摘要
昌宁—孟连带是我国西南“三江”地区重要的多金属成矿带。该带火山岩化学成分、稀土元素地球化学特征以及硅质岩的沉积地球化学特征均可与大陆边缘裂谷环境相类比。尽管区内玄武岩的微量元素地球化学特征与洋岛玄武岩相似,这是因为洋岛玄武岩与大陆裂谷玄武岩的地球化学特征本身就很相似。综合分析表明该带在晚古生代是在保山—掸邦地块东部发展起来的大陆边缘裂谷环境。
Changning-Menglian belt is an important polymetallic ore belt in Three-River area of southwestern China. Geologic structure in this belt is very complex so different recognitions are involved with its geotectonic background. By analyzing the geochemical and depositional characters ofolcanic rock and silicalite in the belt and comparing it with the typical geotectonic environment, the author considers that the belt belongs to continental margin rift environment developed on the basis of Baoshan-Shanbang block.
出处
《地质找矿论丛》
CAS
CSCD
2007年第2期134-138,共5页
Contributions to Geology and Mineral Resources Research
基金
国家自然科学基金项目(40472013)
教育部跨世纪优秀人才基金项目
四川省青年科技基金项目资助
关键词
昌宁-孟连带
地质背景
硅质岩
Changning-Menglian belt
geological background
silicalite
