一、引言 巴基斯坦北部山区被一系列大断裂所切割,这部分是由于印度板块和欧亚板块碰撞所致。两条大断裂,即主幔逆断层(MMT)和主喀喇昆仑逆断层(MKT),是两条几乎包围了科希斯坦-拉达赫岛弧的缝合线(图1)。本文报道应用裂变径迹法对MMT进行研究,以确定它的运动方向、速度和时代的结果。 I. INTRODUCTION Mountains in the north of Pakistan are cut by a series of major faults, partly due to the collision between the Indian and Eurasian plates. Two large faults, the MMT and MKT, are two sutures that almost enclose the Kohlstein-Rakah arc (Figure 1). This article reports the use of fission track MMT study to determine its direction of motion, speed and time results.