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    Wyświetlanie 1-7 z 7
    Tytuł:
    Ksylity w kenozoicznych osadach drobnokrystalicznych z odkrywek KWB Konin S.A. i KWB Adamów S.A.
    Xylites in the cenozoic fine-grained deposits from the Konin and Adamów lignite opencasts
    Autorzy:
    Widera, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/170151.pdf
    Data publikacji:
    2012
    Wydawca:
    Poltegor-Instytut Instytut Górnictwa Odkrywkowego
    Tematy:
    kopalnie węgla brunatnego
    basen sedymentacyjny
    ksylity
    kenozoik
    lignite mines
    sedimentation basin
    xylites
    Cenozoic
    Opis:
    Fragmenty kopalnego drewna wśród osadów drobnoziarnistych są spotykane w wielkopolskich odkrywkach węgla brunatnego. Obecność ksylitów w osadach neogeńskich udokumentowano w odkrywkach Kazimierz N i Drzewce (KWB Konin S.A.), a pochodziły prawdopodobnie ze stropowych części niżej zalegających torfów i/lub z roślinności porastającej brzegi basenu sedymentacyjnego.
    Fragments of fossil wood among fine-grained deposits are found in Wielkopolska lignite opencasts. The presence of xylites in Neogene sediments have been documented in the opencasts Kazimierz N and Drzewce (Konin Lignite Mine), and Paleogene sediments in the opencast Koźmin N (Adamów Lignite Mine). Fragments of wood, which later became xylites, probably came from the upper part of the lower lying peat and/or from the vegetation growing in the areas surrounding the sedimentary basin.
    Źródło:
    Górnictwo Odkrywkowe; 2012, 53, 1-2; 119-122
    0043-2075
    Pojawia się w:
    Górnictwo Odkrywkowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Triassic palaeogeography of NE Bohemian Massif based on sedimentological record in the Wleń Graben and the Krzeszów Brachysyncline (SW Poland)
    Autorzy:
    Kowalski, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/1836356.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    fluvial sedimentation
    Buntsandstein
    Polish Buntsandstein Basin
    Triassic Germanic Basin
    epi-Variscan cover
    Bohemian Massif
    Opis:
    This paper presents a new sedimentological and palaeogeographic interpretation of the Early to Middle(?) Triassic continental deposits in the Wleń Graben and the Krzeszów Brachysyncline (Sudetes, SW Poland). These two tectonic subunits, located in the peripheral segments of the North Sudetic and Intra-Sudetic synclinoriums, respectively, represent the crucial elements for deciphering the post-Variscan palaeogeographic evolution of the NE termination of the Bohemian Massif. Sedimentological studies and facies analysis show that the Early Triassic siliciclastic deposition in both areas was dominated by fluvial sedimentation of the typical Buntsandstein facies within a gently sloping alluvial plain, locally followed by ephemeral lake environments in the late Early or Middle(?) Triassic. The lithofacies and the measured palaeocurrent directions indicate that the area was drained by braided streams flowing towards the northwest and north. Individual fluvial channels had depths not exceeding 1 m and widths of up to a few metres. Overbank deposits are poorly preserved due to the lateral shifting of channels. Based on available borehole data, an analysis of isopach maps was performed for the first time in the study areas. The study areas are presently separated by crystalline units devoid of sedimentary rocks, but the analysis indicate that they might have been in constant or periodical connection during the Triassic. It is concluded that the present-day extent of Triassic deposits is a result of the primary basin configuration combined with the Middle Triassic to Late Cretaceous erosion and post-Cretaceous tectonic uplift. The paper summarizes the present state of research on the continental Triassic preserved in the terminal parts of the North Sudetic and Intra-Sudetic synclinoriums, presents the first detailed sedimentological logs, and proposes new palaeogeographic interpretation. New findings include bioturbation structures, such as plant-root traces or tunnels formed by invertebrates and possible tetrapod footprints, which shed new light on the sedimentological interpretation of the continental Mesozoic deposits in the NE part of the Bohemian Massif.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2020, 90, 2; 125-148
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Controls on basal Zechstein (Wuchiapingian) evaporite deposition in SW Poland
    Autorzy:
    Dyjaczyński, K.
