摘要
选择多龙矿集区美日切错组地层中的玄武岩–玄武安山岩–安山岩样品进行常量元素、稀土元素和痕量元素测试。通过分析,认为多不杂铜矿床碱性玄武岩形成于板内洋岛环境,钙碱性玄武岩类形成于大陆弧环境;拿若铜矿床安山岩形成于大陆弧环境;尕尔勤铜矿床钙碱性玄武岩形成于后碰撞弧环境。初步揭示出多龙矿集区板块俯冲作用引发地幔流体作用的成矿机制,地幔交代作用及其产物是洋岛玄武岩富集的主要原因,板块俯冲作用及其产物是岛弧玄武岩富集的主要原因。
The basalt, basaltic andesite and andesite samples in the Meiriqiecuo formation of the Duolong ore deposit area were selected for the determination of major elements, rare earth elements and trace elements. Through the analysis, that the Duobuza copper deposit of alkaline basahs formed in intraplate oceanic island environment, calc alkaline basalts formed in continental arc environment; the Naruo copper deposit of andesite formed in continental arc environment; the Gaerqin copper deposit of talc alkaline basalt formed in the post collision arc environment. Th is study reveals that the mineralization mechanism of Duolong ore district subduction caused by mantle fluid metasomatism, mantle metasomatism and its products is the main reason of ocean island basalt enrichment. In addition, subduction and its products is the main reason for the enrichment of island are basalt.
出处
《有色金属工程》
CSCD
北大核心
2017年第3期77-82,共6页
Nonferrous Metals Engineering
基金
国土资源部公益性行业科研专项项目(201011013)
四川省教育厅科研项目(17ZB0223)
关键词
玄武岩
元素地球化学
多龙矿集区
西藏
basalt
geochemistry of elements
Duolong ore concentration area
Tibet
