摘要
应用野外基础地质调查和地球化学方法,对云南维西雪龙山变质岩带(大宝山矿区)岩石进行原岩恢复认为:变质岩带的角闪质岩石均为副变质岩。同样是斜长角闪岩和斜长角闪片岩,原岩类型却不尽相同,表明此套变质岩形成于动荡、构造运动强烈的海陆交互相环境,由火山活动、强烈侵蚀、快速堆积而形成的一套杂砂岩、火山碎屑岩及火山、次火山岩组成,后期经历复杂强烈变质作用改造。
Based on the field geological survey and the geochemistry study, the protolith restoration of the Xuelongshan metamorphic belt in Weixi of Yunnan has shown the amphibolite to be the parametamorphic rock formed from different protolith. It shows this set of metamorphic rocks have been developed in a turbulent marine-land alternative facies environment with intensive structure movement, where volcanic activity, intensive erosion and fast accumulation on formed a set of graywacke, volcaniclatic rock, volcanic and subvolcanic rock that are intensively transformed by complicated metamorphism later.
出处
《云南地质》
2004年第3期304-309,共6页
Yunnan Geology
基金
国家自然科学基金资助项目(40072032)
