地质与勘探2011，Vol.47Issue(4)：577-592,16.
东准噶尔北缘两类花岗质岩石及其地质意义
Two Types of Granitoid Rocks in the Northern Margin of the Eastern Junggar Area and Their Geological Implications
摘要
Abstract
We have made a comparative study on petro-geochemical characteristics of the granitoid rocks in the northern margin of the East Junggar area. The result shows that two types of granitoids exist in the area, i. e. , orogenic cale-alkali granite and alkali-rich granitoid. There are similar magmatic affinities between some eale-alkali granitoids and adakite in northern Xinjiang, while alkali-rich granite exhibits similar rock geochemistry characteristics of alkali granite. These two types of granites occur in the subduction environment evolved from a continental collision orogenic belt and intraconti- nental post-collision environment, respectively. They coexist in the same orogenic belt evolution system in space. Cale-alkali granite was produced in the island-are environments and continental post-collision tectonic environments. Alkali-rich granite was the typical product of post-collision deep magrnatie activities, indicating the end of collosional orogene movement. Diversity of tectonic environments of cale-alkali granites primarily explained the tectonic environmental differences between Kalaxiangeer with potential of large scale porphyry mineralization and southeast to Laoshankou with IOCG mincralizalion.关键词
岩石地球化学/两类花岗质岩石/构造环境后碰撞作用/东准噶尔北缘Key words
petro-geochemistry/two types of granitic rock/tectonic environment/post-collision/north margin of East Junggar分类
天文与地球科学引用本文复制引用
张栋,路彦明,范俊杰,潘爱军,张玉杰,朝银银..东准噶尔北缘两类花岗质岩石及其地质意义[J].地质与勘探,2011,47(4):577-592,16.基金项目
本文为地质大调查项目（编号：1212010732503、1212010781069和1212010913028）资助的成果 （）
