance of the trace fossils of the Jurassic rocks of the Jhura Dome, Mainland Kachchh, western India
Autorzy:
Patel, S. J.
Patel, N. J.
Powiązania:
https://bibliotekanauki.pl/articles/2077327.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Jurassic
ichnoassemblages
ichnoguilds
ichnofacies
depositional environment
Kachchh
India
jura
skamieniałość śladowa
Indie
Opis:
The Middle to Late Jurassic succession of the Jhura Dome (Jhurio and Jumara formations) of the Mainland Kachchh, western India, comprises a ~500 m thick succession of clastic carbonates and mixed siliciclastic-carbonates, intercalated with shales. The sequence, as based on sedimentological characteristics, exhibits six sedimentary facies and four subfacies. Certain exceptional bands of the ripplemarked calcareous sandstone, shale and oolitic limestone facies are rich in ammonites, belemnites, brachiopods and bivalves. Thirty four ichnogenera were also identified and analysed paleoecologically. These trace fossils represent five ethological categories and six ichnoassemblages. Seventeen ichnoguilds are demonstrated based on space utilization for characterising the ecological complexity of ichnoassemblages. Bathymetric control of the trace fossils resulted with development of Skolithos, Cruziana and Zoophycos ichnofacies type conditions. The sedimentological and ichnological data analysis revealed seven distinctive depositional regimes ranging from offshore shelf below storm wave base to middle shoreface.
Źródło:
Volumina Jurassica; 2015, 13, 2; 101--139
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Facies and integrated stratigraphy of the Upper Turonian (Upper Cretaceous) Grossberg Formation south of Regensburg (Bavaria, southern Germany)
Autorzy:
Niebuhr, B.
Richardt, N.
Wilmsen, M.
Powiązania:
https://bibliotekanauki.pl/articles/139052.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kreda
środowisko depozycyjne
turon
zintegrowana stratygrafia
Danubian Cretaceous Group
depositional environment
Grossberg Formation
integrated stratigraphy
Sedimentary unconformities
Turonian
Opis:
The Upper Turonian Grossberg Formation of the Regensburg area (Danubian Cretaceous Group, Bavaria, southern Germany) has a mean thickness of 20-25 m and consists of sandy bioclastic calcarenites and calcareous sandstones which are rich in bryozoans, serpulids and bivalves (oysters, rudists, inoceramids). Eight facies types have been recognized that characterize deposition on a southward dipping homoclinal ramp: the inner ramp sub-environment was characterized by high-energy sandwave deposits (sandy bioclastic rud- and grainstones, bioclastic sandstones) with sheltered inter-shoal areas. In mid-ramp settings, bioturbated, glauconitic, calcareous sand- and siltstones as well as bioturbated, bioclastic wacke- and packstones predominate. The carbonate grain association of the Grossberg Formation describes a temperate bryomol facies with indicators of warm-water influences. An inferred surplus of land-derived nutrients resulted in eutrophic conditions and favoured the heterozoan communities of the Grossberg Ramp. Carbon stable isotope geochemistry cannot significantly contribute to the stratigraphic calibration of the Grossberg Formation due to the depleted and trendless bulk-rock [delta^13]C values, probably resulting from a shallow-water aquafacies with depleted [delta^13]C DIC values and low [delta^13]C values of syndepositional and early diagenetic carbonate phases. However, strongly enriched skeletal calcite [delta^13]C values support a correlation of the Grossberg Formation with the mid-Late Turonian positive Hitch Wood isotope event (Hyphantoceras Event of northern Germany). This interpretation is supported by biostratigraphic data and a range from the Mytiloides striatoconcentricus Zone into the lower My. scupini Zone is indicated by inoceramid bivalves. Both the base and top of the Grossberg Formation are characterized by unconformities. Sequence boundary SB Tu 4 at the base is a major regional erosion surface (erosional truncation of the underlying Kagerhoh Formation in the Regensburg area, fluvial incision at the base of the Seugast Member of the Roding Formation in the Bodenwohr area towards the north and northeast). It is suggested that this unconformity corresponds to a major sea-level drop recognized in many other Cretaceous basins below the Hitch Wood or Hyphantoceras Event. The transgression and highstand of the Grossberg Formation is concomitant to the deposition of the fluvial Seugast Member and the onlap of the marginal-marine. Veldensteiner Sandstein. onto the Frankische Alb. The unconformity at the top of the Grossberg Formation (late Late Turonian SB Tu 5) is indicated by a ferruginous firm-/ hardground and an underlying zone of strongly depleted [delta^13]C values. The abrupt superposition by deeper marine marls of the lower Hellkofen Formation (uppermost Turonian.Lower Coniacian) may be connected with inversion tectonics at the southwestern margin of the Bohemian Massif.
