哀牢山成矿带南段长安金矿控矿因素及其找矿指示意义  

Ore-controlling factors of the Chang'an gold deposit in southern Ailaoshan metallogenic belt and It's prospecting significance

作　　者：李华[1] 范文玉[1] 张建龙[1] 张星培 艾斯卡尔[1] 周一敏[1] 

机构地区：[1]中国地质调查局成都地质调查中心,成都610081 [2]云南黄金矿业集团有限公司,昆明650215

出　　处：《地质找矿论丛》2017年第4期535-543,共9页Contributions to Geology and Mineral Resources Research

基　　金：中国地质调查局地质矿产调查专项项目(编号:12120113094800;1212011120608)资助

摘　　要：云南金平县长安金矿是哀牢山金矿带南段新近发现的一个大型金矿床,之前受勘查及开发程度的限制,对长安金矿的控矿因素认识不够全面,一直存在较多的争议。本文通过对最新资料的分析和野外地质调查,对长安金矿的控矿因素及成矿作用得出了一些新的认识:1)矿区地层倒转是由逆冲断层所致,志留系白云岩是主要含矿岩层;2)F6断裂破碎带是主要控矿断裂构造;3)金成矿作用存在三个阶段,主成矿期在喜马拉雅期之前;4)区内出露的喜马拉雅期煌斑岩、正长斑岩对金矿体产生切穿和破坏作用的同时亦发生了金的叠加富集作用,构成了"二次成矿"阶段。本次研究结合地球物理成果分析,推断长安金矿深部(500m以下)还存在隐伏金矿体,具有良好的找矿前景。The Chang＇an gold deposit of Jinping county,Yunnan province is a large gold deposit discovered recently in the southern Ailaoshan ore belt.The ore-control factors are still controversial.Through analysis of the latest data and field investigation we get new ideas as follows.1）Overturn of the strata in the area is caused by the thrusting fault and the Silurian dolomite is the main ore bearing stratum;2）the cataclastic zone of F6 is the main ore-controlling structure;3）there are three mineralization stages at least in the ore deposit area and the pre-Himalayan period is the main ore-forming epoch;4）the lamprophyre and syenitic porphyry destroyed the ore body but enrich gold thus is the secondary ore-forming stage.Combined with analysis of data of geophysical survey we infer that it is potential to encounter blind ore bodies beneath 500 mfrom the ground surface.

关 键 词：哀牢山成矿带 长安金矿 控矿因素 成矿作用 找矿意义 云南省 

分 类 号：P618.51[天文地球—矿床学] P613[天文地球—地质学]