摘要
朱阳关-夏馆断裂是一条长约400 km,深达上地幔的超壳深大断裂带,沿断裂带出露有较多的燕山期花岗岩(脉)体及一系列Cu、Au、Ag、Pb、Zn异常,有色金属、贵金属成矿作用明显。高庄金矿床赋存在二郎坪群含放射虫黄铁矿变细碧岩内,矿体成群成带分布在朱阳关-夏馆断裂次级断裂中,明显受断裂控制,近地表以石英脉型金矿为主,向下渐变为蚀变碎裂岩型金矿,矿体自地表向下明显变厚,金品位增富。其成因为海底火山喷流-岩浆热液-构造热液叠加改造形成的含金石英脉-蚀变构造岩型金矿。二郎坪群蛇绿岩套横贯河南省西南部,连续延伸约400 km(图1),含放射虫黄铁矿层广泛发育,Cu、Au、Ag、Pb、Zn异常分布较多,朱阳关-夏馆断裂的次级断裂中黄铁矿化、硅化、多金属硫化物蚀变明显,随着深部地质找矿的进一步开展,本区可成为我国重要的金多金属矿产基地。
Zhuyangguan-Xiaguan fault zone,which is ~ 400 km long and reaching to the upper mantle in depth,is accompanied by lots of Yanshanian granite intrusion and a series of Cu,Au,Ag,Pb,Zn et al.geochemical anomaly,is favorable for colored and noble metal mineralization.Gaozhuang gold deposit is occurrence in Radiolarian-bearing pyrite metaspilite of Erlangping Foramtion,and the ore-bodies is occurred along subsidiary fracture of Zhuyangguan-Xiaguan fault zone,while the quartz vein-type ore-bodies are mainly in the surface of the deposit,and gradual changed to the alteration-type gold deposit into the depth.The thickness of the ore-bodies are becomes thicker into the depth and accompanying the ore grade becoming richer.The geological research indicated that Gaozhuang deposit is a typical auriferous quartz vein-and alteration-type gold deposit which in formed by submarine volcano exhalative-magmatic hydrothermal-structural hydrothermal activity process.The geological evidences,such as abundance Radiolarian-bearing pyrite bed in ~400 km long Erlangping Formation,large area of Cu-Au-Ag-Pb-Zn geochemical anomaly and lots of pyritized-,silicification-and polymetal sulfide-type alteration along Zhuanyangguan-Xiaguan fault zone,all indicate the great prospecting potential for gold polymetallic ore deposits in this area.
出处
《华南地质与矿产》
CAS
2010年第4期38-44,共7页
Geology and Mineral Resources of South China
关键词
含金石英脉
蚀变岩型金矿床
矿床特征
找矿前景
西峡县高庄
auriferous quartz vein
alteration-type gold deposit
geological characteristics
prospecting potential
Gaozhuang gold deposit
Xixia county
Henan province