Źródło:
Acta Geologica Polonica; 2012, 62, 4; 595-615
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Facies Analysis and Depositional Environmental Interpretation of The Upper Oligocene, Block 09- 2/10, Cuu Long Basin
Autorzy:
Nguyen, Muoi Duy
Le, Anh Ngoc
Nguyen, Hoa Minh
Bui, Ngan Thi
Powiązania:
https://bibliotekanauki.pl/articles/27323232.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
Cuu Long basin
upper oligocene
depositional environment
seismic facies
block 09-2/10
Oligocen
Wietnam
sejsmika
środowisko
Opis:
The article presents the facies and environment of the Upper Oligocene sediments in the area of block 09-2/10 based on the analysis of seismic facies and well data of the neighboring areas. The results of the interpretation of seismic data indicate that the upper Oligocene sediments are limited by the top C, top D seismic reflectors. The environment is formed from lagoons, lakes to deep lakes. Seismological facies analysis identified 03 facies including seismic facies with medium to poor reflection amplitude, medium continuous, low frequency reflecting the lacustrine sediments (80%) in most of the lake center. Strong reflective seismic facies, sigmoidal clinoforms reflect the lakeside sediments (15%) distributed in the lakeside shelf. The seismic facies with average and continuous amplitude poorly reflect alluvial sediments (5%) in the Northwest region. The direction of sediment transport is mainly from the Northwest and Southwest in the area. The sandstone sequences are distributed on the slopes of the lake and the lake bottom, which is potential reservoir.
Źródło:
Inżynieria Mineralna; 2023, 2; 155--162
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sedimentological and palaeocological records of the evolution of the south west ern part of the Carpathian Foredeep (Czech Republic) during the early Badenian
Autorzy:
Nehyba, S.
Tomanová Petrová, P.
Zágoršek, K.
Powiązania:
https://bibliotekanauki.pl/articles/2060200.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Carpathian Foredeep
early Badenian
sedimentology
palaeoecology
depositional environment
foraminifers
bryozoans
Opis:
The depositional environment of the southern part of the Carpathian Foredeep in the Czech Republic was studied in two boreholes using sedimentological and palaeontological methods. Eight lithofacies were recognised within cores of the early Badenian deposits, comprising two facies associations, namely deposits of a coarse-grained Gilbert delta and offshore deposits. As sem blages of foraminifers document the early Badenian (Middle Miocene age). Two types of assemblages were recognised: (1) primary taphocoenoses reflecting the original environment of sedimentation, i. e. a relatively deep sublittoral (circalittoral) environment with low to normal ox ygen bottom conditions and deep-water euryoxibiont foraminifers, numerous planktonic foraminifers, agglutinated foraminifers and mixed assemblages of deep- and shallow-water foraminifers, (2) secondary taphocoenoses of shallower sublittoral (infralittoral) condition redeposited into the basin by gravity currents. These assemblages contain shallow-water foraminifers coupled with an abundant and diverse bryozoan fauna.
Źródło:
Geological Quarterly; 2008, 52, 1; 45-60
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sedimentological study of the Nikolčice Formation : evidence of the Middle Jurassic transgression onto the Bohemian Massif (subsurface data)
Autorzy:
Nehyba, S.
Opletal, V.
