北祁连山石居里沟富铜矿床成矿特征  

METALLOGENIC FEATURE OF SHIJULIGOU COPPER-RICH ORE DEPOSITS IN NORTHERN QILIAN MOUNTAINS

作　　者：杨合群[1] 李文渊[1] 赵东宏 宋忠宝[1] 

机构地区：[1]中国地质调查局西安地质矿产研究所,西安710054

出　　处：《地质与勘探》2000年第6期20-22,31,共4页Geology and Exploration

摘　　要：讨论北祁连山石居里沟富铜矿床成矿特征 ,通过分析认为 :成矿环境为中奥陶世弧后扩张脊 ;容矿岩石为蛇绿岩套上部火山岩或火山—沉积岩系 ;矿体赋存部位受海底裂隙系统的控制 ;含矿热液起源于海水与玄武岩在高温下的反应 ,成矿金属元素主要来自火山岩 ,矿化剂硫来自二者。Discusses metallogenic feature of Shijuligou copper-rich ore deposits in Northern Qilian Mountains. The main conclusions are as follows: The metallogemic setting was back-arc spreading ridge in Meso-Ordovician Epoch; The host rock belongs to volcanic rocks or volcanic-sedimentary rocks in the upper part of ophiolite suite; The location of ore bodies were controled by the system of fissures in the sea floor; The hydrothermal ore-forming solution originated from reaction between sea-water and basaltic rocks under high temperature, in which, the ore-forming metal elements came from the basaltic rocks and the mineralizer sulfur from both the former and the latter.

关 键 词：北祁连山 石居里沟 弧后扩张脊 铜矿 

分 类 号：P618.41[天文地球—矿床学]