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北祁连西段陇孔—热水达坂地区金矿床地质特征及找矿前景分析
- 袁克全|刘永强|马元林|张世龙|蓟尚文
- 作者单位：
- 青海省有色第二地质勘查院|青海省有色第二地质勘查院|青海省地质调查局|青海省有色第二地质勘查院|青海省有色第二地质勘查院
基金项目：
- 中国地质调查局项目（12120114044501）
详细信息：
- 作者简介：
- 袁克全（1987—），男，青海民和人，工程师，从事金属矿床地质勘查工作；西宁市城东区乐家湾镇金和路36号，青海省有色第二地质勘查院，810007；E-mail：371422819@qq.com
- 通讯作者：
- isnull
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Geological characteristics and prospecting potentials of the gold deposits in Longkong-Reshuidaban area,western section of North Qilian
- English Author：
- Qinghai Second Nonferrous Geological Exploration Institute|Qinghai Second Nonferrous Geological Exploration Institute|Qinghai Geological Survey|Qinghai Second Nonferrous Geological Exploration Institute|Qinghai Second Nonferrous Geological Exploration Institute
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
北祁连西段陇孔—热水达坂地区金矿床（点）产于下奥陶统阴沟群火山岩组与基性、超基性岩组成的蛇绿混杂岩带内。矿体赋存于北西（北西西）向构造破碎带内，近矿围岩为阴沟群火山岩组凝灰岩、玄武岩，含矿岩性为构造角砾岩，围岩蚀变主要有黄铁矿化、碳酸盐化、硅化，矿床成因类型为中低温热液型。通过对陇孔、黑刺沟2个典型金矿床进行分析，并对控矿因素、找矿标志进行总结，认为在蛇绿混杂岩带内存在与典型金矿床地质背景相似的地段，在这些地段内圈出了1∶5万水系沉积物综合异常10处，并对部分综合异常进行了检查，圈出了土壤综合异常26处及多条含矿构造蚀变带，表明研究区具有良好的找矿前景。
关键词:
金矿床；地质特征；找矿前景；陇孔—热水达坂地区；北祁连
Abstract:
The gold deposits (spots) in Longkong-Reshuidaban area of western section of North Qilian is produced in ophiolitic melange belt,which is composed of volcanic group in Lower Ordovician Yingou group and basic-ultrabasic rocks.The ore body exists in the NW (NWW)-trending tectonic fracture zone.The wall-rock of the ore body is the tuff and basalt of volcanic group in Yingou group,and the ore-bearing lithology is tectonic breccia.The wall-rock alterations mainly include pyritization,carbonation,silicification,and the deposit genesis belongs to the medium-low temperature hydrothermal deposit.By analyzing the typical gold deposits of Longkong and Heicigou,and summarizing the ore-controlling factors and prospecting criteria,it is considered that there is a section with similar geological background of typical gold deposits in ophiolitic melange belt.In this section,10 comprehensive anomalies according to 1:50 000 stream sediments survey were circled and examined,26 soil comprehensive anomalies and multiple ore-bearing structural alteration zones were circled,indicating that the study area has good prospecting potentials.
Keywords:
gold deposit;geological characteristics;prospecting potentials;Longkong-Reshuidaban area;North Qilian