Powiązania:
https://bibliotekanauki.pl/articles/2060331.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Nikolčice Formation
Middle Jurassic
provenance
shallow marine
nearshore depositional environment
Opis:
The Jurassic sedimentary succession along the eastern margin of the Bohemian Massif starts with mostly fluvial deposits of the Gresten Formation and continues after marine transgression with the deposition of the Nikolčice Formation (Middle Jurassic, Callovian). The provenance and depositional environment of the Nikolčice Formation showed that deposition occurred within offshore, transitional zone, shoreface, foreshore and littoral sand bar environments; however, shoreface and foreshore deposits dominate in the cores studied. The crystalline units along the eastern margins of the Bohemian Massif represent the primary source of deposits of the Nikolčice Formation. An important role was played by acidic and intermediate plutonites and highly metamorphosed metasedimentary rocks (granulite and amphibolite metamorphic facies), which indicates an advanced stage of erosion of the source area. The role of volcanic and intrusive rocks was small. The primary source was followed by an additional recycled source from older sedimentary rocks (especially the Moravo-Silesian Paleozoic deposits – the Líšeň Formation, the Myslejovice Formation). A similarity of the source areas for the Nikolčice Formation and the underlying Gresten Formation was recognized. Identified differences in their source areas are mainly explained by varied erosional levels due to successive exhumation of the source Variscan orogen and possibly also by an expansion of the source area.
Źródło:
Geological Quarterly; 2017, 61, 1; 138--155
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Petrological and facies characteristics of bituminous coal seam No. 111 from the Libiąż layers in the region of Dąb near Chrzanów (USCB)
Charakterystyka petrologiczna i facjalna pokładu węgla kamiennego 111 z warstw libiąskich w rejonie Dębu koło Chrzanowa (GZW)
Autorzy:
Misiak, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/216094.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
bituminous coal
lithology
petrology
facies
depositional environment
węgiel bitumiczny
litologia
petrologia
fasety
środowisko osadzania
Opis:
The new boreholes drilled between 2009 and 2012 enabled a detailed exploration of the profile of the Kraków sandstone series in the Dąb area between the “Sobieski” and “Janina” mining plants, USCB (Upper Silesian Coal Basin). The core from the No. 111. bituminous coal seam was selected for further analysis. 30 intervals corresponding to the defined lithotypes were separated in the seam with a thickness of 116.8 cm. The thickness of lithotypes ranges from 10 mm to 89 mm. A microprofile of the examined seam was made using the modified method of determining microlithotypes. A quantitative determination of the maceral composition was performed for each interval corresponding to the separated lithotypes. This allowed petrographic and facies characteristics of the seam to be determined. Its lower part is dominated by lithotypes with a large share of bright coal – vitrain coal. This section of the profile was formed under conditions of a strongly flooded wet forest swamp. In the upper section of the seam, a higher macroscopic share of dull coal – durain was observed. The microscopic analysis has shown that the conditions dominant during the formation of this section were typical for swamp forest peats. New technologies also require expanding knowledge about the structure of coal seams. This is only possible with a detailed profiling of the coal seam on a macro scale combined with micro-profiling and a detailed petrographic description of the isolated lithotypes. This methodology is also useful in the facies analysis of bituminous coal seams.
Nowe odwierty w latach 2009–2012 rozpoznały szczegółowo profil utworów krakowskiej serii piaskowcowej w rejonie miejscowość Dąb pomiędzy granicami zakładów górniczych Sobieski i Janina, GZW. Z nawierconych pokładów węgla do dalszych badań pobrano rdzeń pokładu węgla Kamiennego 111. W pokładzie o miąższości 116,8 cm wydzielono 30 interwałów odpowiadających zdefiniowanym litotypom. Miąższość litotypów waha się w przedziale od 10 do 89 mm. Za pomocą zmodyfikowanej metody wydzielania mikrolitotypów wykonano mikroprofil badanego pokładu pokładu. Dla każdego interwału odpowiadającego wydzielonym litotypom wykonano oznaczenie ilościowe składu macerałowego. Pozwoliło to na charakterystykę petrograficzną, jak i facjalną pokładu. Dolna jego część zdominowana jest przez litotypy mające duży udział węgla błyszczącego – witrynu. Ten odcinek profilu tworzył się w warunkach torfowiska silnie podtopionego typu Wet Foret Swamp. W odcinku górnym pokładu zaobserwowano makroskopowo większy udział węgla matowego – durynu. Badania mikroskopowe wskazują, że podczas tworzenia się tego odcinka dominowały warunki wskazujące na torfowisko typu Swamp Forest. Nowe technologie przetwarzania węgla wymagają również poszerzenia wiedzy na temat budowy pokładów węgla. Jest to możliwe tylko dzięki szczegółowemu profilowaniu pokładu węgla w skali makro w połączeniu z mikroprofilowaniem i szczegółowym petrograficznym opisem wydzielonych litotypów.