    Peryt, T. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060060.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Zechstein Basin
    evaporites
    3D seismics
    lithofacies
    sedimentation
    anhydritization
    SW Poland
    Opis:
    The development of basal Zechstein (Wuchiapingian) strata inSW Polandindicates the existence of a diversified relief inherited after the flooding of the pre-existing depression by the transgressing Zechstein sea. The deeper parts of the basin were the place of development of thin basinal Zechstein Limestone showing sedimentary condensation manifested by bored and encrusted grains and thick evaporites (mostly halite), and in shallow parts Zechstein Limestone reefs followed by thinner evaporite sequences (dominated by anhydrite) occur. The analysis of 3D seismic sections showed that instead of three conventionally recognized evaporite units of stratigraphic potential in the PZ1 cycle, five units occur (from the base to the top: Lower Anhydrite, Lower Oldest Halite, Middle Anhydrite, Upper Oldest Halite, Upper Anhydrite). In a particular place their number may vary from two (Lower Anhydrite at the base of the PZ1 cycle and Upper Anhydrite at the top of the PZ1 cycle) to five. There are two complexes of Lower Anhydrite occurring throughout the platform and basinal zones showing deepening-upward (transgressive) trend. The halite sedimentation in the deepest parts of salt basins began shortly after the deposition of the upper Lower Anhydrite complex while in the sulphate platform areas the sulphate deposition lasted still for a long time. The Lower Oldest Halite deposits occur in the depressions. Between the halite basins, anhydrite platforms occur, and the thickness of anhydrite platform deposits is smaller than it is observed in salt basins. The Upper Oldest Halite in turn is recorded above the anhydrite platform. The two halite units represent different phases of development of halite basins. The Lower Oldest Halite basins are related to the pre-Zechstein depressions, although in some cases their syndepositional subsidence was controlled by reactivation, during the deposition of basal Zechstein strata, of former faults. In turn, the Upper Oldest Halite basins used the accommodation space created due to anhydritization of the Lower Anhydrite deposits composed originally of selenitic gypsum. The 3D seismics evidences that the PZ1 evaporites inSW Polandhave been deposited in far more complex and dynamic system than it was assumed before.
    Źródło:
    Geological Quarterly; 2014, 58, 3; 485--502
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial variability of recent sedimentation rates in the Eastern Gotland Basin (Baltic Sea)
    Autorzy:
    Hille, S.
    Leipe, T.
    Seifert, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/48484.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    hydrography
    Gotland Basin
    sediment accumulation
    spatial variability
    sedimentation rate
    Baltic Sea
    Opis:
    In order to study recent sedimentation rates in the Eastern Gotland Basin, 52 short sediment cores collected from the deepest part (<150 m)of the Basin in 2003 were investigated. The upper parts of all the cores were distinctly laminated and dark in colour, followed by a homogeneous, greyish lower part. The thickness of the laminated sequences varied from 17 to 300 mm. 210Pb dating analyses of selected cores revealed that the change from non-laminated to laminated sediments happened about 100 years ago, indicating a shift from predominantly oxic bottom water conditions to anoxic conditions. Used as a time marker, this shift in the sediment texture enabled sediment accumulation rates to be estimated for all sediment cores. The observed mean linear sedimentation rate for the whole basin was 0.93 ± 0.67 mm yr−1. The respective bulk sediment accumulation rates ranged from 10.5 to 527 g m−2 yr−1 with an average of 129 ± 112 g m−2 yr−1, indicating a high spatial variability of sedimentation rates within the basin. This agrees very well with the long-term sedimentation pattern since the Litorina transgression. The observed pattern clearly reflects the hydrographic conditions at the seafloor as studied by modelled near-bottom current velocities.
    Źródło:
    Oceanologia; 2006, 48, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sedymentacja osadów węglonośnej sukcesji Górnośląskiego Zagłębia Węglowego : kierunki badań i aktualny stan wiedzy
    Sedimentation of the coal-bearing succession in the Upper Silesia Coal Basin: research trends and the current state of knowledge
    Autorzy:
    Gradziński, R.
    Doktor, M.
