中祁连苏里地区构造蚀变岩型金矿的发现及成因浅析  

Discovery and analysis of the formation of tectonic alteration rock gold deposits in Suli region of central Qilian

作　　者：李焕学[1] 郑英[1] 严玉峰[1] LI Huanxue;ZHENG Ying;YAN Yufeng(Key Laboratory of Geological Process and Mineral Resources in Northern Qinghai -Tibet Plateau,Qinghai Institute of Geological Survey,Xining 810012,China)

机构地区：[1]青海省地质调查院青藏高原北部地质过程与矿产资源重点实验室青海省地质调查院,青海西宁810012

出　　处：《青海大学学报（自然科学版）》2018年第5期72-80,共9页Journal of Qinghai University(Natural Science)

基　　金：中国地质调查局项目(1212011221055)

摘　　要：为了查明中祁连苏里地区金矿资源潜力,在开展1∶5万矿产远景调查中,新发现一处构造蚀变岩型金矿。通过大比例尺地质填图及原子吸收分光光度法、电感耦合等离子体发射光谱法等样品测试方法对五个山河西金矿地质特征、矿床特征、矿床成因等方面进行了调查研究。结果表明:五个山河西金矿位于北西向区域性断裂带及其派生的北北西向、近南北向脆性断裂交汇的构造三角区内,受岩浆岩影响较弱,严格受控于北北西向次级断裂带; As,Sb,Hg等次生晕异常是金的指示元素标志,地表呈现Au,As,Hg及Zn矿床共生分异现象。作为中祁连成矿带内新发现的构造蚀变岩型金矿,为该类型矿床的开发利用及中祁连地区金矿资源勘查研究提供了较为可靠的地质依据。In order to identify the potential of gold deposits in Suli region of central Qilian, a tectonic alteration rock gold deposits was discovered of in the survey of 1∶ 50 000 mineral exploration. The geological characteristics, characteristics of deposits and the genesis of the deposits were investigated by means of large-scale geological mapping, atomic absorption spectrophotometry and inductively coupled plasma emission spectrometry. The results show that the gold deposits are located in the tectonic triangle region which is the N-W fault and it was derived N-N-W and near N-S to brittle fracture intersection, less affected by magmatic rocks and strictly controlled by the N-N-W secondary fault zone;As, Sb, Hg and other secondary halo anomalies are the indicator elements of gold, showing the symbiosis of Au, As, Hg and Zn;The newly discovery of tectonic alteration rock gold deposits in the Qilian metallogenic belt provides the more reliable geological basis for the exploitation and utilization of this type of deposit and the exploration of gold resources in the central Qilian.

关 键 词：中祁连 五个山组 构造蚀变岩型 金矿床 

分 类 号：P618.51[天文地球—矿床学]