Źródło:
Gospodarka Surowcami Mineralnymi; 2019, 35, 4; 85-96
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Litotypy węgla z pokładu 308 (pensylwan) z KWK "Ziemowit" (GZW) jako wskaźniki środowisk sedymentacyjnych
The lithotypes composition and deposition environment of coal from the No. 308 coal seam (Pennsylvanian) from "Ziemowit" mine - Upper Silesian Coal Basin, Poland
Autorzy:
Misiak, J.
Powiązania:
https://bibliotekanauki.pl/articles/183515.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
węgiel
petrografia
macerały
środowisko sedymentacji
macerals
coal
petrography
depositional environment
Opis:
Charakterystykę petrograficzną i facjalną węgla przeprowadzono na podstawie opisu litotypów i ich charakterystyki petrograficznej. Za główny czynnik warunkujący proces sedymentacji torfu przyjęto poziom zwierciadła wody w torfowisku, za którym podążała sukcesja roślin zasiedlających torfowisko, a deponowane szczątki roślinne były poddawane procesom żelifikacji lub oksydacji. Wyróżniono trzy środowiska obejmujące strefę sedymentacji torfu: torfowisko trwale podtopione z dwoma subśrodowiskami - strefą brzeżną i centralną, torfowisko okresowo podtopione z dwoma subśrodowiskami - podtopionym i przesuszonym, torfowisko wyniesione z dwoma subśrodowiskami - progresywnym i regresywnym. Subśrodowisko brzeżne obejmuje strefę peryferyjną jezior lub rozlewiska rzecznego, gdzie nie zachodziła akumulacja torfu.
The composition of coal and deposition environment characterization were made based on lithotype and maceral analyses. The proposed facies are based on an assumption that oscillations of water table in a peat-bog affect the petrographic composition of coal, while stronger influxes of water table into the peat-bog increase the content of mineral matter in coal. The author has identified three major types of peat-bog environments in which plant material was deposited in the Carboniferous period. There are: permanently inundated-planar mire (PM) with two sub-environments - PM "margin" and PM "central", temporarily inundated-transitional mire (TM) with two sub-environments - TM "wet" and TM "dry", and elevated-domed mire (DM) with two sub-environments - DM "progressive" and DM "regressive".
Źródło:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2007, 33, 3; 281-288
0138-0974
Pojawia się w:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Facies types and depositional environments of a morphologically diverse carbonate platform : a case study from the Muschelkalk (Middle Triassic) of Upper Silesia, southern Poland
Autorzy:
Matysik, M.
Powiązania:
https://bibliotekanauki.pl/articles/191824.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
lithofacies assemblage
depositional sequence
sabkha-tidal flat-lagoon environment
shoreface-off- shore environment
Central Europe
Opis:
The detailed sedimentological study of the 150-m-thick Muschelkalk succession, deposited on a small (~200 by 80 km), morphologically diverse Upper Silesian carbonate platform during four major marine-transgressive pulses of the Tethys Ocean, enhanced the understanding of the depositional history, palaeogeography, and facies distribution. A total of thirty-five lithofacies types were identified, described and interpreted in terms of depositional settings. These different lithofacies represent various shallow-marine environments along the platform transect, from peritidal to offshore areas. The vertical and lateral organization of the lithofacies delineated was caused by the interplay of platform morphology, third-order eustasy and the long-term tectonic evolution of the area. Accordingly, the carbonate system studied is a good example of the influence of large-scale processes on the facies architecture of carbonate platforms. In general, all of the four Transgressive Systems Tracts are characterized by similarity in lithofacies composition and vertical succession and by minor lateral change, indicating only limited influence of the three large-scale factors mentioned on lithofacies development and distribution during transgressions. In contrast, each of the four associated Highstand Systems Tracts comprises an individual (unique) lithofacies assemblage displaying substantial regional and local variation, which indicates that the filling of accommodation space during highstands strongly depended on the extrinsic processes.
Źródło:
Annales Societatis Geologorum Poloniae; 2016, 86, 2; 119-164
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal maturity and depositional environments of organic matter in the post-Variscan succession of the Holy Cross Mountains
Autorzy:
Marynowski, L.
Salamon, R.
Narkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059919.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Holy Cross Mountains
Permian
Triassic
biomarkers
depositional environment
thermal maturity
Opis:
The results of GC-MS investigations of biomarkers in organic matter from the epicontinental Permian and Triassic strata of the Holy Cross Mts. indicate generally suboxic (Permian) and oxic (Triassic, except for the Middle Muschelkalk) depositional environments with accompanying intensive bacterial reworking of organic remains. The biomarker spectra found in the Middle Muschelkalk and in the Entolium discites Beds (Upper Muschelkalk) show the presence of gammacerane, an increased concentration of C34 homohopanes and a Pr/Ph ratio not exceeding 1. All these observations suggest a hypersaline sedimentary environment with water column stratification and poorly oxygenated conditions. Thermal maturity investigations were based on both vitrinite reflectance and biomarker indices. The organic matter in the Triassic succession is slightly more mature along the northern margin of the Holy Cross Mts. than along their southern part, due probably to a regional increase in the maximum burial depth during the Mesozoic. The maturity of the Permian strata at Gałęzice (southern Holy Cross Mts.) is similar to that of the Triassic rocks whereas Kajetanów (in the north) is characterised by values significantly higher and comparable to those found in wells further north. The difference cannot be accounted for solely by differential burial depths, and implies the existence of a positive thermal anomaly active before the Middle Triassic. Our investigations generally confirmed the low thermal maturity of the Triassic. However, contrary to earlier interpretations, we suggest that the maximum burial depths based on a reconstructed thickness of the post-Triassic deposits may account for the observed maturity levels, assuming that geothermal gradients in the Mesozoic were similar to today's.
Źródło:
Geological Quarterly; 2002, 46, 1; 25-36
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differences in the reconstructions of the depositional environment of overbank sediments performed using the C/M diagram and cumulative curve analyses
Autorzy:
Liro, M.
Powiązania:
https://bibliotekanauki.pl/articles/294944.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
depositional environment
C/M diagram
cumulative curve
settling velocity
Opis:
In order to compare the results of the reconstructions of depositional environment of sediments performed using the C/M diagram (Passega, Byramjee 1969) and the cumulative curve analysis (Visher 1969), 49 samples of overbank sediment were collected in the valley of the Dunajec River. The samples were collected from the fill of an abandoned channel on the floodplain of the lower Dunajec (17 km from its mouth) and from the floodplain of the Dunajec in the backwater of the Czorsztyn Reservoir and analysed used the laser diffraction and sieve methods. A cumulative curve analysis of the samples located in the fields of dominant deposition from traction in the C/M diagram (Fields I, II, III, IX) showed that the dominant type of their transport prior to deposition was saltation and suspension (81%), while traction amounted to an average of 19%. In the fields of the C/M diagram corresponding to the deposition of graded suspension under the conditions of high (Field IV) and moderate turbulence (Field V), the dominant type of sediment transport before deposition was saltation, whose amounted to 78–86% (Field IV) and 50–76 % (Field V). In the fields of the C/M diagram indicating deposition from graded suspension transported in conditions of low turbulence (VI) and uniform suspension of varied grain size (VII), the dominant type of transport prior to deposition was suspension, amounting to 35–94%. Sediments located in the field of the C/M diagram corresponding to the finest uniform suspension and pelagic suspension (Field VIII) were in 91–95% transported in suspension prior to deposition.
Źródło:
Landform Analysis; 2015, 29; 35-40
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taphonomy of the fossil insects of the middle Eocene Kishenehn Formation
Autorzy:
Greenwalt, D.E.
Rose, T.M.
Siljestrom, S.M.
Goreva, Y.S.
Constenius, K.N.
Wingerath, J.G.
