东准噶尔造山带结构及岩片组合特征

STRUCTURE OF EAST JUNGGAR OROGENIC BELT AND THE COMBINATION CHARACTERISTICS OF ROCK SHEETS

位于哈萨克斯坦－准噶尔板块东部的东准噶尔造山带，根据１∶２５万区调成果，以大地构造相为基础，划分出准南陆缘活动带和准东北晚古生代沟－弧－盆系两个二级构造单元，并划分出塔克扎勒弧前海沟带，考克塞尔盖古生代叠加岛弧带和条山弧后盆地三个三级构造单元。这些构造单元是多期构造的复合体，具有相对独立的演化过程、相应的建造系列及各具特色的岩片组合形式。

According to the 1∶250 000 regional geological survey and based on the tectonic facies,east Junggar Orogenic Belt which is situated in the east region of Kazakhstan Junggar plate is divided into two second grade tectonic units of south Junggar epicontinental active belt and Late Paleozoic trench arc basin system of Northeast Junggar,as well as three third grade tectonic units of Takzhale fore arc trench belt,Kokesalgai Paleozoic overlaped island arc belt and Tianshan bake arc basin.These tectonic units(tectonic belts) formed a complex with polytectonics.All the tectonic units have their own evolution courses ,relavant formation series and particular rock sheet combinations.For different tectonic unit,it is also subdivided into several structural levels.Thus,the structure of east Junggar Orogenic Belt is sketched out both in vertical and horizontal