HR: 15:10h
AN: T22C-07    [PDF]
TI: Geodetic slip rates for the major strike-slip faults in the eastern Tibet
AU: * Wang, Q
EM: whgps@public.wh.hb.cn
AF: Institute of Seismology, China Seismological Bureau, Wuhan, 430071 China
AU: Freymueller, J T
EM: jeff@giseis.alaska.edu
AF: Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775 United States
AB: Several active fault systems in the northern and eastern Tibet control, to a large extent, the pattern of active deformation due to the India-Asia collision. Recent GPS geodetic measurements in the region suggest rates of strike-slip motion ranging from several mm/yr to 1 cm/yr on these major faults. Here we report a detailed description of fault slip rates and their variation for the Haiyuan, eastern Kunlun, Xianshuihe-Xiaojiang and Red River faults, using data from hundreds of GPS sites. Many of these sites are part of the Chinese national GPS network, surveyed mostly in 1999 and 2001. The geodetic slip rate estimates for these faults suggest that while active faulting on the major fault systems plays an important role in accommodating eastward crustal movement of Tibetan Plateau, internal deformation and rotation of tectonic blocks bounded by these major faults absorb a significant amount of the eastward lateral extrusion of Tibetan crust.
DE: 1206 Crustal movements--interplate (8155)
DE: 1208 Crustal movements--intraplate (8110)
DE: 8107 Continental neotectonics
SC: Tectonophysics [T]
MN: 2003 Fall Meeting