摘要
滇西北独龙江地区的燕山期花岗岩可划分为 6个单元 ,归并为早、晚 2个序列。早期———龙岗不若序列由巴坡、东哨房等 2个单元组成 ,生成于晚侏罗世～早白垩世 ,为壳幔混源岩浆形成 ,属火山弧花岗岩 ,是班公湖 东巧 怒江结合带俯冲消减的产物。晚期———独龙江序列由机独、其期、麻毕当、斯拉罗等 4个单元组成 ,生成于晚白垩世 ,为壳源花岗岩 ,形成于同碰撞环境。是班公湖 东巧
The Yanshanian granites in the Dulong river area of the northwest Yunnan can be divided into 6 units belonging to 2 series. The former Longgang-Buruo series includes 2 units of Bapo and Dongshaofang, which was formed by the crust-mantle origin magma in late Jurassic～early Cretaceous. It belongs to the volcanic arc granite, formed by the subduction of the Bangonghu-Dongqiao-Nujiang suture zone. And the latter Dulongjiang series is composed of 4 units of Jidu, Qiqi, Mabidang and Silaluo. It was formed in a syncollision environment of the late Cretaceous and originated from the mantle, which recorded the collision orogeny of the Bangonghu-Dongqiao-Nujiang suture.
出处
《云南地质》
2002年第1期21-33,共13页
Yunnan Geology
基金
中国地质调查局
1:2 5万贡山县中甸县幅区域地质调查
