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Content available Katalog basenów sedymentacyjnych Polski
PL
Na obszarze Polski wyróżniono 48 basenów sedymentacyjnych obejmujących utwory od ediakaru po pliocen. Opierając się głównie na dostępnych opracowaniach publikowanych, w tym kartograficznych, określono granice basenów, stosując oprogramowanie ArcGIS, a także zestawiono krótkie opisy poszczególnych jednostek. W opisach zarysowano ich zasadnicze cechy: plan strukturalny, wiek wypełnienia osadowego i jego charakterystykę, powierzchnię wychodni, zasięg regionalny na tle elementów tektoniki i paleogeografii oraz genezę. Baseny zaliczono do czterech ogólnych kategorii regionalnych: epikontynentalne (24), włączone w górotwór (14), śródgórskie (4) i związane z terranami (6). Większość opisanych jednostek (32) należy do basenów wychodzących poza granice Polski. Powierzchnia wychodni basenów (w granicach kraju) mieści się w szerokim zakresie: od 11 km2 (basen zgorzelecki) do 284 761 km2 (mezozoiczny basen Niżu Polskiego), przy średnim obszarze 27 290 km2. Nieliczne baseny (w zależności od interpretacji podłoża: 9–15) są rozwinięte bezpośrednio na fundamencie krystalicznym, znaczna większość została nałożona na jednostki powstałe wcześniej, nierzadko w wyniku reaktywacji dawniejszych ram tektonicznych. Głównie na podstawie prac publikowanych przedstawiono zarys genezy poszczególnych basenów, a także wstępnie zaliczono je do ośmiu kategorii genetycznych: obrzeże pasywne, pasmo fałdowo-nasuwcze, basen: przedgórski, przedłukowy, pull-apart, śródkratoniczny, ryftowy i załukowy. Baseny poligenetyczne, o wieloetapowej historii rozwoju, zaliczono do kategorii odnoszącej się do etapu inicjacji basenu. Luki w rozpoznaniu niektórych opisanych basenów sprawiają, że w miarę dopływu nowych materiałów badawczych może ulec zmianie ich definicja, ewentualnie nastąpi ich wewnętrzny podział regionalny lub stratygraficzny, czy też połączenie z sąsiednimi jednostkami.
EN
The catalogue provides description of 48 sedimentary basins from the territory of Poland, comprising deposits from Ediacaran to Pliocene. Basin boundaries in the Arc GIS format, as well as short descriptions of particular units, have been based mainly on published data, including cartographic materials. Descriptions include essential characteristics such as: structural plan, age and general features of a sedimentary fill, regional extent against tectonic and paleogeographic boundaries, and brief genetic considerations. The basins were ascribed to four general regional categories: epicontinental (24 units), incorporated in an orogen (14), intramontane (4), and associated with allochthonous terranes (6). The basin area, defined here as the present area of outcrops or subcrops, ranges from 11 km2 (Zgorzelec Basin) to 284,761 km2 (Mesozoic Basin of the Polish Lowlands), with a mean of 27,290 km2. Most of the described units (32) extend beyond the Polish territory into surrounding countries. Some basins (depending on the basement interpretation: 9-15) are developed directly on a crystalline basement. Majority of basins onlap earlier units, commonly due to reactivation of the pre-existing tectonic framework. A brief review of mechanisms that led to basin formation allowed the authors to ascribe the units to eight genetic categories: passive margin, fold-and-thrust belt, foreland, fore-arc, pull-apart, intracratonic, rift, and back-arc basins. In several instances of polygenetic (polyhistory) basins they were included to a category corresponding to the initial stage of basin development. The present study pinpoints some gaps in our knowledge of particular basins. Once filled, they may lead to changes in basin concepts and definitions, and also to their further subdivision or, conversely, unification.
