北京市怀柔区得田沟金矿床地质特征及找矿标志  

Geological characteristics of Detiangou Gold Deposit in Huairou District of Beijing and its prospecting indicators

作　　者：马海全[1,2] 李怀永[2] 王艳华[2] 张贺[2] 许海涛[2] 孔繁玉 

机构地区：[1]北京大学地球与空间科学学院 [2]北京市地质工程设计研究院 [3]北京兴泰达物探技术咨询有限公司

出　　处：《黄金》2015年第8期12-17,共6页Gold

摘　　要：得田沟金矿床属韧性剪切带-蚀变岩型金矿床。近东西向大冰沟韧性剪切带受控于区域变质作用和区域断裂构造——崎峰茶断裂,是金矿床(体)的主要控矿和贮矿构造。正长斑岩沿崎峰茶断裂带呈脉状产出,与金矿化具有明显空间分布关系,可能是金矿化的物质来源。该矿床形成时代为晚侏罗纪,成矿阶段主要由石英-硫化物阶段和石英-硫化物-碲化物阶段组成,并在主成矿期之后经历了表生热液作用的叠加。在阐述矿床地质特征的基础上,分析矿床成因,认为在北京及周边地区,韧性剪切作用发育、多元素地球化学异常叠加、激电异常明显并含有碱性岩(正长斑岩等)的部位是同类型金矿化的有利地区,具有重要的找矿指示意义。Detiangou Gold Deposit is a ductile shear zone and altered rock type deposit. The near latitudinally extending Dabinggou ductile shear zone is controlled by regional metamorphism and the regional fault structure-Qifengcha,the main ore-hosting and controlling structure of the gold deposit（body）. Syenite porphyry, mostly exposed as dikes in Qifengcha Fault, is closely related in space with gold mineralization and maybe is the material source of gold. Detiangou gold deposit＇s metallogenic age is late Jurrasic, and its principal mineralization, which is slightly influenced by supergene hydrothermal activities afterwards, is mainly composed of quartz - sulfide stage and quartz - sul- fide-telluride stage. The paper describes the deposit＇s geological characteristics, analyzes its genesis, and points out that Beijing and its surrounding areas with combined indications such as strong ductile shearing, poly-elemental geochemi- cal anomalies, same type gold striking induced polarization anomaly and alkaline rocks（ syenite porpherite etc. ） are favorable for the mineralization. The paper bears guiding significance for prospecting.

关 键 词：得田沟金矿床 韧性剪切带-蚀变岩型金矿床 地质特征 矿床成因 找矿标志 

分 类 号：P618.51[天文地球—矿床学]