摘要
通过对该矿床成矿地质背景、矿床地质特征、成矿标志及控矿因素等诸方面分析,指出成矿物质主要来源于下奥陶统岛弧钙碱性安山-英安质火山碎屑岩,矿体受多级断裂裂隙系统的控制,且主要定位于韧-脆性剪切带内的强片理化带中,成矿作用发生于碰撞造山作用挤压-伸展转变期,花岗闪长岩、闪长岩等造山期中酸性岩体侵位期间及其以后,深部岩浆房或中酸性侵入体主要为矿床形成提供了热驱动力,矿床成因类型属与火山岩有关的构造蚀变岩型金矿床。在此基础上,总结归纳了该矿床的成矿模式与综合找矿标志。
Hanshan gold deposit is a great gold deposit to be found in North Qilian mountains during the last decade of the twentieth centuryBy analysing oreforming setting , geological features , oreforming marks and orecontrol factors of the deposit, authors consider its oreforming matter mainly comes from calcalkaline intermediateacidic pyroclastic rocks of island arc, orebodies are controlled by multidegree faulted system and mainly occurrence in strongly schistosity of ductilebrittle shear zone, mineralization happened in or after the period of intermediateacidic magma positioning and solidifying during the compressionextend climacteric of collision orogenesis,the heatdriving force mainly comes from deep magma chamber or intermediateacidic intrusive bodiesThe genetic type of the deposit is a tectonicaltered gold deposit related to volcanic rocksFrom what has been discussed above,authors summarize and induce metallogenic model and comprehensive prospecting criteria of the deposit
出处
《西北地质》
CAS
CSCD
2003年第1期41-51,共11页
Northwestern Geology
基金
原地质矿产部资源与环境科技攻关项目(课题编号:95-2-004)资助
关键词
寒山金矿床
控矿条件
成矿模式
北祁连山
甘肃
gold deposit
ore-control condition
metallohenic model
Hanshan
North Qilian mountains