摘要
宁潭岩体是由马田、亭子、陈冲、老虎头 4个单元组成的遭受了变形变质改造的花岗岩复式岩体。岩石学、岩石化学、地球化学特征反映该岩体属后碰撞强过铝花岗岩。其源区既包含有不成熟的富含长英质物质的特性 ,也有成熟的、富含粘土的特性。岩体的形成温度为 85 0～ 92 5℃ ,同位素年龄为 35 4～ 4 4 0Ma。可能是加里东期扬子板块与华夏板块碰撞后 。
Nintan intrusive, which had undergone a long cause of strong distortion and metamorphose, is a granite complex that composes of 4 units (Matian, Tinzi, Chenchong and Laohutou). It's petrology, petrochemistry and geochemistry feature show the intrusive is post-collision and strongly-peraluminous granite. Its source area not only shows a property of un-mature felsic material but also shows a property of mature clay material. It's forming temperature is 850～925 ℃, and isotope age is 354～440 Ma. Nintan intrusive is possibly post-collision and strongly-peraluminous granite in a spread environment, after the collision between Yangtze Block and Huaxia Block in Caledonian.
出处
《广西地质》
2002年第4期11-16,26,共7页
Guangxi Geology
关键词
后碰撞
强过铝花岗岩
构造环境
复式岩体
宁潭
post-collision
strongly-peraluminous
structure environment
complex
Nintan
