摘要
云开隆起区基底具双层结构特点，深层次基底包括早—中元古代中深变质岩系和由其重熔而成的混合岩及花岗岩，其中的钾长球斑花岗岩具岩浆成因特征，结晶年龄为３９０—５１０Ｍａ。云开隆起区基底形成之后，经历了自晋宁期以来的长期而复杂的变质变形演化历史，于加里东期形成的变质核杂岩或穹隆构造，奠定了云开隆起区的基本结构格局。
The basement of the Yunkai uplift is characterized by a two-ldyer structure.The deeplevel basement consists of the Early-Mid Proterozoic medium-to high-grade metamorphic series and migmatites and granites resulting from their anataxis. Among other things, Kfeldspar spherophyric granites have the magmatogenic features with crystallization ages ranging from 390 to 510 Ma. After its formation the basement of the uplift experienced a long anccomplex evolutionary history of metamorphism and deformation since the Jinningian Staguntil the metamorphic core complex or domal structure was formed in the Caledonian Stage,thus laying a foundation for the basic structural framework of the Yunkai uplift.
出处
《中国区域地质》
CSCD
1996年第1期36-43,共8页
Regional Geology of China
基金
地矿部科技攻关项目
物质变换及动力学开放研究实验室资助
