| 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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| 引用本文：张志,唐菊兴,杨毅,李志军,姚晓峰,邓世林,王红星,宋俊龙.2012.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[J].地球学报,33(4):663-672. |
| DOI：10.3975/cagsb.2012.04.26 |
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| 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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| 中文摘要:尕尔穷铜金矿床是班公湖-怒江成矿带西段唯一达到详查级别的矿床, 其金资源量已达大型规模。根据30个钻孔的成矿元素化学分析结果, 对各成矿元素平面分布特征进行了系统分析发现, 尕尔穷矿床具有较明显的与岩浆热液成矿作用有关的元素分带特征, 矿体从南东→北西向、深部→浅部具有Mo→Cu(Au)→Cu+Au+Ag→Au+Cu+Ag→Au+Ag的分带特征。对II—II＇纵剖面及8号勘探线进行了矿化在横向及垂向上的分布特征研究发现, 矿体在剖面上亦具有与平面上相似的分带特征。矿区地球化学勘查模型显示: 自矿区南东部至北西部具有Mo+Bi→Bi+Cu+Au+As→As+Au+Cu+Sb+Zn→Au(Cu)+ Zn→Au+Pb的异常分带特征, 此异常分带同时也为内环异常→外围异常的异常分带。研究提出, 尕尔穷矿床热液中心应位于8—12线, 流体运移方向为南东→北西向, 尕尔穷铜金矿床为较典型的斑岩-矽卡岩型矿床。 |
| 中文关键词:尕尔穷 班怒成矿带 金 分带特征 斑岩-矽卡岩矿床 |
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| Element Spatial Distribution of the Gaerqiong Copper-gold Deposit in Tibet and Its Geochemical Exploration Model |
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| Abstract: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. |
| keywords:Gaerqiong Banggonghu-Nujiang metallogenic belt gold Zoning characteristics porphyry-skarn deposit |
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