摘要
通过对矿区构造变形特征的分析,将本区构造变形划分为海西、印支、燕山、喜马拉雅四个变形期,相应的变形表现为顺层的剪切褶皱、韧脆性层间滑动构造、脆性断裂与节理、推覆走滑构造。海西期喷流—沉积型铜矿床形成的构造背景为金沙江弧后裂陷盆地环境,印支期及其以后叠加控矿作用表现在平面上为“入”字型构造控矿,剖面上为多层层间滑动构造控矿。
Structural deformation in Yangla copper district can be divided into four periods, or the Her-cynian bedding shearing, Indosinian ductile-brittle interlayer gliding, Yanshanian brittle deformation and Himalayan strike-slip thrusting. The Yangla sedimentary exhalative (SEDEX) deposit was formed in the Jinshajiang Hercynian back-arc rift basin, and its superimposed mineralization from Indosian to Himalayan period was controlled by 'λ'type structural framework in plane and multi-interlayer slip in cross section.
出处
《华南地质与矿产》
CAS
1998年第4期59-65,共7页
Geology and Mineral Resources of South China
基金
地质矿产部定向基金项目(地科定95-12)
"九五"资源与环境攻关项目(95-02-001-03)
关键词
羊拉铜矿区
构造变形
变形期
云南
铜矿床
控矿构造
控矿作用
Yangla copper deposit structural deformation deformation periods struc-tural ore-controlling western Yunnan
