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TEMPORAL SPATIAL VARIATION CHARACTERISTICS OF CRUST DEFORMATION OF ACTIVE TECTONIC BLOCKS IN NORTH CHINA

查看全文 作  者:Xu Caijun, Li Zhicai and Wang Hua (School of Geodesy and Geomatics, Wuhan University, Wuhan 430079,China) 高影响力作者 出  处:《大地测量与地球动力学》索引2003年第23卷第B12期,共9页高影响力期刊 基  金:SupportedbytheNationalNaturalScienceFoundation(No.49904001)andFoundationforSurveyingoftheStateKeyLaboratoryofInformationEngineeringforSurveying,MappingandRemoteSensing((99) 0 2 0 3 ) 摘  要:Global Positioning System (GPS) observations during four measurement campaigns from 1992 to 1999 are used in a study of the temporal and spatial variation characteristics of crustal deformation of active tectonic blocks in North China. The Euler vectors for these active blocks are determined on the basis of GPS velocities of a group relative stable points in 1992,1995,1996 and in 1996,1999 respectively. We have studied the relative motion between blocks at the boundaries and the intra block deformation field. We have also inverted the strain rate fields for these active blocks by bi cubic spline model based on the GPS velocity field. The results show that the intra block deformation rates are different from those in block boundary zones, and are also different in different periods; the deformational field is generally characterized by intra-block extension in North China. 关 键 词:活动板块 表层变形 中国北方 瞬时空间变化特性 边缘区的运动 应力等级场 地质结构 内部变形
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