青海茫崖行委柴水沟西金矿地质特征及找矿方向

Geological Characteristics and Prospecting Direction of the West Chaishuigou Gold Deposit of Mangyaxingwei Area in Qinghai Province

柴水沟西金矿是一座产出于寒武纪—奥陶纪滩间山群地层建造中蚀变破碎带内的热液型金矿床。为进一步指导矿区找矿工作,在分析区内成矿地质背景、矿床地质特征的基础上,对控矿因素、找矿标志及找矿方向进行了详细探讨。结果表明:1区内矿化受寒武纪—奥陶纪滩间山群地层、蚀变破碎带构造、斜长花岗岩等因素的控制,矿(化)体的空间展布及形态、规模严格受EW、NEE向断层构造破碎蚀变带的控制而呈脉状、透镜状产出;2寒武纪—奥陶纪滩间山群地层建造-破碎带构造-矿化露头、围岩蚀变组合-地球化学异常组合为研究区有效的找矿标志组合。分析表明,研究区具有较好的找矿潜力,加强"探边、摸底、扫盲"工作,有望取得找矿勘查工作的新进展。

The west Chaishuigou gold deposit is a hydrothermal type gold deposit that is occurrenced in altered fracture zone of the Cambrian-Ordovician Tanjianshan group formation.In order to provide refer-ence for the prospecting work in the mining area,the ore-forming geological background and geological characteristics of the ore-bodies of the mining area are analyzed,based on the analysis results,the ore-controlling factors,prospecting marks and prospecting direction area studied in depth.The results show that:①the mineralization is controlled by the Cambrian-Ordovician Tanjianshan group formation,altered fracture zone,the spatial distribution,morphology and size of the ore-bodies or mineralized bodies are strictly controlled by NW-direction and NEE-direction altered fracture zones,so,the ore-bodies and miner-alized bodies are presented as nervation and lenticular;②the Cambrian-Ordovician Tanjianshan group for-mation,fracture zone structure,mineralized outcrop,surrounding rock alteration assemblage,and geochem-ical anomaly combination are the effective prospecting marks assemblage of the area.The above analysis results further show that the prospecting potential of the study area is good,the new progress of prospec-ting and exploration can be achieved by strengthening the prospecting work in the study area.