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    Wyświetlanie 1-3 z 3
    Tytuł:
    Tektoniczne znaczenie strefy Teisseyre’a-Tornquista w świetle nowych badań
    Tectonic significance of the Teisseyre-Tornquist zone in the light of new research
    Autorzy:
    Mazur, S.
    Krzywiec, P.
    Malinowski, M.
    Lewandowski, M.
    Aleksandrowski, P.
    Mikołajczak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075679.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    modelowanie grawitacyjne
    modelowanie magnetyczne
    interpretacja sejsmiczna
    obrzeżenie Bałtyku
    deformacja kaledońska
    architektura crustalna
    Polska
    gravity and magnetic modelling
    seismic interpretation
    Baltica margin
    Caledonian suture
    crustal architecture
    Polska
    Opis:
    The Teisseyre-Tornquist Zone (TTZ), a transcontinental feature evident from magnetic and gravity maps, runs obliquely across the territory of Poland from the NW to SE and for a century it has been considered a deep tectonic boundary between the Pre- cambrian East European Platform (EEP) in the NE and the so-called young Palaeozoic Platform in the SW. The results of quantitative interpretation of gravity and magnetic data, integrated with data from new reflection seismic profiles crossing the TTZ, indicate the continuation of the Precambrian basement of the EEP and its lower Palaeozoic cover toward the SW underneath the Palaeozoic Platform of southwestern Poland. They also suggest the occurrence of a crustal keel beneath the TTZ. In the broader context ofEuropean geology, these results imply the location of a hypothetical Caledonian tectonic suture, marking the site of the collision between Avalonia and Baltica, not along the TTZ, but farther SW, in northern Germany and southwest Poland. Another implication is that the extensive Permian-Mesozoic sedimentary basins of western Poland are established above the attenuated margin of the Baltica palaeocontinent.
    Źródło:
    Przegląd Geologiczny; 2017, 65, 12; 1511--1520
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strefa Teisseyre’a-Tornquista : dawne koncepcje a nowe dane
    Teisseyre-Tornquist Zone : evolving approaches and new data
    Autorzy:
    Narkiewicz, Marek
    Petecki, Zdzisław
    Powiązania:
    https://bibliotekanauki.pl/articles/2075897.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Strefa Tornquist-Teisseyre
    pola potencjalne
    sondowanie sejsmiczne
    modelowanie grawitacyjne
    skorupa kratoniczna
    platforma paleozoiczna
    Teisseyre-Tornquist Zone
    potential fields
    deep seismic sounding
    gravity modelling
    cratonic crust
    Paleozoic Platform
    Opis:
    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.
    Źródło:
    Przegląd Geologiczny; 2019, 67, 10; 837--848
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gravity field modelling and gravimetry
    Autorzy:
    Krynski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/145294.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gravity field
    geoid
    quasigeoid
    absolute gravity
    gravimetry
    global geopotential model
    height anomaly
    pole grawitacyjne
    grawimetria
    modelowanie geoidy
    Opis:
    The summary of research activities concerning gravity field modelling and gravimetric works performed in Poland in the period of 2011-2014 is presented. It contains the results of research on geoid modelling in Poland and other countries, evaluation of global geopotential models, determination of temporal variations of the gravity field with the use of data from satellite gravity space missions, absolute gravity surveys for the maintenance and modernization of the gravity control in Poland and overseas, metrological aspects in gravimetry, maintenance of gravimetric calibration baselines, and investigations of the nontidal gravity changes. The bibliography of the related works is given in references.
    Źródło:
    Geodesy and Cartography; 2015, 64, 2; 177-200
    2080-6736
    2300-2581
    Pojawia się w:
    Geodesy and Cartography
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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