HR: 15:10h
AN: T23G-06    [Abstracts]
TI: Deep Structure of the NE Tibetan Plateau: An Introduction to Project INDEPTH, Phase IV
AU: Zhao, W
EM: zwj@cags.net.cn
AF: Academy of Geological Sciences (CAGS), 26 Baiwanzhuang Road, Beijing, 100037, China
AU: Brown, L
EM: ldb7@cornell.edu
AF: Department of Earth and Atmospheric Sciences, Cornell University, 3120 Snee Hall, Ithaca, NY 14853, United States
AU: Zhenhan, W
EM: wuzhenhan@sohu.com
AF: Academy of Geological Sciences (CAGS), 26 Baiwanzhuang Road, Beijing, 100037, China
AU: * Klemperer, S
EM: sklemp@stanford.edu
AF: Department of Geophysics, Stanford University, Mitchell Building Room 360, 397 Panama Mall, Stanford, CA 94305, United States
AU: Shi, D
EM: shidanian@cags.net.cn
AF: Academy of Geological Sciences (CAGS), 26 Baiwanzhuang Road, Beijing, 100037, China
AU: Mechie, J
EM: jimmy@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam (GFZ), Mitchell Building Room 360, Potsdam, 14473, Germany
AU: Su, H
EM: suheping@gmail.com)
AF: Academy of Geological Sciences (CAGS), 26 Baiwanzhuang Road, Beijing, 100037, China
AU: Tilmann, F
EM: tilmann@esc.cam.ac.uk
AF: Bullard Laboratories, Department of Earth Sciences, University of Cambridge, Madingley Road, Cambridge, CB3 0EZ, United Kingdom
AU: Guangqi, X
EM: xueguangqi@cags.net.cn
AF: Academy of Geological Sciences (CAGS), 26 Baiwanzhuang Road, Beijing, 100037, China
AU: Karplus, M
EM: mkarplus@stanford.edu
AF: Department of Geophysics, Stanford University, Mitchell Building Room 360, 397 Panama Mall, Stanford, CA 94305, United States
AU: Kind, R
EM: kind@gfz-postdam.de
AF: GeoForschungsZentrum Potsdam (GFZ), Mitchell Building Room 360, Potsdam, 14473, Germany
AU: Makovsky, Y
EM: yizhaq@bezeqint.net
AF: Recanati Institute of Marine Studies, University of Haifa, Mount Carmel, Haifa, 31905, Israel
AU: Meissner, R
EM: rmeissner@email.uni-kiel.de
AF: Institute of Geosciences, Christian Albrechts University, Otto-Hahn-Platz 1, Kiel, 24118, Germany
AB: Since 1992, INDEPTH has acquired active and passive seismic data in three major experiments from south of the High Himalaya to the Qiangtang terrane, north of the Banggong suture. Phase IV of Project INDEPTH is focussed on delineating deep crustal and mantle structure beneath the northeast margin of the Tibetan Plateau, thought by many to represent the focus of active growth of the plateau into the Asian continent. Primary scientific objectives include: i) elucidating the crustal geometry of the thrust/strike slip fault system of the Kunlun that marks the edge of the high plateau, ii) testing the controversial suggestion that the Asian continental lithosphere is underthrusting southwestward beneath the Tibetan Plateau beneath the Kunlun, iii) assessing the role of partial melting in the tectonics of NE Tibet, and contraints on postulated crustal flow. The major technical components of this year's work include: 1) Active seismic imaging with near-vertical and wide-angle techniques; 2) Passive seismic profiling using dense seismometer spacing (ca 5 km) designed to produce high resolution receiver-function images of lithospheric structure; and 3) Geological surface investigations. Additional components scheduled for next year include: 1) a high resolution gravity survey along the seismic profile, and 2) wideband MT and long-period MT ( LIMS ) measurements to investigate deep electrical conductivity along the seismic profiles. The INDEPTH IV controlled source profile extends from Qarhan Salt Lake in the center of the Qaidam basin, across the Kunlun mountains of northern Tibet to Quemalai near the Chumaer River. The INDEPTH IV passive- source profiles are collocated with the controlled source profile across the Kunlun, but includes a second high resolution profile across the Jinsha Suture on the Tibetan Plateau. The INDEPTH IV geological studies are focussed on the timing of crustal shortening and uplift of the Kunlun and adjacent Plateau. Preliminary results will be presented here and in associated INDEPTH posters
DE: 7205 Continental crust (1219)
DE: 7218 Lithosphere (1236)
DE: 8108 Continental tectonics: compressional
DE: 9320 Asia
SC: Tectonophysics [T]
MN: 2007 Fall Meeting