jgg     2011 31 (6):  25-31    ISSN: 0412-1961  CN: 21-1139/TG ANALYSIS OF VERTICAL CRUST DEFORMATION OFNORTHEAST MARGIN OF QINGHAI-TIBET BLOCK BEFORE AND AFTER WENCHUAN Ms8.0 EARTHQUAKE Zhang Sixin; Wang Shuangxu ;and Liu Liwei Second Crust Monitoring and Application Center, CEA, Xi’an 710054 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null