中祁连苏里地区构造蚀变岩型金矿的发现及成因浅析
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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.
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.
引文
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[2]肖朝阳,邹湘华,贾群子,等.祁连成矿带矿产资源现状及思考[J].西北地质,2003,36(3):86-100.
[3]冯益民.祁连造山带研究概况——历史、现状及展望[J].地球科学进展,1997,12(4):307-314.
[4]李焕学,郑英,张金明,等.青海省天峻县苏里地区矿产远景调查报告[R].西宁:青海省地质调查院,2015.
[5]张瑞彦.金矿化探异常评价浅议[J].新疆有色金属,2002,21(2):11-15.
[6]翟裕生.关于控矿构造研究的思考[J].矿床地质,1994,13(s):117-119.
[7]范少军.全宝山金矿成因浅析[J].西部探矿工程,2008,20(4):121-123.
[8]陈向阳,陈传浩,刘璐.构造蚀变岩型金矿经验找矿——以嵩县栗子沟金矿矿集区为例[J].内蒙古科技与经济,2018(10):71-72.
[9]贾群子,杨钟堂,肖朝阳,等.祁连成矿带成矿区划和找矿潜力[J].西北地质,2002,35(4):38-49.
[10]陈耀宇,李永琴.甘肃北祁连金矿类型划分及特征对比[J].甘肃地质学报,2005,14(2):53-57.