EN
The well-known fossiliferous and lithologically variable clay-carbonate series in the Łysogóry Region (northern part of the Holy Cross Mts, central Poland), enclosed between the Middle Devonian Amphipora dolomites and limestones (Kowala Formation) and siliciclastics (Świętomarz Beds), is defined formally as the Shaly-Calcareous Skały Formation. This Upper Eifelian to Middle Givetian, ca. 250–280 m thick unit, consists of marly and clay shales, interbedded many times with various limestone types (including encrinite and biohermal varieties), as well as with marls and siltstones. Its diagnostic feature is the presence of variable skeletal accumulations, formed by exceptionally numerous, well-preserved and diverse macrofauna (including brachiopods, corals, crinoids, bryozoans), described since the 19th century. The stratotype is located in the eastern slope of the Dobruchna stream near the Skały village and belongs to the Silurian to Upper Devonian Grzegorzowice-Skały section. Compared to the previously used term, Skały Beds sensu Pajchlowa (1957), the lower boundary is redefined, owing to a new exposure in the active Skała Quarry, and placed higher, at the base of the famous brachiopod shales (set XIV of Pajchlowa), instead of the formerly accepted lower boundary at the base of set XIII. Set XIV is formally distinguished as the Dobruchna Brachiopod Shale Member. The higher part of the Skały Fm (sets XV–XXVA) is not subdivided further, as the poorly exposed succession, including in particular the type area, precludes a more accurate recognition of lithological variability. The upper boundary of the Skały Fm is placed at the top of set XXV sensu Pajchlowa (1957), corresponding to the boundary between subsets XXVA and XXVB sensu Malec and Turnau (1997). A hypostratotype of the upper boundary is selected in the outcrop M0 at Miłoszów, 2.5 km westwards from the type section, allowing recognition of the diachroneity of lithological change defining the transition from the Skały Fm to Świętomarz Beds. A borehole situated in a key location would be an obvious next step in the further elucidation of the stratigraphic sequence of the Łysogóry Region.
EN
New conodont data provide further constraints on the occurrence of the Devonian-Carboniferous boundary in the Kule section through the carbonate Novchomok Formation (Kitab Reserve, Uzbekistan). The stratigraphically condensed section includes the interval from the uppermost Famennian Pseudopolygnathus granulosus-lowermost Protognathodus kockeli zones to the middle Tournaisian Siphonodella crenulata Zone. In addition to revision of earlier published taxonomic and biostratigraphic data, two previously unreported taxa are described: Polygnathus sp. n. A and a peculiar form probably representing a new genus (gen. et sp. indet.). The biofacies analysis documents a succession of polygnathid, siphonodellid-polygnathid, polygnathid-siphonodellid to polygnathid-bispathodid, and again polygnathid-siphonodellid biofacies. The generic composition of the samples and relative abundance of Polygnathus purus reflect deep marine environments of the continental slope and rise.
EN
An earlier concept of the Variscan foreland in Poland (Narkiewicz, 2007) is reconsidered in the light of new stratigraphic, tectonic and geophysical evidence, providing new data on Devonian sedimentation, Carboniferous magmatism and the deep crustal structure of SE Poland. Regional comparisons with the tectonic evolution of Central Europe and the Black Sea region show that the subsidence pattern in the foreland was controlled by alternating phases of accelerated convergence and tectonic standstill along the southern margin of Euramerica. In particular, the Bretonian (Devonian/Carboniferous) compressional deformation resulted from intensified orogenic convergence in the West-Central European Variscides leading to closure of the Saxo-Thuringian Basin and East-Sudetic back-arc basin. Another turning point in the regional tectonosedimentary development around the Mississippian-Pennsylvanian boundary was probably related to the termination of terrane collision in the Black Sea region. Late Pennsylvanian basin inversion was associated with a roughly N-S tectonic shortening. This was partly due to displacement along pre-existing basement discontinuities comprising reactivated Caledonian sutures that also pre-determined the Devonian-Carboniferous basin boundaries. Consequently, deeply-rooted tectonic zones, including the Kraków-Lubliniec and Holy Cross faults and the Teisseyre-Tornquist Zone, focussed maximum compressional and transpressional deformation and associated uplift. Such a concept of terminal Variscan tectonism, termed here the “decoupled model”, is discussed with reference to the recently proposed “coupled model”. The latter assumes a wide extent of the Variscan Orogen, reaching as far as the marginal Radom-Kraśnik Fold-and-Thrust Belt linked with the Bohemian Massif through a major basal detachment. It is concluded that the “decoupled model” is more consistent with the documented seismic and structural evidence as well as with the present knowledge of the heterogeneous pre-Devonian basement in southern Poland.
