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    Wyświetlanie 1-6 z 6
    Tytuł:
    Stacked Gilbert-type deltas filling an incised palaeovalley along the cratonward margin of a foreland basin (Miocene, Western Carpathian Foredeep)
    Autorzy:
    Nehyba, Slavomír
    Powiązania:
    https://bibliotekanauki.pl/articles/2201216.pdf
    Data publikacji:
    2022
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Western Carpathian Foredeep
    incised valley
    Gilbert-type deltas
    stratigraphic architecture
    provenance analysis
    Opis:
    The coarse-grained Brno sands are an important groundwater aquifer and represent a volumetrically significant component of the Lower Badenian/Middle Miocene sedimentary infill of the Western Carpathian Foredeep, a foreland basin formed on the eastern margin of the Bohemian Massif in front of the Western Carpathians. The integration of core and outcrop facies analysis, summary of facies features, depositional processes and architectures, and integration of provenance analysis have led to a new depositional model for the Brno sands as the product of Gilbert-type delta systems prograding into an incised palaeovalley developed on the outer foreland basin margin. The position, shape and morphology of the palaeovalley were influenced by pre-Neogene basement faults trending NW–SE. The Gilbert-type deltas recognized can be classified as foreset-dominated with other elements subordinate. The foreset beds mainly reflect low-density turbidites, with varied but important evidence of deposits of high-density turbidity currents, cohesionless debris flows and debris falls. The thick foreset deposits show, in detail, repetitive successive prograding-retrograding episodes. These are interpreted as rapid high-frequency pulses of relative sea level change i.e. as high-frequency depositional sequences. The deltaic deposition of the Brno sands was terminated by deposits of a shoal-water delta and the sands were finally drowned by a thick pile of offshore pelagic clays. The provenance of Brno sands is located into the nearby geological units. Redeposition from the older basin infill also played an important role.
    Źródło:
    Geological Quarterly; 2022, 66, 3; art. no. 28
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of hydrocarbon potential of the Lower Palaeozoic strata in the Tarnogród–Stryi area (SE Poland and western Ukraine)
    Autorzy:
    Więcław, D.
    Kosakowski, P.
    Kotarba, M.J.
    Koltun, Y. V.
    Kowalski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191878.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    source rock
    hydrocarbon potential
    Cambrian
    Ordovician
    Silurian
    Carpathian Foredeep basement
    SE Poland
    Western Ukraine
    Opis:
    Quantity, genetic type and maturity of organic matter dispersed in the Lower Palaeozoic sequence from the Lower Cambrian to Silurian strata of the Polish and Ukrainian parts of the Carpathian Foredeep basement in the Tarnogród–Stryi area were evaluated based on the results of geochemical analyses of 475 rock samples collected from 45 wells. The best source rocks were found in the Silurian strata where the present total organic carbon (TOC) content is up to 2.6 wt%. They occur in the vicinity of Wola Obszańska, where the median of the present and the initial total organic carbon (TOC) contents in the individual wells amount to 0.98 and 1.6 wt%, respectively. The Cambrian and Ordovician strata have a poorer hydrocarbon potential and their present TOC content never exceeds 1 wt%. In all of the investigated Lower Palaeozoic strata, organic matter is represented by the oil-prone Type-II kerogen deposited in anoxic or sub-oxic conditions. The maturity of source rocks ranges from early mature (the initial phase of the low-temperature thermogenic processes) in selected zones of the Silurian strata in the vicinity of Wola Obszańska, through the middle and the final phase of “oil window” in the Ordovician and Cambrian strata in the Polish part of the study area, to the overmature stage in the Ordovician strata in the south-eastern part of the study area (Ukraine).
    Źródło:
    Annales Societatis Geologorum Poloniae; 2012, 82, 1; 65--80
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Precambrian and Palaeozoic basement of the Carpathian Foredeep and the adjacent Outer Carpathians (SE Poland and western Ukraine)
    Autorzy:
    Buła, Z.