Powiązania:
https://bibliotekanauki.pl/articles/22933.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
taphonomy
fossil
insect
Diptera
Hemiptera
depositional environment
Middle Eocene
Eocene
Kishenehn Formation
Opis:
The lacustrine oil shales of the Coal Creek Member of the Kishenehn Formation in northwestern Montana comprise a relatively unstudied middle Eocene fossil insect locality. Herein, we detail the stratigraphic position of the fossiliferous unit, describe the insect fauna of the Coal Creek locality and document its bias towards very small but remarkably preserved insects. In addition, the depositional environment is examined and the mineral constituents of the laminations that comprise the varves of the Kishenehn oil shale are defined. Fifteen orders of insects have been recorded with the majority of all insects identified as aquatic with the families Chironomidae (Diptera) and Corixidae (Hemiptera) dominant. The presence of small aquatic insects, many of which are immature, the intact nature of >90% of the fossil insects and the presence of Daphnia ephippia, all indicate that the depositional environment was the shallow margin of a large freshwater lake. The fossil insects occur within fossilized microbial mat layers that comprise the bedding planes of the oil shale. Unlike the fossiliferous shales of the Florissant and Okanagan Highlands, the mats are not a product of diatomaceous algae nor are diatom frustules a component of the sediments or the varve structure. Instead, the varves are composed of very fine eolian siliciclastic silt grains overlaid with non-diatomaceous, possibly cyanobacteria-derived microbial mats which contain distinct traces of polyaromatic hydrocarbons. A distinct third layer composed of essentially pure calcite is present in the shale of some exposures and is presumably derived from the seasonal warming-induced precipitation of carbonate from the lake's waters. The Coal Creek locality presents a unique opportunity to study both very small middle Eocene insects not often preserved as compression fossils in most Konservat-Lagerstätte and the processes that led to their preservation.
Źródło:
Acta Palaeontologica Polonica; 2015, 60, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Litostratygrafia, palinofacje i środowiska sedymentacji utworów triasu w północnej części niecki Nidy
Lithostratigraphy, palynofacies and depositional environments of the Triassic deposits in the northern part of the Nida Basin
Autorzy:
Fijałkowska-Mader, A.
Kuleta, M.
Zbroja, S.
Powiązania:
https://bibliotekanauki.pl/articles/2061912.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
litostratygrafia
palinofacja
środowisko sedymentacji
trias
niecka Nidy
lithostratigraphy
palynofacies
depositional environment
Triassic
Nida Basin
Opis:
W artykule przedstawiono najnowszą propozycję podziału litostratygraficznego utworów triasu północnej części niecki Nidy nawiązującego do jednostek wyróżnianych na Niżu Polskim oraz w północno-zachodnim obrzeżeniu Gór Świętokrzyskich. Podano charakterystykę petrograficzną skał tworzących zaproponowane wydzielenia. Zamieszczono także wyniki analizy palinofacjalnej utworów triasu. Opisano siedem typów palinofacji odpowiadających różnym środowiskom sedymentacji: rzecznym, jeziornym, playi, sebhy, otwartego morza i laguny. Palinofacje charakterystyczne dla środowiska rzecznego występują w utworach pstrego piaskowca środkowego, piaskowca trzcinowego (formacja stuttgarcka) oraz kajpru górnego, dla środowiska jeziornego – w utworach kajpru dolnego i piaskowca trzcinowego, dla środowiska playi – w dolnych warstwach gipsowych, dla środowiska sebhy – w recie oraz w dolnych i górnych warstwach gipsowych, dla środowiska otwartego morza – w wapieniu muszlowym i dolomicie granicznym, a dla środowiska laguny – w recie, wapieniu muszlowym górnym i dolomicie granicznym. Na podstawie wyników analizy litofacjalnej i palinofacjalnej zrekonstruowano środowisko sedymentacji utworów triasu z północnej części niecki Nidy.
The latest lithostratigraphical scheme of Triassic deposits from the northern part of the Nida Basin (southern Poland) is presented. It refers to the units distinguished in the Polish Lowlands and NW margin of the Holy Cross Mountains. Petrographic characteristics of the proposed lithostratigraphic units, and the results of palynofacies analysis are given. The identified seven palynofacies types represent a variety of depositional environments: fluvial, lacustrine, playa, sebkha, open marine and lagoonal. Palynofacies characteristic for fluvial environments were identified in the Middle Buntsandstein, Schilfsandstein (Stuttgart Formation) and Upper Keuper deposits, lacustrine environment – within the Lower Keuper and Schilfsandstein, playa environment – in the Lower Gipskeuper, sebkha environment – in the Röt as well as Lower and Upper Gipskeuper, open marine environment – within the Muschelkalk and Grenzdolomit and lagoonal environment – in the Röt, Upper Muschelkalk and Grenzdolomit. Depositional environments of the Triassic deposits have been presentedreconstructed based on the lithofacies and palynofacies analyses.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2015, 462; 83--123
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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