摘要
利用1999~2013年青藏高原东南缘的GPS速度场观测数据,采用DEFNODE程序反演红河断裂带走滑速率、三维闭锁程度和滑动亏损分布。反演结果表明:红河断裂带北、中、南段右旋走滑速率分别约为(5.9±1.2)mm/a,(4.8±0.6)mm/a和(4.3±0.4)mm/a,在地表以下6km的闭锁程度分别为0.43,0.22和0.25,其滑动亏损速率分别为3.3mm/a,2.6mm/a和2.3mm/a,红河断裂带闭锁程度和应变积累程度都比较低,与近年来红河断裂带整体活动微弱的现状相吻合。
Using the GPS velocity field data from 1999~2013in the southeastern margin of the Tibetan Plateau,it presents the slip rate,three-dimensional fault locking and slip deficit rates of Red River fault zone through DEFNODE.The results show that right-lateral strike-slip rate of Red River fault zone in the north,mid and south part are respectively about(5.9±1.2)mm/a,(4.8±0.6)mm/a,(4.3±0.4)mm/a,and in 6km below the surface the slip deficit rates arerespectively about 0.43,0.22,0.25.These results show that the locking fraction and the degree of strain accumulation are low,which is consistent with the fact that Red River fault zone appears weakly at present time.
出处
《测绘工程》
CSCD
2015年第8期20-22 26,共4页
Engineering of Surveying and Mapping
基金
国家自然科学基金资助项目(41461087)
