【摘要】 通过研究用1999~2004年多期GPS观测资料计算获得的青藏块体东北缘地壳水平运动图像发现:甘青块体可分为东部块体和西部块体,它们的运动状态存在明显的差异,2001年11月14日昆仑Ms8.1地震后,其差异表现得尤为明显。进一步结合地质、地球物理资料确定了分界带的位置:分界带的整体走向为北东向;北部位于金昌与武威之间;中部在祁连山东部、门源以西;南部位于德令哈以东青海湖以西的地方。并对形成这种运动态势的机制进行了探讨。更多还原

【Abstract】 Having studied GPS data observed from 1999 to 2004, we find that the Gansu-Qinghai block can be divided into two parts and the movement of east part is different from the west. After Ms8.1 Kunlun earthquake the difference becomes more clear. The position of the boundary belt is determined with the geological and geophysical data.It turns out that the strike of boundary belt is NE; Its northern part lies between Jinchang and Wuwei,its middle part lies in the east of Qilianshan mountain and the west to Menyuan,its southern part lies in the east of Delinha and the west to Qinghai lake.At last the mechanism of crustal movement is discussed.更多还原