摘要
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 。
In genetic classification granitoids should be divided according to their historical dynamic 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 granitic magma 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 intracontinental rift differential from mantle source magma type. They are different respectively in rock association, lithogeochemistry and lithogenesis mineralization.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2001年第1期64-73,共10页
Geotectonica et Metallogenia
基金
国家重点基础研究发展规划项目!(G19990 432 0 4)
国家攀登预选项目!(95 -预 - 2 5 )
国家重点科技攻关305项目!(96 - 915 - 0 2 - 0
