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Wyświetlanie 1-6 z 6
Tytuł:
Jeszcze raz o terranach w Polsce i ich wędrówce
Once again about terranes in Poland and their wandering
Autorzy:
Nawrocki, J.
Powiązania:
https://bibliotekanauki.pl/articles/2075320.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
paleogeografia
ewolucja tektoniczna
terrany
Polska
paleogeography
tectonic evolution
terranes
Polska
Opis:
Results of interdisciplinary studies conducted until now lead to a univocal conclusion that Poland should be regarded as a collage of terranes of different ages and provenances of the basement, and different amalgamation and accretion scenarios. Geophysical and tectonic-structural investigations have allowed defining, with different accuracies, the boundaries between particular terranes. Terranes located in the area of Paleozoic platform were subjected to two or three phases of mobility. The first phase of transcontinental scale was manifested by large-scale tectonic transport during rebuilding of global paleogeography. The second mobility phase of regional scaleaffected the Teisseyre-Tornquist terrane assemblage and was linked with the Laurentia and Avalonia collision. This process put in motion the escape tectonics in the earliest Devonian. As its result, some of terranes were reshuffled during their tectonic transportation in the SE direction. The third, Carboniferous phase of mobility of only local scale was related mainly to the dextral strike-slip tectonic activity. Unfortunately, in the case of several tectonostratigraphic units, an answer to the questions concerning their initial location and way of migration is still impossible. It is valid also in the case of the Teisseyre-Tornquist terrane assemblage, now located to the SE of the Moravia and Grójec fault zones. This reticence in geological diagnosis occurs in spite of generally good access to the rocks of the Brunovistulia and Małopolska terranes that could contain substantial information about the earliest stages of evolution of these units. In order to eliminate numerous gaps in our knowledge about the Polish terranes a new interdisciplinary scientific program should be developed.
Źródło:
Przegląd Geologiczny; 2015, 63, 11; 1272--1283
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geological setting and Ediacaran–Palaeozoic evolution of the western slope of the East European Craton and adjacent regions
Autorzy:
Poprawa, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/191938.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Lower Palaeozoic
Ediacaran
Baltic Basin
Lublin-Podlasie Basin
geological map
geological cross-section
tectonic evolution
Opis:
A set of geological maps and geological cross-sections was prepared to document the geological setting of sedimentary basins developed on the western slope of the EEC and adjacent areas to the west. On the basis of these data and literature on the subject, the evolution of the sedimentary basins in the study area was reviewed, with special emphasis on the Ediacaran–Lower Palaeozoic basin. The basin originated during late Ediacaran rifting, related to the latest stages of breakup of the Precambrian super-continent Rodinia/Pannotia, associated with large-scale igneous activity. The rifting ultimately led to the formation of the Tornquist Ocean and subsequently, during the latest Ediacaran to Middle Ordovician, the SW margin of the newly formed Baltica became a passive continental margin. The upper Cambrian depocentre in the Biłgoraj-Narol Zone and the Łysogóry Block tentatively is interpreted as a small, narrow foredeep, related to the docking of the Małopolska Block to the western margin of Baltica. From the Late Ordovician through the Silurian, a gradual change to a collisional tectonic setting is observed across the entire SW margin of Baltica, as well as in the zones adjacent to it from the west, which together became the site of development of the extensive Caledonian foredeep basin, related to the convergence and collision of Avalonia and Baltica. The oblique character of the collision resulted in a prominent diachronism in the development of the foredeep basin. This refers to the initiation of basin subsidence, the starved basin phase, the main phase of rapid subsidence and supply of detritus from the west, and the termination of basin development. The Early Mississippian (Bretonian) phase of uplift and erosion and, to a lesser degree, also the Late Pennsylvanian one significantly affected the structure of the western EEC. During the Mississippian, extensive magmatic activity took place at the SW margin of East European Craton, in the region referred to here as the Baltic-Lublin Igneous Province.
