试论沙尔布尔山构造演化

沙尔布尔山位于西准噶尔北缘，呈近东西向延伸，属加里东沟弧系，哈萨克斯坦板块边缘活动带．经这次1：50000地质填图，测定出该区蛇绿岩年龄为626Ma．这是迄今在准噶尔盆地四周出现最古老的洋壳残片．根据沉积建造，岩石组合可分为Ⅲ期演化阶段：震旦纪——奥陶纪为洋壳拉张到闭合阶段，志留纪至早泥世为有限洋盘阶段，中泥盘世——早石炭世为陆缘海阶段．伴随该区地壳演化形成复式诏皱带．由于后期左旋扭动，使早期的构造城发生强烈的扭曲．由西向东、由北西向延伸的扭曲转变呈呈曲率较大的平行橹皱；再往东转变，呈轴向东西延伸的尖校招皱，其间被北西向压扭性断裂所切割．

DISCOURSE ON EVOLUTION OF THE TECTONICS OF THE SHAERBUER MOUNTAIN AREA

Shaerbuer mountain is located in the north ridge of the west Jugger. It strechs to east and west,belonges the trencharc of Caledonian in the active zone of the ridge of the kazaKhstan plate. By maping of 1/5 fifty thouthand,measuring the age of ophiolites is 626 Ma,the result,known in present,shows the oldest ocean crust in the Jungger basin. Based on the sedimentary formation and rock association,the evolution is divided into three stage:the first stage, from sinian to Ordivian, the oceanic crust developed and closed; the second stage, it transformed the linited ocean besin from siluvian to early Devonian;the last stage,it became the residul sea basin from mid-Devonian to early cardovian. Following the evolution of the crust in the area,the zone of complex fold was formed. Because of sinistral rotated shearing in late,to tnake the early tectonic -line happened strongly shearing,it changed into the parallel fold of the larger curvature from west to east,and further to east,became the east and west axial chevron fold,which they are cut by the northwest compreso-shear fracture.