东准噶尔壳体构造演化与花岗岩构造成因类型

东准噶尔构造上位于欧亚大陆腹地中亚复式壳体准噶尔地洼区的东北部 ,古生代 ,花岗岩浆活动强烈 ,花岗岩类主要形成于壳体大地构造演化的地槽体制阶段的激烈期和余动期 ,按历史-动力学条件、构造环境和成因“三位一体”综合成因类型划分新原则可将其划分为四种构造成因类型 :地槽造山前陆缘裂谷幔源分异型、地槽同造山汇聚碰撞壳 -幔混熔型、地槽同造山汇聚碰撞壳源型和地槽造山后陆内裂谷幔源分异型 ,各类花岗岩因其形成的历史 -动力学条件、构造环境及机制与方式有别 ,而有不同的岩石组合和成岩成矿特征

CRUSTOBODY TECTONIC EVOLUTION ANDTECTONIC--GENETIC TYPES OF GRANITOIDS IN EASTERN JUNGGAR, XINJIANG, CHINA

In genetic classification granitoids should be divided according to their historicaldynamic characteristics, tectonic setting and granitic magma origin. East Junggar is characterized by extensive development of granitic magmatism. Granitoid mainly occurred in the geosyncline stage. According to their historical-dynamic characteristics, tectonic setting and graniticmagma origin, they can be divided into four multiple origin types: ①geosynclinal stage-preorogenic movement period-epicontinental geosynclinal rift-differential from mantle source magma-type; ②geosynclinal stage-synorogenic movement period-syntaxes and collision orogenic building-mantle-crust mix-type; ③geosynclinal stage-synorogenic movement period-syntexis and collision orogenic building-crust source magma-type; ④geosynclinal stage-postkinematic period-intracontinent al rift-differential from mantle source magma-type. They are different respectively in rock association, lithogeochemistryand lithogenesis-mineralization.