Źródło:
Annales Societatis Geologorum Poloniae; 2019, 89, 4; 347-380
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ewolucja rowu tektonicznego Nasielsk–Dębe w kredzie
Evolution of the Nasielsk–Dębe Graben (Eastern Central Poland) during Cretaceous times
Autorzy:
Leszczyński, K.
Powiązania:
https://bibliotekanauki.pl/articles/2061855.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
kreda
ewolucja tektoniczna
cykle sedymentacyjne
rów Nasielsk–Dębe
Cretaceous
tectonic evolution
sedimentary cycles
Nasielsk–Dębe Graben
Opis:
Badania nad kredową ewolucją rowu tektonicznego Nasielsk–Dębe oparto na danych z otworów wiertniczych Dębe 1, 2, 5, 6, i 7 oraz Nasielsk 1 i 2. W analizie profili otworów wiertniczych wykorzystano tylko krzywe pomiarów geofizycznych oraz materiały archiwalne (opisy rdzeni wiertniczych) i publikowane, ponieważ nie zachowały się rdzenie z tych otworów. Na podstawie analizy miąższościowej zaprezentowano etapy rozwoju rowu w kredzie i skorelowano je z cyklami depozycyjnymi. Zaobserwowano większe różnice miąższości poszczególnych pięter i ogniw po obu stronach północno-wschodniego uskoku rowu, co świadczy o jego większej aktywności w stosunku do południowo-zachodniego uskoku, zasadniczo w ciągu całej kredy. Stwierdzono istnienie przynajmniej dwóch powierzchni nieciągłości (reprezentowanych być może przez powierzchnie twardych den): na granicy kampan/mastrycht i na granicy dolny/górny mastrycht. W obrębie cyklu niższego rzędu K4-IV zaproponowano wyodrębnienie dwóch osobnych cykli najniższego rzędu: K4-IVa korelowanego w przybliżeniu z późnym wczesnym mastrychtem i K4-IVb odpowiadającego przypuszczalnie wczesnemu późnemu mastrychtowi.
The paper portrays the geological evolution of the Nasielsk–Dębe tectonic graben during Cretaceous times. The analysis is based on data from the Dębe 1, 2, 5, 6, and 7 and Nasielsk 1 and 2 boreholes. Only well logs, archived borehole materials (drill core description) and published data have been used because the drill cores are no longer available. The graben’s Cretaceous evolutionary stages have been identified based on thickness analysis, and correlated to depositional cycles. The analysis shows that greater thickness gradients are observed at the north-eastern graben-bounding fault, which indicates its higher activity compared to the south-western fault throughout nearly the entire Cretaceous. The upper part of the Cretaceous succession reveals the presence of at least two discontinuity surfaces (possibly even hardgrounds): approximately at the Campanian/Maastrichtian boundary, and near the lower Mastrichtian/upper Maastrichtian boundary. It is suggested to distinguish two separate lowest-order cycles within the lower-order cycle K4-IV: cycle K4-IVa correlated approximately with the late early Maastrichtian, and cycle K4-IVb corresponding roughly to the early late Maastrichtian.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2017, 470; 49--62
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The tectonic evolution of Lake Eğirdir, West Turkey
Autorzy:
Karaman, M. Erkan
Powiązania:
https://bibliotekanauki.pl/articles/94573.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
tectonic evolution
Lake Eğirdir
Isparta Angle
rotation
South-western Anatolian Fault
Burdur-Fethiye Fault Zone
Miocene-Pleistocene
ewolucja tektoniczna
jezioro Eğirdir
rotacja
Opis:
Lake Eğirdir is one of the most important fresh-water lakes of Turkey. It has a tectonics-related origin. The area formed under a roughly N-S compressional tectonic regime during the Middle Miocene. The stresses caused slip faults west and east of Isparta Angle, and the lake formed at the junction of these faults. The area subsided between normal faults, thus creating the topographic condition required for a lake. The lacustrine sediments have fundamentally different lithologies. After the Late Miocene, central Anatolia started to move westwards, but western Anatolia moved in a SW direction along the South-western Anatolian Fault , which we suggest to have a left lateral slip, which caused that the Hoyran Basin moved t7 km towards the SW and rotated 40º counterclockwise relative to Lake Eğirdir.
