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青海玉树旁安金矿区地球化学异常特征及找矿潜力分析
- 郭海明|李福军|李云平|张世成
- 作者单位：
- 青海省第五地质勘查院|青海省第五地质勘查院|青海省第五地质勘查院|青海省第五地质勘查院
基金项目：
- 中国地质调查局地质调查项目（资〔2013〕03-001-084）
详细信息：
- 作者简介：
- 郭海明（1987—），男，山西临汾人，工程师，硕士，从事地质矿产勘查工作；西宁市城北区朝阳西路42号，青海省第五地质勘查院，810099；E-mail：guohaiming9502@126.com
- 通讯作者：
- isnull
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Geochemical anomaly characteristics and prospecting potentials analysis in Pang’an Gold District in Yushu,Qinghai
- English Author：
- The Fifth Geological Exploration Institute of Qinghai Province|The Fifth Geological Exploration Institute of Qinghai Province|The Fifth Geological Exploration Institute of Qinghai Province|The Fifth Geological Exploration Institute of Qinghai Province
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
旁安金矿区位于北巴颜喀拉造山带大场金矿田东北缘。1∶20万水系沉积物测量结果显示，Au、As、Sb元素与邻区相比具有明显高背景特征；1∶5万水系沉积物测量显示，Au元素异常规模大、强度高，并伴生Mo、Sn、Hg、W等元素异常。利用1∶1万土壤地球化学测量缩小找矿靶区，圈出以Au元素为主的土壤综合异常15处（AP1—15），异常浓集中心突出，梯度变化大，套合好；综合异常受北西向断裂和早—中三叠世昌马河组双重控制。通过对土壤综合异常AP2、AP6查证，探获4条矿体，金资源量2.08 t，金平均品位2.76×10-6，该矿床达到小型规模，证实综合异常为矿致异常。通过对区域成矿地质条件的分析，并与邻近大场金矿区进行对比，结合土壤地球化学测量结果，认为旁安金矿区具有良好的找矿潜力。
关键词:
地球化学特征；综合异常；找矿潜力；旁安金矿区；玉树
Abstract:
The Pang’an Gold District is located in the northeast margin of Dachang Gold Field in north Bayan Har Orogen.1∶200 000 stream sediment survey shows that Au,As,Sb have obviously high background compared with adjacent areas; 1∶50 000 stream sediment survey found that Au element anomalies are large in scale and high in intensity,and are accompanied by anomalies of Mo,Sn,Hg and W.Through 1∶10 000 soil geochemical measurement,the target area of prospecting was narrowed down and 15 soil comprehensive anomalies dominated by Au (AP1-15) were delineated.The anomalies have prominent concentration centers and big gradient change,and the elements fit well.The comprehensive anomalies are controlled dually by the NW fault and the early-middle Triassic Changmahe Formation.Through the verification of AP2 and AP6 soil comprehensive anomalies,4 gold ore bodies were found,the gold reserve is 2.08 t,and the average gold grade is 2.76×10-6.The deposit reaches the scale of small-scale gold deposits,proving that the anomalies are induced by mineralization.Based on the analysis of regional ore-forming geological conditions and comparison of adjacent Dachang Gold District,as well as the soil geochemical measurement,it takes that Pang’an Gold District has favorable prospecting potentials.
Keywords:
geochemical characteristics;comprehensive anomaly;prospecting potential;Pang’an Gold District;Yushu
