HR: 17:50h
AN: GP34A-07 INVITED [WITHDRAWN]    [Abstracts]
TI: Rock Magnetism of Continental Sediments from Central Asia: Insights into Tectonic Exhumation and Erosion
AU: * Chen, Y
EM: Yan.Chen@univ-orleans.fr
AF: Institut des Sciences de la Terre d'Orléans, ISTO Université d'Orléans, Orléans, 45067, France, Metropolitan
AU: Gilder, S
EM: gilder@geophysik.uni-muenchen.de
AF: Institut de Physique du Globe de Paris, IPGP 4, Place Jussieu, Paris, 75252, France, Metropolitan
AU: Gilder, S
EM: gilder@geophysik.uni-muenchen.de
AF: Department of Earth and Environment, Ludwig Maximilians University Theresienstrasse 41 , Munich, 80333, Germany
AU: Charreau, J
EM: jcharrea@indiana.edu
AF: Institut des Sciences de la Terre d'Orléans, ISTO Université d'Orléans, Orléans, 45067, France, Metropolitan
AU: Charreau, J
EM: jcharrea@indiana.edu
AF: Department of Geological sciences, Indiana UNiversity 1001 E. 10th. Street, Bloomington, 47405, United States
AB: We have carried out five detailed magnetostratigraphic and rock magnetic studies in 2 to 3 kilometer-thick continuous sections of continental sediments in central Asia. Sedimentation rates are established from magnetostratigraphy, while rock magnetic profiling helps to define changes in the source material or in the hydrodynamic regime acting during sedimentation. In particular, characterizing the temporal evolution in rock magnetic parameters via anhysteretic remanent magnetization and the anisotropy of magnetic susceptibility have proven invaluable to our work. They also help significantly in correlating the magnetostratigraphic column with the reference polarity time scale. Our presentation will focus on how rock magnetic profiling assists in the pattern matching process inherent in magnetostratigraphy, and how we interpret changes in the various parameters, including sedimentation rate, to glean information related to the exhumation and erosion of the nearby mountains.
DE: 1518 Magnetic fabrics and anisotropy
DE: 1520 Magnetostratigraphy
DE: 1527 Paleomagnetism applied to geologic processes
DE: 1540 Rock and mineral magnetism
DE: 1815 Erosion
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2007 Joint Assembly