HR: 15:25h
AN: T23G-07    [Abstracts]
TI: Controlled Source Imaging of the Kunlun Suture, Northeast Tibetan Plateau
AU: * Karplus, M S
EM: mkarplus@stanford.edu
AF: Stanford University, Department of Geophysics, 397 Panama Mall, Mitchell Building 360, Stanford, CA 94305, United States
AU: Klemperer, S L
EM: sklemp@stanford.edu
AF: Stanford University, Department of Geophysics, 397 Panama Mall, Mitchell Building 360, Stanford, CA 94305, United States
AU: Brown, L D
EM: ldb7@cornell.edu
AF: Cornell University, Department of Earth and Atmospheric Sciences, 3120 Snee Hall, Ithaca, NY 14853, United States
AU: Chen, C
EM: ccgeophy.pku@gmail.com
AF: Cornell University, Department of Earth and Atmospheric Sciences, 3120 Snee Hall, Ithaca, NY 14853, United States
AU: Zhao, W
EM: zhaowj@cae.cn
AF: Chinese Academy of Geological Sciences, 26 Baiwanzhuang Road, Beijing, 100037, China
AU: Shi, D
EM: shidanian@cags.net.cn
AF: Chinese Academy of Geological Sciences, 26 Baiwanzhuang Road, Beijing, 100037, China
AU: Wu, Z
EM: wuzhenhan@sohu.com
AF: Chinese Academy of Geological Sciences, 26 Baiwanzhuang Road, Beijing, 100037, China
AU: Mechie, J
EM: jimmy@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany
AU: Su, H
EM: suheping@gmail.com
AF: Chinese Academy of Geological Sciences, 26 Baiwanzhuang Road, Beijing, 100037, China
AU: Xue, G
EM: xueguangqi@cags.net.cn
AF: Chinese Academy of Geological Sciences, 26 Baiwanzhuang Road, Beijing, 100037, China
AU: Makovsky, Y
EM: yizhaq@bezeqint.net
AF: University of Haifa, Recanati Institute of Marine Studies, Mount Carmel Haifa, 31905, Israel
AU: Caldwell, W B
EM: warrenc@stanford.edu
AF: Stanford University, Department of Geophysics, 397 Panama Mall, Mitchell Building 360, Stanford, CA 94305, United States
AU: Kind, R
EM: kind@gfz-postdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany
AU: Meissner, R
EM: rmeissner@email.uni-kiel.de
AF: Christian Albrechts University, Institute of Geosciences, Otto-Hahn-Platz 1, Kiel, 24118, Germany
AB: In June of 2007, project INDEPTH IV conducted a 260 km controlled source seismic refraction/reflection experiment across the Kunlun suture in the Northeast Tibetan Plateau from the Qumarlai area to the Qaidam Basin. Approximately 950 PASSCAL "Texan" seismographs were deployed, together with a conventional 1000- channel cabled seismometer system (Sercel 408XL, 24 bit) in a fixed spread. The cabled system with 50-m geophone spacing and ~650 Texans with 100-m spacing instrumented a central 115-km reflection segment across the Kunlun fault and suture. The "reflection" profile used ~100 explosive sources, nominally of 80 kg in 30-m shotholes, at 1-km spacing. ~300 additional Texans at 650-m spacing extended the reflection recording spread 80 km north and south along the profile to acquire wide-angle reflection/refraction data, out to the critical distance for Moho reflections. Five large explosions of 2000 kg, 1500 kg, or 1000 kg detonated at roughly even increments along the line acted as principal sources for the wide-angle profile. The controlled source data will allow the determination of crustal thickness and overall velocity and reflectivity structure. Anticipated results include insights into the Tertiary evolution and modern tectonic environment of the plateau. We expect the geophysical data to provide constraints on competing theories of plateau formation (e.g., deep crustal flow vs. imbricate stacking and subduction of Asian crust) and to further discern fault geometries of strike-slip and thrust systems (e.g., whether faults penetrate the entire crust).
DE: 7205 Continental crust (1219)
DE: 8108 Continental tectonics: compressional
DE: 8159 Rheology: crust and lithosphere (8031)
SC: Tectonophysics [T]
MN: 2007 Fall Meeting