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地质通报  2005 

东昆仑活动断裂带玛曲段活动特征及其东延

, PP. 30-35

Keywords: 青藏高原东昆仑活动断裂带玛曲活动断裂晚更新世

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Abstract:

东昆仑活动断裂是青藏高原东北缘一条重要的NWW向边界断裂。通过野外观测和遥感解译,发现东昆仑活动断裂带玛曲段主要由玛曲、迭部-武都和迭山-舟曲3条左阶斜列的活动断裂组成。该断裂带晚第四纪的活动性非常强烈,晚更新世晚期以来的平均左旋走滑运动速率达(10.15±0.34)mm/a,与该断裂带在西大滩、东大滩、花石峡和玛沁等地的运动速率基本相同,说明东昆仑活动断裂带延伸到玛曲段并没有逐渐消亡,而是继续向东延伸,最终与秦岭南缘活动断裂相接。

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