地质科技情报2017，Vol.36Issue(2)：160-167,8.DOI:10.19509/j.cnki.dzkq.2017.0221
东昆仑东段果洛龙洼脉状金矿床断裂构造控矿规律
Ore Controlling Regularities of Fault in the Guoluolongwa Lode Gold Deposit, East Segment of Eastern Kunlun Orogen
摘要
Abstract
Guoluolongwa gold deposit,located in the east segment of eastern Kunlun orogen,is a typical large lode gold deposit.We made large-scale structure-alteration investigation and mine channel and core observations in the mine area for the research of structural ore control system.There are four tectonic activities:EW left-ductile shearing,EW right-ductile shearing,EW reverse fault and EW normal fault.The spatiotemporal relationship between orebodies and structure indicates that the third EW brittle reverse fault formed in T2-Ta by NS compressive stress field is the ore-forming structure.The fracture is the secondary fault of the middle Kunlun fault activity in early Yanshanian.Alteration and mineralization are weakened from the fault inside out.Therefore,the rock alteration of potassic alteration,epidotization and pyrito-sericitoquartzitization near the ore body could be prospecting criteria.Due to the ore-controlling structure nature,there are some ore controlling regularities of structure.In surface,ore body strike is EW.In sectional direction,ore body is large at slow occurrence and converges in steep place.In vertical projection,the orebody has lateral trending with a plunge angle 75° from west to east.Mineralization has two enrichment zones in elevation of 3 400 m and 3 700 m.The height of mineralization is gradually descending from west to east of lateral trending with a plunge angle 3°.Based on the above understanding,we have built a 3D model of mineralization enrichment,and assume it has good prospecting potential in the deep mining area.关键词
脉状金矿床/断裂构造控矿/果洛龙洼/东昆仑东段Key words
lode gold deposit/ore controlling of fault/Guoluolongwa/east segment of eastern Kunlun orogen分类
天文与地球科学引用本文复制引用
唐洋,付乐兵,杨宝荣,祁月清,谢智勇,李文君,马忠贤..东昆仑东段果洛龙洼脉状金矿床断裂构造控矿规律[J].地质科技情报,2017,36(2):160-167,8.基金项目
国家自然科学基金项目(41302065) （41302065）
中国地质调查局整装勘查区关键基础地质研究、找矿预测与技术应用示范项目(12120114081401) （12120114081401）
中国地质调查局项目“青海省东昆仑典型金矿床成矿控制条件与找矿方向综合调查”(12120114000701) （12120114000701）
