内蒙古大青山一带早元古宙钾长花岗岩系的深熔成因及其构造环境  

ANATEXIS ORIGIN AND TECTONIC ENVIRONMENT OF EARLY PROTEROZOIC K-FELDSPAR GRANITIC ROCKS IN DAQINGSHAN AREA

作　　者：曹林[1] 曲以秀[1] 

机构地区：[1]长春地质学院地球科学系,东北大学秦皇岛分校

出　　处：《长春地质学院学报》1996年第1期24-30,共7页

基　　金：国家自然科学基金

摘　　要：内蒙古大青山一带钾长花岗岩系同早元古宙再造岩系密切相伴生，其地质学、岩石学和地球化学特征表明，该区早元古宙时陆－陆碰撞挤压－逆冲作用引发陆壳物质的变质－深熔作用，生成钾长花岗质岩浆，经团结先后生成了黑云母二长花岗岩－正长花岗岩－碱长花岗岩系列岩石。因其经受了由北向南的挤压－逆冲作用，也就构成了东西向的钾长花岗岩带。The K-feldspar granitic rocks in Daqingsban area are closely coexisted with the early proterozoic reworhed rock series. The geological,petrological and geochemical tharacteristics indicate that the K-feldspar granitic magma was generateel by the metamorphic anatexis of continental materials during the early proterozoic continent-continent collision-compression-thrusting,During crystallization,biotite adamellites syenogranites-alkali-feldspor granites were formed from early to late.The sovthward compression-thrusting made the K-feldspar granites outcrop in the direction E-W at the present time.

关 键 词：早元古宙 钾长花岗岩系 溶熔作用 构造环境 

分 类 号：P588.121[天文地球—岩石学]