Three-dimensional in situ stress determination by anelastic strain recovery and its application at the Wenchuan Earthquake Fault Scientific Drilling Hole-1(WFSD-1)

作     者：SUN DongSheng LIN WeiRen CUI JunWen WANG HongCai CHEN QunCe MA YinSheng WANG LianJie 

作者机构：Institute of GeomechanicsChinese Academy of Geological Sciences Key Laboratory of Neotectonic Movement and GeohazardMinistry of Land and Resources Kochi Institute for Core Sample Research Japan Agency for Marine-Earth Science and Technology (JAMSTEC) State Key Laboratory for Continental Tectonics and DynamicsInstitute of Geology Chinese Academy of Geological Sciences 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2014年第57卷第3期

页      面：1212-1220页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：financially supported by the"Wenchuan Earthquake Fault Scientific Drilling"of the National Science and Technology Planning Project,Sinoprobe Deep Exploration in China Project(Grant No.SinoProbe-07) Fundamental Research Fund for Chinese Academy of Geological Sciences(Grant No.SYS1301) Grant-in-Aid for Scientific Research of Japan Society for the Promotion of Science(JSPS)(Grant No.25287134) Ministry of Education,Culture,Sports,Science and Technology(MEXT),Japan(Grant No.21107006) 

主　　题：Wenchuan earthquake anelastic strain recovery compliance of anelastic strain recovery three-dimensional in situ stress scientific borehole 

摘      要：In situ stress state becomes more and more significant with in-depth research on geodynamics and energy ***,there has not been an economic and effective method developed to determine deep three-dimensional in situ *** Anelastic Strain Recovery(ASR)method is a newly developed technique that can determine three-dimensional in situ *** the 12 May 2008 Ms8.0 Wenchuan earthquake,the ASR method was used for the first time in China s Mainland to measure the in situ stresses in the WFSD scientific boreholes in Sichuan Province,*** this paper,the basic procedure of the ASR method is introduced in detail and the compliances of ASR for boring cores are *** results show that the maximum principal stress direction was NW64°at a measured depth(MD)of 1173 m(vertical depth 1151 m)in *** ratio of shear mode to the volume mode compliance of ASR was *** the three principal stresses at 1173 m MD in WFSD-1are 43,28 and 25 *** with stress measurement results determined using other in situ measurement methods along the Longmenshan fault zone,the directions of the maximum horizontal principal stress changes from E-W to NEE-SWW to NWW-SEE when moving from NE to SW along the Longmenshan fault *** change is in agreement with the stress regime of the Longmenshan fault zone of the Wenchuan Earthquake,which supports a stress regime consisting predominantly of thrusts in the southwest and strike-slip in the northeast.