Podrobnosti záznamu

Název
    NRM measurements of shatter cones and rim deposits from the Sierra Madera Impact Crater in Texas, USA
Autor
    Adachi, T.
    Kletetschka, Günther
    Mikula, V.
    Wasilewski, P.
Konference
    Castle meeting palaeo, rock and environmental magnetism (03.09.2006-08.09.2006 : Valtice, Česká republika)
Jazyk
    anglicky
Typ dokumentu
    abstrakt
Zdrojový dokument - monografie
    Travaux Géophysiques
Strany
    Roč. 38, - (2006)
Poznámky
    Rozsah: 2 s.
Předmětová kategorie
    natural remanent magnetization
    Sierra Madera impact crater
    Texas
Klíčové slovo
    Cones
    Crater
    Deposits
    Impact
    Madera
    Measurements
    NRM
    Rim
    Shatter
    Sierra
    Texas
    USA
Abstrakt (anglicky)
   Terestrial rocks with Thermal Remanence Magnetization, TRM and Chemical Remanence Magnetization,CRM have the efficiency (Natural Remanent Magnetization, NRM and Saturation Isothermal Remanent Magnetization, SIRM ratio = REM) of between 1-2% proposed by Wasilewski (1977), and Kletetschka et al.(2003). Dickinson and Wasilewski (2000) suggested creations and destructions of magnetic remancence by shock events in iron particle in extraterrestrial rocks. Impact experiments on various minerals discussed by Kletetschka et al. (2005) suggested a significant reduction of initial magnetization in impact pressures as low as 1 GPa. Consequences of this demagnetization is a low efficiency value of REM. We show the initial data acquired from Sierra Madera Impact Crater shatter cone, impact breccia, and rim carbonate deposits that indicate the reduction/demagnetization of NRM in the shatter cone samples.
Přispěvatel
    AV ČR Brno, Geologický ústav
Kód přispěvatele
    AV ČR, GLÚ
Zdrojový formát
    U
Datum importu
    8. 8. 2012