Podrobnosti záznamu

Název
    Principle views on the genesis of astroblemes and related mineralizations
Údaj o odpovědnosti
    Lubomír Kopecký
Autor
    Kopecký, Lubomír
Jazyk
    anglicky
Zdrojový dokument - seriál
    Acta Universitatis Carolinae. Geologica
Svazek/č.
    Vol. 41, no. 1
Strany
    p. 127-149
Rok
    1997
Poznámky
    11 obr., 1 fot., 4 s.bibl.
    Zkr. název ser.: Acta Univ. Carol., Geol.
Předmětová skupina
    alkalický typ
    astroblém
    brekcie drcená
    hypotéza
    kaldera
    kontrola tektonická
    kráter impaktní
    kryptogenní jevy
    prekambrium
    rudy Cu
    rudy Ni
    subsidence
    surovina diamantová
    ultrabazika
    vulkanismus
Geografické jméno
    Amerika severní
    Austrálie-Tasmania
    Rusko
    SRN
Klíčové slovo
    Astroblemes
    Genesis
    Mineralizations
    Principle
    Related
    Views
Abstrakt (anglicky)
   The article provides views on astroproblems genesis with special regard to cryptovolcanic and impact hypotheses. Particular attention is paid to evidence of their internal (endogenous) origin: the prolonged evolution and non-random distribution on the Earth s surface. Alkaline-ultramafic magmatism and astroproblemes are considered to be controlled by structural phenomena. To occurrence of Fe-Ni-Co-Cr alloys and Ir in suevite-tagamite, and similar glass containing rocks in large astroblemes (Popigai, Russia; Nördlinger Ries, Germany) is interpeted as a product of internal magmatic activity. Cryptovolcanic character of these structures is thought to be supported by their prolonged evolution and their geotectonic position related to alkaline-ultramafic magmatism. Prolonged evolution of the diamond-bearing Puczezh-Katun Structure (Russia) and of Ni-Cu-PGEs. Mineralization-bearing Sudbury Structure (Ontario, Canada) is demonstrated using the published data.
   Pre-crater domes of astroproblemes generally created by the escape of their ultramafic parent magma and by hot high-pressure fluid released from deep mantle (in terms of Nicolaysen and Ferguson) are considered a strong evidence for their internal (cryptovolcanic) origin
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    14. 1. 2008
Datum importu
    8. 8. 2012