    Habryn, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/191447.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    basement
    Carpathians
    Carpathian Foredeep
    East European Platform
    Trans-European Suture Zone
    south-eastern Poland
    Western Ukraine
    Opis:
    In south-eastern Poland and western Ukraine, the Outer Carpathian orogen and the Carpathian Foredeep developed in the foreland of the East-European Platform (Baltica). The area consists of a number of tectonic units included in the Trans-European Suture Zone (TESZ): the Łysogóry–Radom and Małopolska blocks in the territory of Poland, and the Rava Rus’ka Zone, Kokhanivka Zone and Leżajsk Massif in the Ukraine. The development of the TESZ began in the (?Middle) Late Neoproterozoic and was associated with rifting processes taking place along the western edge of the East-European Craton (Baltica) during the break-up of the Rodinia/ Pannotia supercontinent. The passive margin of Baltica evolved into the TESZ during collisional and/or strike-slip movements. In the TESZ (Małopolska Block and Leżajsk Massif), Ediacaran flysch-type siliciclastics were affected by weak metamorphism and folding during the Cadomian orogeny. The development of Cambrian deposits in the East-European Craton, Łysogóry–Radom Block, northeastern part of the Małopolska Block (Kielce Fold Belt) and in the Rava Rus’ka and Kokhanivka zones was associated with the post-rift thermal subsidence. Tectonic movements (so-called Sandomierz phase), which occurred probably due to an oblique collision of the Małopolska Block (included into the passive margin of Baltica) and the East-European Craton during late Middle Cambrian to Late Cambrian (possibly also Early Ordovician) times, resulted in the following: (1) development of stratigraphical (?erosional) gaps in the Middle and Upper Cambrian sections of the Lublin–Podlasie slope of the East-European Craton and the Kielce Fold Belt in the Małopolska Block; (2) intense tectonic subsidence of the Łysogóry–Radom Block during the deposition of Middle and Upper Cambrian sediments; (3) development of compressional folds in the Lower Cambrian to lower Middle Cambrian deposits of the Kielce Fold Belt on the Małopolska Block. Ordovician–Silurian series were deposited in a typical flexural foredeep basin, in which subsidence and deposition rates accelerated during Late Silurian (Ludlow–Pridoli) and Early Devonian (Lochkovian) times. It is postulated that the present position of the Małopolska Block relative to the Łysogóry–Radom Block and East-European Craton resulted from post-Silurian dextral movements between the Małopolska Block and the East-European Craton. Devonian–Carboniferous deposits occur only in the Małopolska Block located in the Variscan foreland. The Middle-Late Devonian and Early Carboniferous shallow-marine carbonate platforms developed under an extensional regime. The siliciclastic Upper Visean–Lower Namurian A Culm series were deposited in the flexural Variscan foreland basin. During the Late Namurian A, the Małopolska Block was uplifted in response to the build-up of compressional foreland stresses. During post-Carboniferous times, the Precambrian and Palaeozoic deposits were subject to erosion and restructuring during the Alpine orogeny.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 221-239
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facies of the Upper Jurassic–Lower Cretaceous sediments in the basement of the Carpathian Foredeep (western Ukraine)
    Autorzy:
    Krajewski, M.
    Król, K.
    Olszewska, B.
    Felisiak, I.
    Skwarczek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/191397.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    microfacies
    Upper Jurassic
    Lower Cretaceous
    SW margin of the East-European Platform
    Carpathian Foredeep basement
    Western Ukraine
    Opis:
    The Upper Jurassic–Lower Cretaceous carbonate sediments developed in a narrow, Ukrainian part of the basement of the Carpathian Foredeep show high facies diversity. Based upon thin section studies, the authors identified eleven principal microfacies varieties. Three main stages of development of carbonate platform were distinguished: (i) Oxfordian–Early Kimmeridgian, (ii) Kimmeridgian–Tithonian, and (iii) Berriasian–Valanginian. The Oxfordian sediments are rather thin and represent both the outer and inner, distally steepened ramp facies. In the Late Kimmeridgian and, mainly, in the Tithonian, the intensive growth of rimmed platform took place with distinct zones of peritidal, margin barrier and platform slope, bearing calciturbidite facies. Development of the rimmed platform was controlled by synsedimentary tectonic movements along faults rejuvenated southwest of the Holy Cross Mts. Fault Zone. In the Berriasian–Valanginian, the dominant process was sedimentation onto not-rimmed platform controlled by small sea-level changes. Both the facies development and literature data indicate that the Late Jurassic sedimentation in the Ukrainian part of the Carpathian Foredeep basement shows considerable differences in comparison to that of the Polish part. In the studied successions, large Oxfordian microbial-siliceous sponge reef complexes, known from the Polish part of the Carpathian Foredeep basement and other areas in Europe, were rare. In the study area carbonate buildups were encountered mainly in the intervals representing the Upper Kimmeridgian–Tithonian where small, microbial-sponge and microbial-coral biostromes or patch-reefs were formed. Their growth was presumably restricted to a narrow zone of the upper slope, close to ooidal-bioclastic margin platform facies. In the Polish part of the Carpathian Foredeep basement, the Late Jurassic sedimentation took place on a vast, homoclinal ramp while in the Ukrainian part it proceeded on a narrow, distally steepened ramp and rimmed platform with distinct marginal platform barrier. Similar platform facies distribution in both regions appeared mainly in the Early Cretaceous, although with some stratigraphical differences. The facies distribution of the Upper Jurassic sediments was closely controlled by the block structure of the basement and by orientation of the main, transcontinental Holy Cross Mts. Fault Zone, which supports the opinion on its activity in the Mesozoic era. The Ukrainian part of the Carpathian Foredeep basement located over the Palaeozoic Kokhanivka Block, between the Krakovets and Holy Cross fault zones, includes predominantly the slope, marginal and inner platform facies. Facies observed over the Palaeozoic Rava Ruska Block (south-western part of the East-European Platform), between the Holy Cross and Rava Ruska fault zones, represents mainly the inner platform and the peri-shore deposits.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 291-307
