摘要
金家河金矿床位于勉略康构造混杂岩带中段,金矿体赋存于近东西或北西向构造蚀变带中,成矿地质条件十分有利。通过对矿区地质特征、矿化蚀变带/矿体特征、围岩蚀变及矿石矿物特征等的分析,总结了矿床的控矿因素,成矿类型为受韧性剪切带、地层及中酸性岩脉综合控制的构造蚀变岩型金矿,南华纪—震旦纪的一套火山陆源碎屑沉积岩系为主要的矿源层,成矿与多期热液活动关系密切,发育在以碳酸盐绢云石英片岩为主的构造片理化带内,黄铁矿为主要的载金体。区内长断裂F 31旁侧发育的次级韧性剪切带F 41、F 51、F 61,既是导矿构造,也是容矿构造。
Jinjiahe gold deposit is located in the middle part of Mian-Lue-Kang structural hybrid zone.The gold orebodies occur in the nearly east-west or north-west structural alteration zone,with favorable geological conditions of mineralization.Through the analysis of mine geological characteristics,mineralization alteration belt/orebody characteristics,wall rock alteration and ore mineral characteristics,the authors summed up some controlling factors of the deposit.The mineralization type was tectonic altered rock type controlled integratedly by the ductile shear zone,formation and acidic dike.The main source bed was the volcano-terrigenous clastic sedimentary rock in Nanhua-Sinian period.The mineralization was closely related to some multiphase hydrothermal activities and developed in the tectonic slices of carbonate quartz schist,with pyrite being the main gold-bearing body.The secondary ductile shear zones of F 41,F 51 and F 61 in this area,developed beside the long fault F 31,were the ore-conducting structure and the ore-hosting structure as well.
作者
赵世启
袁波
陈荔湘
王民良
张孝中
闫红强
ZHAO Shiqi;YUAN Bo;CHEN Lixiang;WANG Minliang;ZHANG Xiaozhong;YAN Hongqiang(No.711 General Party,Northwest Nonferrous Geological Exploration Bureau,Hanzhong 723000,Shaanxi,China;Northwest Geological Exploration Bureau for Nonferrous Metals,Xi’an 710054,Shaanxi,China)
出处
《西北地质》
CAS
CSCD
北大核心
2020年第4期120-129,共10页
Northwestern Geology
基金
陕西省地质勘查基金项目“略阳县惠家坝金家河金锰矿普查”(61201405239)资助。
关键词
勉略康构造混杂岩带
金家河金矿床
地质特征
控矿因素
Mian-Lue-Kang structural hybrid zone
Jinjiahe gold deposit
geological features
ore-controlling factors
