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    Wyświetlanie 1-5 z 5
    Tytuł:
    Deep crustal structure in the region of the Antarctic Peninsula from seismic refraction modelling (next step of data discussion)
    Autorzy:
    Guterch, Aleksander
    Grad, Marek
    Janik, Tomasz
    Perchuć, Edward
    Powiązania:
    https://bibliotekanauki.pl/articles/2052861.pdf
    Data publikacji:
    1990
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctica
    Bransfield Trough
    deep crustal structure
    geotraverse
    Źródło:
    Polish Polar Research; 1990, 11, 3-4; 215-239
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Holy Cross Mts. area - crustal structure, geophysical data and general geology
    Autorzy:
    Dadlez, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059271.pdf
    Data publikacji:
    2001
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Holy Cross Mountains
    gravity
    deep seismic soundings
    crustal structure
    regional geology
    Opis:
    At the start of international seismic experiment CELEBRATION 2000 an attempt at the compilation of the present geophysical and geological data in the Holy Cross Mountains and their surroundings has been made. Five geological units of the first order and four their dividing fault zones have been distinguished in the area studied: uplifted part of the Precambrian Craton (A), Lublin Unit (B), Radom-Łysogóry Unit (C), Kielce-Nida Unit (D), and Upper Silesian Massif (E). They are separated by fault zones: Kock Fault Zone (1) between A and B, Kazimierz Fault Zone (2) between B and C, Holy Cross Fault (3) between C and D, Cracow-Lubliniec Fold Zone (4) between D and E. The first and last units bordering the area are not discussed in this paper. Units B and C are built on the cratonic crust up to 54 km thick. Unit C is composed of poorly correlated mosaic of crustal blocks with crust 35-45 km thick. Fault zones 1 and 3 coincide with crustal fractures while zone 2 has not its counterpart in crustal structure.
    Źródło:
    Geological Quarterly; 2001, 45, 2; 99-106
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lithospheric structure of the western part of the East European Craton investigated by deep seismic profiles
    Autorzy:
    Grad, M.
    Janik, T.
    Guterch, A.
    Środa, P.
    Czuba, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058944.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    East European Craton
    crustal structure
    mantle reflectors
    deep seismic refraction
    seismic ray tracing
    Opis:
    The Palaeoproterozoic collision of Archaean Fennoscandia, Volgo-Uralia and Sarmatia, viewed as a large composite of terranes, each with an independent history during Archaean and Early Proterozoic time, formed the East European Craton. This paper summarizes the results of deep seismic sounding investigations of the lithospheric structure of the southwestern part of the East European Craton. On the basis of the modern EUROBRIDGE’94–97, POLONAISE’97 and CELEBRATION 2000 projects, as well as of data from the Coast Profile and from reinterpreted profiles VIII and XXIV, the main tectonic units of Fennoscandia and Sarmatia are characterized. The crustal thickness in the whole area investigated is relatively uniform, being between 40 and 50 km (maximum about 55 km). For Fennoscandia, the crystalline crust of the craton can be generally divided into three parts, while in Sarmatia the transition between the middle and lower crust is smooth. For both areas, relatively high P-wave velocities ( 7.0 km/s) were observed in the lower crust. Relatively high seismic velocities of the sub-Moho mantle (~8.2–8.3 km/s) were observed along most of the profiles. The uppermost mantle reflectors often occur ca. 10 to 15 km below the Moho. Finally, we show the variability in physical properties for the major geological domains of Fennoscandia and Sarmatia, which were crossed by the network of our profiles.
    Źródło:
    Geological Quarterly; 2006, 50, 1; 9-22
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polish Geodynamic Expeditions - seismic structure of West Antarctica
    Autorzy:
    Guterch, Aleksander
    Grad, Marek
    Janik, Tomasz
    Środa, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2052477.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    West Antarctica
    Antarctic Peninsula
    Bransfield Strait
    deep seismic sounding
    crustal thickness
    lithospheric structure
    subduction zone
    Źródło:
    Polish Polar Research; 1998, 19, 1-2; 113-123
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lithospheric structure of the TESZ in Poland based on modern seismic experiments
    Autorzy:
    Guterch, A.
    Grad, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058940.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Trans-European Suture Zone
    crustal structure
    mantle reflectors
    deep seismic soundings
    POLONAISE’97
    CELEBRATION 2000
    Opis:
    This paper presents the results of seismic investigations on the structure of the lithosphere in the area of the Trans-European Suture Zone (TESZ) in Poland that is located between the southwestern margin of the East European Craton (EEC) to the north-east, the West and Central European Palaeozoic Platform (PP) to the south-west and the Carpathians to the south. Based on results of the modern POLONAISE’97 and CELEBRATION 2000 projects, as well as older profiles, models are presented for the configuration and extent of different crustal types. In the investigated area, the EEC has a relatively uniform crustal thickness of 40 to 50 km with its three-layered crystalline crust displaying P-wave velocities of 6.1–6.4, 6.5–6.8 and 6.9–7.2 km/s in the upper, middle and lower parts, respectively. The Variscan consolidated crust is covered by 1–2 km thick sediments and consists of two layers with velocities of 5.6–6.3 and 6.5–6.65 km/s. In the Carpathians, sediments reaching to depths of some 20 km and are characterized by velocities of <5.6–5.8 km/s, whilst the underlying two-layered crystalline crust displays velocities of 6.0–6.2 and 6.5–6.9 km/s. The crust of the TESZ can be divided into the Małopolska, Kuiavia and Pomerania blocks that are overlain by up to 9–12 km thick sediments having velocities <5.4 km/s. In the area of the TESZ, the upper part of the consolidated crust has to depths of 15–20 kmrelatively low velocities of <6.0 km/s and is commonly regarded as consisting of deformed and slightlymetamorphosed Early Palaeozoic sedimentary and volcanic series. In this area the middle and lower crust are characterized by velocities in the range of 6.3–6.6 km/s and 6.8–7.2 km/s, respectively, that are comparable to the EEC. Based on the dense network of seismic profiles the map of the depth toMoho is given for the area of Poland. Uppermost mantle reflectors occur about 10 to 15 km below the Moho whereas the deepest reflectors are recorded at depths of 90 km. Future investigations ought to aim at an integrated geological-geophysical program, including deep near-verical reflection-seismic profiling and ultimately the drilling of deep calibration boreholes.
    Źródło:
    Geological Quarterly; 2006, 50, 1; 23-32
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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