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    Wyświetlanie 1-4 z 4
    Tytuł:
    Tournaisian 40Ar/39Ar age for alkaline basalts from the Lublin Basin (SE Poland)
    Autorzy:
    Pańczyk, M.
    Nawrocki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059639.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    alkaline basaltic rocks
    Ar-Ar geochronology
    Carboniferous
    Lublin Basin
    Opis:
    The main aim of this study is to define precisely the age of the alkaline basalts occurring within the lowermost part of Carboniferous succession in the northeastern part of LublinBasin(drill core Parczew IG-7 and IG-9; SE Poland). The new, whole-rocks 40Ar/39Ar data constrain the age of volcanic activity and emplacement of alkaline basalts to the Late Tournaisian (348 ± 0.8 Ma) with possible prolongation to the Middle Visean (338.5 ± 0.7 Ma). The younger age is however of evidently poorer quality than the older one. The new data caused to correlate the volcanic processes occurring within the Lublin Basin with alkaline intrusions drilled inNE Poland inside the Paleozoic cover of the East European Platform. They also correspond to the volcanoclastic levels defined in different parts of the Trans European Suture Zone in Poland.
    Źródło:
    Geological Quarterly; 2015, 59, 3; 473--478
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tadeusz Depciuch : pionier badań geochronologicznych w Polsce
    Tadeusz Depciuch : pioneer of geochronological studies in Poland
    Autorzy:
    Miecznik, J. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075103.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    K-Ar geochronology
    Sudetes
    NE Poland
    uranium deposits
    geochronologia
    Sudety
    Polska
    złoża uranu
    Opis:
    Dr Tadeusz Depciuch (1928–2007), geochemist, mineralogist and economic geologist, longtime employee of the Polish Geological Institute in Warsaw, as the first scientist in Poland who conducted a systematic study on isotopic age of crystalline rocks. In 1966, after preliminary age determinations by Dr Jerzy Borucki, he undertook research of crystalline rocks of the Lower Silesian Block, mainly granites, and subsequently of rocks of the basement of the Polish part of the East European Precambrian Platform penetrated in the 1960s and 1970s, as well as igneous rocks of its cover. He used the K-Ar method, applying its volumetric variety on own-designed equipment. Age determinations allowed identifying the magmatic and metamorphic stages of the development of the crystalline basement evolution, and establishing the stratigraphy. They also played an important role in the research on Variscan plutonism in Lower Silesia. Tadeusz Depciuch participated in prospecting for uranium deposits in the Sudetes, using geochemical methods, and studied the origin of some deposits. In 1974–1984, he worked in Africa (Benin) as a UN expert in the field of geochemistry and economic geology.
    Źródło:
    Przegląd Geologiczny; 2014, 62, 10/1; 503--509
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New 40Ar-39Ar age constrains for magmatic and hydrothermal activity in the Holy Cross Mts. (southern Poland)
    Autorzy:
    Nawrocki, J.
    Salwa, S.
    Pańczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060553.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Ar-Ar geochronology
    diabases
    mineralization
    Holy Cross Mountains
    Opis:
    New 40Ar-39Ar isotope ages of diabase intrusions from the Holy Cross Mountains (Poland) confirm the presence of at least two events of Paleozoic magmatic activity in the study area. The oldest, latest Silurian/earliest Devonian (ca. 424–416 Ma) episode is recorded by a diabase from the Bardo Syncline (Zarobiny PIG-1 borehole) in the Kielce Region. A younger, Serpukhovian (ca. 331–323 Ma) event is documented by a diabase from the Milejowice-1 borehole drilled in the Łysogóry Region. The diabase intrusion penetrated by the Wzorki-1 borehole, also located in the Łysogóry Region, is most probably of the same age. It provided, however, consistent mid-Triassic (243 Ma) 40Ar-39Ar isotopic age reflecting its pervasive hydrothermal alteration. The first stage of the post-Caledonian hydrothermal activity in the Holy Cross Mts. which produced polymetallic copper and iron-bearing mineralisation may be linked with the younger magmatic phase defined here. The second stage of post-Caledonian hydrothermal activity in the Holy Cross Mts., associated with the lead-zinc mineralisation, may be correlated with the Middle Triassic hydrothermal event recorded in the Wzorki diabase. Suggestions of temporal relationships between magmatic/hydrothermal activities and mineralisation events should, however, be constrained by further detailed geochemical and mineralogical studies.
    Źródło:
    Geological Quarterly; 2013, 57, 3; 551--560
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    40Ar-39 Ar ages of selected rocks and minerals from the Kraków-Lubliniec Fault Zone, and their relation to the Paleozoic structural evolution of the Malopolska and Brunovistulian terranes (S Poland)
    Autorzy:
    Nawrocki, J.
    Krzemiński, L.
    Pańczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059087.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    S Poland
    late Paleozoic
    palaeogeography
    Ar-Ar geochronology
    Opis:
    New 40Ar-39 Ar isotope ages of mafic and felsic rocks from the contact zone of the Malopolska and Brunovistulian terranes are presented and discussed. A 40Ar-39 Ar age estimation of detrital muscovite from a Lower Devonian "old red" type sandstone drilled on the Malopolska side of this zone was also done. Our studies reveal that three events of Paleozoic magmatic activity took place in the study area. The oldest, late Emsian episode is recorded by a diorite from the core part of an intrusion penetrated by the Sosnowiec IG 1 borehole. A younger, Visean event is documented by a diabase cored in the borehole WB-137. Diabases from Niedwiedzia Góra and from borehole PZ-10, and a rhyodacite from borehole 16-WB gave early Permian (Artinskian-early Sakmarian) ages. The youngest, middle Sakmarian age was obtained for a diabase forming the external parts of the Sosnowiec IG 1 polycyclic intrusion. A diorite penetrated by the Sosnowiec IG 1 borehole was emplaced during the late Emsian extension that preceded the Lochkovian-Pragian? transpression related to the final docking and amalgamation of the Brunovistulian Terrane.
    Źródło:
    Geological Quarterly; 2010, 54, 3; 289-300
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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