Record details

Title
    The origin of anomalous magnetism of titanohematite lamellae in rhombohedral oxide assemblages inside igneous and metamorphic rocks
Author
    Adachi, T.
    Kletetschka, Günther
    Mikula, V.
    Wasilewski, P.
Conference
    Castle Meeting New Trends in Geomagnetism, Paleo, Rock and Environmental Magnetism (10. : 03.09.2006-08.09.2006 : Valtice, Česká republika)
Language
    anglicky
Publication type
    abstrakt
Source title - monograph
    Travaux Géophysiques
Pages
    Roč. 38, - (2006), s. 63-64
Notes
    Rozsah: 2 s.
    Výzkumný záměr: CEZ:AV0Z30130516
Subject category
    magnetic properties
    remanent magnetization
    titanohematite
Keyword
    Anomalous
    Assemblages
    Igneous
    Inside
    Lamellae
    Magnetism
    Metamorphic
    Origin
    Oxide
    Rhombohedral
    Rocks
    Titanohematite
Abstract (in english)
   Remanent magnetization of titanohematite lamellae within oxide assemblages in crustal rocks has been proposed to be a source for intense magnetic anomalies both on Earth as well as Mars. In an attempt to explain the origin of such strong magnetization in titanohematite bearing rocks, two hypotheses have been proposed. First hypothesis (Robinson et al., 2002) proposes a new type of magnetization (lamellar magnetization)associated with the contact zone between the ferrian ilmenite and titanohematite. Second hypothesis proposes that the intense magnetization is a consequence of an "empirical law" related to the low saturation magnetization of titanohematite (Kletetschka et al., 2006). We evaluate these two hypotheses in light of further rock magnetic tests. Namely, we compare thermal demagnetization (TD) of Natural Remanent Magnetization (NRM) with TD of Saturation Isothermal Remanent Magnetization (SIRM).
Contributor
    AV ČR Brno, Geologický ústav
Contributor code
    AV ČR, GLÚ
Source format
    U
Import date
    8. 8. 2012