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozwój badań utworów miocenu w Karpatach Zachodnich na obszarze Bielsko - Kraków
    Development of research on Western Carpathian Miocene deposits in the Bielsko - Kraków area
    Autorzy:
    Moryc, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/184012.pdf
    Data publikacji:
    2005
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Karpaty Zachodnie
    zapadlisko przedkarpackie
    miocen
    litostratygrafia
    ewolucja basenu
    tektogeneza
    Western Carpathians
    Carpathian Foredeep
    Miocene
    lithostratigraphy
    basin evolution
    tectogenesis
    Opis:
    W artykule przedstawiono, w ujęciu chronologicznym, omówienie poglądów dotyczących rozwoju litostratygraficznego utworów miocenu na obszarze polskich Karpat Zachodnich. Przedstawiono również wyniki badań utworów miocenu stwierdzonych na tym obszarze w szeregu nowych wierceń. W nawiązaniu do dotychczasowych badań i nowych obserwacji przedstawiono jednolitą korelację utworów miocenu, ze szczególnym uwzględnieniem osadów dolnomioceńskich. Określono występowanie i rozprzestrzenienie wyróżnionych jednostek litostratygraficznych oraz przedstawiono ewolucję basenu mioceńskiego i jego tektogenezę. Osady mioceńskie na obszarze polskich Karpat Zachodnich tworzą zespół utworów o sumarycznej miąższości dochodzącej do około 3000 metrów. Prawie połowę tej miąższości zajmują osady dolnego miocenu. W miarę nasuwania się ku północy górotworu karpackiego, następowało przesuwanie się mioceńskiego zbiornika i wkraczanie kolejno coraz to młodszych osadów. W utworach dolnego miocenu wyróżniono formacje z Zawoi, z Suchej, ze Stryszawy, a w dolnym badenie - formacje z Jachówki, dębowiecką i skawińską
    The paper presents chronologically arranged discussion of existing views on the lithostratigraphic development of the Western Carpathian Miocene deposits as well as data from old and new boreholes in the studied area. The present author suggests the uniform stratigraphic division of the Miocene (especially Lower Miocene) deposits based on existing results and new findings. He also presents the occurrence and extent of distinguished lithostratigraphic units as well as the evolution of the Miocene basin and its tectogenesis. Miocene deposits in the Polish part of the Western Carpathians consist of thick deposit up to about 3000 meters. Almost half of these are represented by Lower Miocene deposits. The Miocene basin was moved northwards and younger deposits originated during folding processes of the Carpathian orogen. Several lithostratigraphical units were distinguished: Zawoja, Sucha and Stryszawa formations of the Lower Miocene deposits and Jachówki, Dębowiec and Skawina formations of the Lower Badenian one
    Źródło:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2005, 31, 1; 5-73
    0138-0974
    Pojawia się w:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microbial gas system and prospectives of hydrocarbon exploration in Miocene strata of the Polish and Ukrainian Carpathian Foredeep
    Autorzy:
    Kotarba, M. J.
    Peryt, T. M.
    Koltun, Y. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/191552.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    microbial gas
    thermogenic gas
    source rocks
    hydrocarbon potential
    organic geochemistry
    prospectives of hydrocarbon exploration
    autochthonous Miocene strata
    Bilche-Volytsia Unit
    Carpathian Foredeep
    SW Poland
    Western Ukraine
    Opis:
    Molecular composition of natural gases accumulated in autochthonous Miocene strata of the Polish and Ukrainian Carpathian Foredeep is dominated by methane, which usually constitutes over 98 vol%. Methane was generated by the carbon dioxide reduction pathway of microbial processes. Ethane was generated both during microbial and thermogenic processes ("oil window") and propane at the initial stage of the low-temperature thermogenic processes, and also by the microbial processes. The rhythmic and cyclic deposition of Miocene clays and sands as well as the vigorous generation of microbial methane caused that the gas produced in claystone beds was accumulated in the overlaying sandstones, and capped, in turn, by the succeeding claystones. Such generation and accumulation system of microbial gases gave rise to the formation of multi-horizontal gas fields. Analysis of the distribution of immature humic dispersed organic matter in the Upper Badenian and Lower Sarmatian sequences indicates that it is practically homogeneous. A migration range of microbial gases was insignificant and locations of their accumulations would depend only on the existence of proper type of traps (compactional anticlines situated above basement uplifts, sealed by the Carpathian Overthrust and/or by faults; stratigraphic pinching out and stratigraphic traps related to unconformities). Another situation is encountered in the south, beneath the Carpathian Overthrust. The thickness of the autochthonous Miocene strata in this area is more than 1,500 metres. Geochemical studies reveal that from a depth of 2,500 metres starts the process of low-temperature thermogenic hydrocarbon generation (“oil window”). At greater depths, more than 7,500 metres, within the autochthonous Lower Miocene basin only the high-temperature methane ("gas window") could be produced and accumulated.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 523-548
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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