| 藏北阿里地区新发现的尕尔穷铜金多金属矿床地质特征及其找矿前景 |
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| 引用本文：李志军,唐菊兴,姚晓峰,多吉,刘鸿飞,邓世林,张志,张金树,胡正华.2011.Geological characteristics and prospecting potential of Gaerqiong copper-gold polymetallic deposit in Ali District, northern Tibet[J].Mineral Deposits,30(6):1149~1153 |
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| 基金项目:本文得到自然科学基金 （项目编号：41172077）、中央公益性行业专项（项目编号：201011013-3）和国家973项目(编号2011CB403103)的资助 |
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| 中文摘要:尕尔穷铜金矿床是近年来在西藏阿里地区发现的一个与斑岩成矿作用有关的铜金矿床，该矿床产于冈底斯陆块北缘与班公湖-怒江成矿带的结合部位。Ⅰ号矿体呈似层状，矿体长度大于900 m，沿倾向方向延伸大于400 m，产状受接触带所控制；Ⅲ号矿体沿北东构造破碎带分布，长度超过3 km，已控制矿体的长度大于700 m。主要矿石类型为浸染状、网脉状、角砾状、块状、细脉状铜金矿石，矿石建造是（Fe-）Cu-Au建造，金属矿物由黄铜矿、斑铜矿、磁铁矿、赤铁矿、自然金等组成，主要蚀变为矽卡岩化、大理岩化、角岩化、磁铁矿化、赤铁矿化、硅化、方解石化、绿泥石化、绿帘石化。新发现的Ⅲ号矿体金品位最高为205 g/t，平均品位在4 g/t左右。该矿床的发现和评价对于班公湖-怒江成矿带的区域找矿评价具有重要意义。 |
| 中文关键词:地质学 尕尔穷铜金矿 地质特征 班公湖-怒江成矿带 西藏 |
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| Geological characteristics and prospecting potential of Gaerqiong copper-gold polymetallic deposit in Ali District, northern Tibet |
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| Abstract:The Gaerqiong copper-gold deposit, a skarn ore deposit located between the northern edge of Gandise block and the Banggong-Nujiang metallogenic belt, was discovered in Ali District of Tibet in recent years. Its ore bodies are distributed along the northwest contact zone and the northeast tectonic shattered zone, with the controlled length of ore bodies being over 1 700 m. The ores are mainly of disseminated, stockwork, brecciated, massive and veinlet forms, and the ore formation is of the (Fe-) Cu-Au type. The main metallic minerals are chalcopyrite, bornite, hematite, magnetite and native gold, with the main alteration types being skarnization, marbleization, hornfelsization, magnetitization, hematitization, silicification, calcilization, chloritization and epidotization. The highest gold grade of No. Ⅲ ore body is 205 g/t, and the average grade is about 4 g/t. The discovery of the ore body has important significance for regional prospecting criteria and ore assessment of the Banggong-Nujiang metallogenic belt. |
| keywords:geology, Gaerqiong copper-gold deposit, geological characteristics, Bangonghu-Nujiang metallogenic belt, Tibet |
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