    Kędzior, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074364.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    sedymentologia
    węglonośna sukcesja
    Górnośląskie Zagłębie Węglowe
    sedimentation
    coal-bearing succession
    Pennsylvanian
    Upper Silesian Coal Basin
    Polska
    Opis:
    The coal-bearing succession in the Upper Silesia Coal Basin consists of molasse deposits filling a flexural foredeep basin. Analysis of lithofacies in cores from deep boreholes revealed the presence of depositional environments typical of alluvial plains and coastal (in a broad sense) environments. Accumulation compensated regional subsidence, so that general depositional surface remained nearly flat. The higher part of the csuccession was laid in fluvial systems, while the lower part mostly in fluvial systems and subordinately in complex coastal systems. Reconstruction of depositional architecture has shown lateral variation in thickness and extent of individual lithosomes, and also pointed to the role of peat-compaction control in shaping their 3D geometry. Sedimentation was controlled by both autigenic and allogenic factors.
    Źródło:
    Przegląd Geologiczny; 2005, 53, 9; 734-741
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geodynamiczne i tektoniczne uwarunkowania ewolucji basenów przedgórskich, z odniesieniami do zapadliska przedkarpackiego
    Geodynamic and tectonic control on evolution of foreland basins, with references to the Carpathian Foredeep Basin
    Autorzy:
    Krzywiec, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074463.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    miocen
    basen przedgórski
    system osadowy
    budowa geologiczna
    zapadlisko przedkarpackie
    foreland basin
    continental collision
    fold-thrust belts
    lithospheric flexure
    syn-tectonic sedimentation
    Carpathian Foredeep
    Miocene
    Opis:
    Main geodynamic and tectonic mechanisms responsible for evolution of foreland basins and their sedimentary infill are discussed. They include flexure of the lower lithospheric plate and its extension, growth of the orogenic wedge and sedimentation / erosion within the foreland basin. Recently formulated models of foreland basin system include four major depositional zones that are characterised by various tectono-sedimentary processes. Of particular importance for evolution of foreland basins is very complex interplay of tectonics and sedimentation, and significant lateral shift of tectonic and depositional zones. Evolution of frontal part of the orogenic wedge could be deciphered using growth strata i.e. depositional sequences formed in vicinity of growing thrust-related structures. Certain aspects of Miocene (Late Badenian–Sarmatian) evolution of the Polish Carpathian foredeep basin are discussed in a context of presented models of foreland basins.
    Źródło:
    Przegląd Geologiczny; 2006, 54, 5; 404-412
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neogene activity of the Outer Carpathians recorded by thrust-top basin deposits – an example from the Rzeszów area, Poland
    Autorzy:
    Uroda, Joanna
    Powiązania:
    https://bibliotekanauki.pl/articles/138906.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Skole thrust sheet
    foreland thrusts
    hinterland thrusts
    Outer Carpathian fold-and thrust belt
    basin inversion
    depocentre migration
    syntectonic sedimentation
    płaszczowina skolska
    Karpaty Zewnętrzne
    migracja depocentrów
    sedymentacja
    Opis:
    The Rzeszów thrust-top basin was formed on the active Skole thrust sheet of the Outer Carpathian fold-and-thrust belt and filled with Miocene syntectonic sediments. New seismic 3D, well and field data were used to define the relationship between sedimentation and tectonic activity and to establish the synkinematic context of the Rzeszów basin-fill architecture. The basin evolution was controlled by the activity of the Carpathian frontal thrust and hinterland thrusts developed in the forelimbs of folds in the Skole thrust sheet, bounding the basin from the north and south, respectively. The activity of the frontal thrust resulted in hinterland-directed depocentre migration and tilting of the syntectonic stratigraphic sequence. Balanced cross-sections have indicated that during the last compressive stage of deformation, the syntectonic deposits filling the basin were shortened by c. 5%, which resulted in the formation of folds and contractional faults. The architecture of the syntectonic deposits and the development of contractional structures reflect the activity of thrusts bounding the basin during compressive deformation of the Carpathian orogenic belt.
    Źródło:
    Acta Geologica Polonica; 2020, 70, 1; 79-96
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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