Inter-seismic deformation field of the Ganzi-Yushu fault before the 2010 Mw 6.9 Yushu earthquake
作者： Yanzhao Wang , Min Wang , Zheng-Kang Shen , Weipeng Ge , Kang Wang
DOI: 10.1016/J.TECTO.2012.03.026
关键词:
摘要: Abstract The 14 April 2010 Mw 6.9 Yushu earthquake ruptured the northwestern segment of Ganzi-Yushu fault in Qinghai Province, China. Using GPS data obtained from 1999 to 2007 vicinity fault, we estimate slip rates Fenghuoshan and faults, Xianshuihe as 6.1 ± 1.9, 6.6 ± 1.5, 9.7 ± 0.7 mm/a for left lateral components, 2.8 ± 1.9, 1.7 ± 1.6, − 2.0 ± 0.9 mm/a shortening respectively. Maduo-Gande slips laterally at a rate about 1–2 mm/a, ~ 3 mm/a sinistral shear motion is unexplained, possibly caused by deformation across one or more unknown faults region. These results agree with geological estimates rates, show progressive increase northwest southeast segments Xianshuihe–Ganzi-Yushu zone, implying variation transferring absorbing different regions around Tibetan plateau.
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