巴颜喀拉块体内部NW向主要断裂研究新进展

New Progress of Research on NW-trending Active Faults within the Bayan Har Block

巴颜喀拉块体内部发育着一些大型的NW向走滑断裂:阿万仓断裂、玛多—甘德断裂、甘德南缘断裂、达日断裂、五道梁—长沙贡玛断裂、松岗断裂等。最新的研究表明,这些走滑断裂均具有晚第四纪活动性,并具有孕育和发生强震的构造条件。这些块体内的活动断裂可能扮演着分配和传递巴颜喀拉块体构造变形的角色,甚至在整个青藏高原东缘运动学机制中起着重要的作用。

Some NW-trending strike-slip faults have been developed within the Bay an Harblock,such as the Awancang fault,the Maduo-Gande fault,southern margin of the Gande fault,the Dari fault,the Wudaoliang-Changshagongma fault,and the Songgang fault.The latest research suggests that these strike-slip faults show a late Quaternary activity and have tectonic conditions for producing strong earthquakes.Therefore,the active faults might play a role in distributing and accommodating the tectonic deformation of the Bayan Har block,and even play an important role in the kinematic mechanism of the eastern margin of the Tibetan Plateau.