中文摘要：

自从 1975 由中国的 Xinjiang 地震网络记录了，在印度人 KushPamirwestern 中国区域的 seismicity 的 3-D 几何学被地震记录从国家地震信息中心，美国地质的调查，和超过 16,000 重定位的地震为 19751999 定义。结果证明在区域的大多数女士 5.0 hypocenters 被限制到主要 intracontinental 地震砍地区(MSSZ ) 。MSSZ，它在 Pamir 向南蘸在印度人 Kush 有一个蘸北方的对应物到西方；二个构造领域被 IndiaAsia collisional 地区的左首的 Chaman 变换差错分开。我们证明 MSSZ 组成上面的边界一蘸南方，活跃地 subducting Pamir 大陆人板。三地震集中在在 4565 km， 95120 km，和 180220 km 之间的深度就在 Pamir MSSZ 上面被认出，建议各发生的不同结构的关系。从在所有三地震学上的集中的焦点的机制答案的结果证明主要最大值的取向强调在一个 NNWSSE 方向将近水平。蘸南方的 Pamir subduction 平板与一个宽上面的顶和一个狭窄的更深的底部是楔形的；平板在 ca 的肘深度下面在更低的部分在上面的部分和更陡峭的剧降有剧降的一个轻轻的角度。80120 km。大多数与地震有关的变丑在 subducting Pamir 平板的挂的墙以内发生。在 Pamir 的出版地质的数据和重复 GPS 大小记录宽广 supra-subduction，演变的上面的外壳的地区对立(即蘸北方) 背戳贡献纵贯的外壳的弄短并且为在更早的 Tethyan 期间形成的一些超离频压力的岩石的发掘负责板集中。在 Pamir 和 Chaman 的活动的轮流出现的出现地震地区显示在 Chaman 变换差错系统的罢工滑倒运动和 Pamir 地震地区的 deep-subduction 之间有相互作用。Pamir subduction 相关的 seismicity 与增加变换差错的距离东方深入地变得更浅。因此， Chaman 变换差错的左首的运动出现到在 Pamir 区域正在影响大陆人 deep-subduction 并且可以为 intracontinental Pamir 板的不平常的蘸南方的几何学提供解释。

英文摘要：

The 3-D geometry of the seismicity in Hindu Kush-Pamir--western China region has been defined by seismic records for 1975-1999 from the National Earthquake Information Center, the U.S. Geological Survey, and over 16,000 relocated earthquakes since 1975 recorded by the Xinjiang seismic network of China. The results show that most Ms≥ 5.0 hypocenters in the area are confined to a major intracontinental seismic shear zone （MSSZ）. The MSSZ, which dips southwards in Pamir has a north- dipping counterpart in the Hindu Kush to the west; the two tectonic realms are separated by the sinistral Chaman transform fault of the India-Asia collisional zone. We demonstrate that the MSSZ constitutes the upper boundary of a south-dipping, actively subducting Pamir continental plate. Three seismic concentrations are recognized just above the Pamir MSSZ at depths between 45-65 km, 95-120 km, and 180-220 km, suggesting different structural relationships where each occurs. Results from focal mechanism solutions in all three seismological concentrations show orientations of the principal maximum stress to be nearly horizontal in an NNW-SSE direction. The south-dipping Pamir subduction slab is wedge-shaped with a wide upper top and a narrow deeper bottom; the slab has a gentle angle of dip in the upper part and steeper dips in the lower part below an elbow depth of ca. 80--120 km. Most of the deformation related to the earthquakes occurs within the hanging wall of the subducting Pamir slab. Published geologic data and repeated GPS measurements in the Pamir document a broad supra-subduc- tion, upper crustal zone of evolving antithetic （i.e. north-dipping） back-thrusts that contribute to northsouth crustal shortening and are responsible for exhumation of some ultrahigh-pressure rocks formed during earlier Tethyan plate convergence. An alternating occurrence in activity of Pamir and Chaman seismic zones indicates that there is interaction between strike-slip movement of the Chaman transform fault system and deep-subduction of the