Record details

Title
    New insight into the origin of anomalous magnetism of titanohematite lamellae in rhombohedral oxide assemblages -consequence for Mars magnetism
Author
    Adachi, T.
    Heřmánek, M.
    Kletetschka, Günther
    Mikula, V.
    Wasilewski, P. J.
    Zbořil, R.
Conference
    American Geophysical Union ; Joint Assembly (22.05.2007-25.05.2007 : Acapulco, Mexiko)
Language
    anglicky
Publication type
    abstrakt
Source title - monograph
    EOS, Transactions, American Geophysical Union
Pages
    Roč. 88, č. 23 (2007), GP33A-07
Notes
    Překlad názvu: Nový náhled do původu anomalní magnetizace titanohematitovych lamel ve rhombohedrálních uspořádáních
    Rozsah: 2 s. : WWW
    Výzkumný záměr: CEZ:AV0Z30130516
Subject category
    magnetic anomalies
    magnetization
    titanohematite
Keyword
    -consequence
    Anomalous
    Assemblages
    Insight
    Lamellae
    Magnetism
    Mars
    New
    Origin
    Oxide
    Rhombohedral
    Titanohematite
Abstract (in english)
   In an attempt to explain the origin of such strong magnetization in titanohematite bearing rocks, two hypotheses have been proposed. We evaluate these two hypotheses in light of temperature dependent Mossbauer spectra and magnetic measurements. Resulting measurements determine that strong magnetization of titanohematite is due to large canting angle (32 degree from the anti-parallel arrangement) causing ferromagnetic contribution of the titanohematite to the overall magnetization. We also show that the smallest titanohematite lamellae demonstrate blocking temperature near 300C and do not enhance but diminish the overall remanent magnetization.
Contributor
    AV ČR Brno, Geologický ústav
Contributor code
    AV ČR, GLÚ
Source format
    U
Import date
    8. 8. 2012