新疆哈密星星峡花岗岩体动力侵位机制

DYNAMIC EMPLACEMENT MECHANISM OF XINGXINGXIA GRANITE,HAMI,XINJIANG PROVINCE

星星峡复式花岗岩体侵位于塔里木板块北缘同准噶尔板块碰撞带内的坡子泉逆冲—走滑深大断裂带中。岩体平面上呈三角形，从中心向外侵入时间越来越老。岩体的侵位是由于坡子泉逆冲—走滑断裂在走向上发生变化，两侧位移量出现差异而造成三角形的虚脱空间，使岩浆乘虚侵入。

The Xingxingxia granitic body,a composite intrusve emplaced into the Poziquan thrust strike slip deep fracture zone and situated in the collision belt be tween the north border of Talimu Plate and Zhungeer Plate,reveals a distinct triangular form in plan view.The chronological ages of the composite intrusion increase outward from its center.It is believed that the space emplaced by the composite intrusion is probably produced by the different amount of fault displacement which is displayed by the two fault walls of Poziquan fracture zone with its changing strike direction.