PL
Państwowy Instytut Geologiczny został utworzony w 1919 r. jako polska służba geologiczna. Od tego czasu Instytut odgrywał czołową rolę w badaniach regionalnych głębokiej struktury geologicznej kraju. Ich głównym celem było stworzenie podstaw naukowych do poszukiwań i wydobycia surowców mineralnych, a także dla innych dziedzin geologii stosowanej, takich jak hydrogeologia i geologia środowiskowa. Wpływ na przebieg tej działalności miała skomplikowana historia Polski w ostatnich 100 latach, w której okresy dobrej sytuacji gospodarczej i korzystnych perspektyw dla prac geologicznych przeplatały się z czasami kryzysu gospodarczego i politycznego. Niezależnie od tych okoliczności zewnętrznych geolodzy i geofizycy PIG nieustannie poszerzali wiedzę o geologii Polski w trakcie licznych badań, których wyniki publikowano w tysiącach artykułów, monografii, map i atlasów. Instytut wnosił też wkład do geologii europejskiej uczestnicząc w różnych międzynarodowych projektach badawczych i ich wysoko ocenianym dorobku publikacyjnym.
EN
Polish Geological Institute was established in 1919 as the geological survey of Poland. Since then the Institute has been playing the leading role in regional studies of the country’s subsurface geology and deep structure. The main aim has been to provide a scientific basis for mineral exploration and production, and also for other fields of applied geology such as hydrogeology and environmental aspects. These activities were influenced by a complicated history of Poland during the past 100 years with periods of better prospects for economy and geology alternating with times of economic and political crisis. Regardless of these external circumstances the geologists and geophysicists of the PGI have been constantly expanding knowledge of the geology of Poland by numerous studies resulting in thousands of published articles, monographs, maps and atlases. The Institute also contributed to the geology of Europe by participating in various international research projects whose results appeared in highly rated publications.
EN
Concepts prevailing among the Polish geoscientists during the last decades assumed that the Teisseyre-Tornquist Zone is a major tectonic discontinuity separating the pre-Ediacaran East European Craton (EEC) crust from the Paleozoic Platform composed of terranes accreted during the Caledonian and Variscan orogenic processes. The recent interpretations of the TTZ by Mazur and collaborators, basedon gravity modelling and new PolandSPAN seismic reflection data, revive earlier ideas of the EEC crust extending to the western Poland and NE Germany. These authors propose that the TTZ is in fact a Sveconorwegian (ca. 1 Ga old) collisional suture marked by a crustal keel expressed as the Pomeranian and Kuiavian gravity lows in northern and central Poland. However, the present review of seismic data available, as well as a closer evaluation of the modelling results, do not confirm the keel/suture concept. On the other hand, the idea of the TTZ as an Early Paleozoic tectonic discontinuity is supported by several lines of evidence, including a strong regional magnetic gradient and a contrast in the crustal structure. The latter is revealed by seismic velocity distribution from the refraction data, in the results of magnetotelluric profiling and in recent seismicity patterns. The interpretation of the PolandSPAN data attempting to prove the continuity of the cratonic crust and its Ediacaran-Lower Paleozoic cover across the TTZ appears questionable. At the same time the POLCRUST-01 deep seismic profile in SE Poland documents that the zone is associated with the subvertical Tomaszów Fault. The basement top displacement by ca. 0,5 km and associated change in its slope are related to the fault whose deep crustal roots are further documented by reflectivity patterns in the lower crust. The recent modelling exercise by Krzywiec and collaborators aimed at questioning the thick-skinned nature of this fault does not present compelling results, being based on a poorly constrained geological model. The general conclusion from the present review is that the recently published data either support or at least do not contradict the concept of the TTZ as a tectonic zone separating the continuous EEC crust from several allochtonous blocks - mostly proximal Early Paleozoic terranes to the south-west. Thelithospheric memory of the TTZ echoed in successive stages of its reactivation in different intra-plate tectonic regimes - transpressive Variscan, mostly extensional or transtensional Permian through Early Cretaceous, compressional Late Cretaceous and finally Neogene, related to the Carpathian orogenic compression.
EN
Polish Geological Institute was established in 1919 as the geological survey of Poland. During its entire history the Institute has been playing the leading role in regional geological studies, including the country’s subsurface geology and deep structure, to provide scientific basis for mineral exploration and production, and also for other fields of applied geology. These activities were strongly influenced by the complicated history of Poland during the past 100 years with periods of economic and political crisis interwoven with times of better prospects for economy and geology. Regardless of these external circumstances, the geologists and geophysicists of the PGI have constantly been expanding the knowledge of the geology of Poland by publishing thousands of contributions in the form of articles, monographs, maps and atlases. The Institute also contributed to the geology of Europe by participating in various international research projects that resulted in highly rated publications.
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