| 西藏尕尔穷铜金矿元素空间分布规律及地球化学勘查模型 |
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| 关键词:Gaerqiong Banggonghu-Nujiang metallogenic belt gold Zoning characteristics porphyry-skarn deposit |
| 基金项目:国家自然科学基金项目(编号: 41172077)；国家973项目(编号: 2011CB403103)；国土资源部公益性行业科研专项项目(编号: 201011013-3) |
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| Element Spatial Distribution of the Gaerqiong Copper-gold Deposit in Tibet and Its Geochemical Exploration Model |
| The Gaerqiong copper-gold deposit in the western section of the Bangong Co-Nujiang River metallogenic belt is the only deposit that has reached the level of detailed investigation, with its gold resource reaching the large size. According to the analytical results of elements in 30 drill holes, the authors made a systematic analysis of the plane distribution characteristics of ore-forming elements and found that the Gaerqiong deposit has obvious element zoning characteristics related to magmatic hydrothermal metallogenesis. The ore body from southeast to northwest and from the depth to the shallow part has the zoning feature of Mo→Cu(Au)→Cu+ Au+Ag→Au+Cu+Ag →Au+Ag. Through studying the mineralization in the lateral and vertical directions of the II—II＇vertical profile and No. 8 exploration line, the authors found that the ore body in the section and the plane has similar zoning characteristics. The geochemical exploration model indicates that from southeast to northwest there exists the anomaly zonality of Mo+Bi→Bi+Cu+Au+As→As+Au+Cu+Sb+Zn→Au(Cu)+ Zn→Au+Pb. Researches suggest that the hydrothermal center of the Gaerqiong deposit should be located in the 8—12 lines, the direction of fluid migration was from the southeast to the northwest, and the Gaerqiong copper-gold deposit is a typical porphyry-skarn deposit. |
| ZHANG Zhi,TANG Ju-xing,YANG Yi,LI Zhi-jun,YAO Xiao-feng,DENG Shi-lin,WANG Hong-xing,SONG Jun-long.2012.Element Spatial Distribution of the Gaerqiong Copper-gold Deposit in Tibet and Its Geochemical Exploration Model[J].Acta Geoscientica Sinica,33(4):663-672. |
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