Abstract:This article analyzed the strain field and sectional strain accumulation characteristics about Qinghai-Tibet block with the 2004-2013 GPS velocity field data. The results show that: 1)The stable Alashan and Ordos blocks stop the migration for northeast on the Qilian and Helan faults for east; 2)The high value areas of principal compressive strain rate and the maximum shear strain rate distribute the eastern of Qilianshan faults and from the eastern of Haiyuan fault to the western of Liupanshan fault, the high value areas of compressibility surface expansion distributes at the eastern of Qilianshan faults; 3)The relative movement features are mainly compression and both left-lateral strike-slip of the eastern of Qilianshan faults, mainly left-lateral strike-slip and both compreesion from the eastern of Haiyuan fault to the western of Liupanshan fault.
WU Yongcai,BAO Changyan,TANG Hongtao. Strain Field Analysis of Northeast Margin of Qinghai-Tibet Block Based on GPS Velocity Fields[J]. jgg, 2016, 36(11): 981-984.