Źródło:
Geologos; 2010, 16, 4; 223-234
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quaternary evolution of a Carpathian Foothills area: An example from the East Carpathians of Poland
Autorzy:
Zuchiewicz, W.
Zasadni, J.
Powiązania:
https://bibliotekanauki.pl/articles/191928.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Quaternary sediments
tectonic geomorphology
neotectonic evolution
Polska
Opis:
The East Carpathian Foothills of Poland witnessed two episodes of relief planation in the Pliocene, followed by formation of Early Pleistocene strath terraces preserved on flat-topped meander spurs in the San River valley at altitudes of 100-120 m above recent floodplains. In the following stages, intense erosion produced of a flight of strath terraces that are provisionally dated to the Narevian or Sanian-1 (Menapian or Elsterian-1; 75-80 m), Sanian-2 (Elsterian-2; 40-60 m), Odranian and Wartanian (Drenthe, Warthe; 20-30 m), and Vistulian (Weichse- lian; 8-16 m) times. During glacial stages, solifluction deposits mantled the feet of gentle slopes being coeval with fluvial deposition and accumulation of loesses and loess-like sediments on either side of the San River valley, particularly intense in the Weichselian. Interglacial warmings fostered downcutting of the pre-existing fluvial sediments as well as formation of fossil soils within loess sequences and deposition of peat in abandoned channels. In the Late Pleistocene and at the beginning of the Holocene, diversified tectonic movements took place leading to displacement of Weichselian and Holocene straths. During the Holocene, in turn, cut-and-fill terrace steps were shaped, organogenic sediments filled abandoned channels and oxbow lakes, and slopes became re-modelled by landslides and slopewash. The pattern of different types of relief, together with spatial distribution of topolineaments and some photolineaments in the eastern portion of the Polish Outer Carpathians, has been shaped due to mutual interactions between climatic, lithologic and tectonic factors. Well-pronounced topolineaments either follow fault-related zones of weakness, are associated with dense network of extensional cross-fold joints, or indicate recent reactiva-tion of some faults and/or joint sets.
Źródło:
Annales Societatis Geologorum Poloniae; 2010, 80, No 3; 327-345
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Oświno structure (NW Mid-Polish Trough) - salt diapir or inversion-related compressional structure?
Autorzy:
Krzywiec, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059897.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Mid-Polish Trough
Mesozoic
extension
inversion
salt structures
decoupled evolution
syn-tectonic sedimentation
Opis:
Interpretation of seismic data from the Pomeranian segment of the Mid-Polish Trough (MPT) shows that this part of the MPT evolved in Mesozoic times as a decoupled sedimentary basin. Regional-scale decoupling was caused by the thick Zechstein salt layer. Detailed tectonic and seismostratigraphic analysis of seismic data from the vicinity of the Oświno IG 1 well allowed for significant reinterpretation of the Oświno structure, which was previously interpreted as partly pierced salt diapir. This structure developed in Triassic to Jurassic times as a listric normal fault zone detached above the salt layer, resulting from activity of a master fault present within the pre-Zechstein basement. Two pulses of increased extension could be inferred for Oświno fault zone: Late Triassic and Mid-Late Jurassic. The Oświno fault zone was reactivated in the Late Cretaceous due to the compression responsible for inversion of the MPT. Inversion-related uplift of the axial part of the MPT created a morphological gradient and the increased pressure of uplifted overburden rocks directed towards its flanks that also contributed to reactivation of the Oświno fault zone. This fault zone, together with the Drawno-Człopa salt diapiric structure and graben system of the Fore-Sudetic Monocline, have developed due to decoupled evolution of the Mid-Polish Trough.
Źródło:
Geological Quarterly; 2002, 46, 3; 337-346
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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