摘要
塔什库尔干断裂带是由多条运动性质不同的次级断层组成。该断裂带北段的木吉河断层运动特征以逆冲为主，兼有右旋走滑分量。该断层全长20km左右，全新世以来仍有较强活动，断错了全新世中晚期的地貌面，对吉如吉能沟西岸的阶地变形进行测量，得到Ⅰ、Ⅱ阶地的垂直断错量分为10m和14m左右。通过对变形阶地的年代测定，计算得到全新世中期以来，木吉河断层的平均垂直滑动速率为1．8—2．1mm／a，所造成的南北向地壳缩短为1．1～1．3mm／a。
Tashikurgan fault zone is composed of many secondary faults with different motion characteristics. Mujihe fault lies on the northern segment and its main motion characteristics is thrusting, and have dextrorotation slip component. The length of Mujihe fault is about 20 km, it is active since holocene, and it break the physiognomy surface of middle and late holocene, measuring the terrace deformation on western band of Jirujineng chimb, and obtain vertical displacements of Ⅰ , Ⅱterrace are 10 km and 14 km. Aged the deformation terrace, and found average vertical slip rate of Mujihe fault is from 1.8 to 2.1 mm/a since holocene, it make the crust in NS direction shorten from 1.1 to 1.3 mm/a.
出处
《内陆地震》
2008年第1期43-47,共5页
Inland Earthquake
