地学前缘 ›› 2011, Vol. 18 ›› Issue (3): 250-260.

• 论文 • 上一篇    下一篇

云南金平龙脖河铜矿区变钠质火山岩组分迁移及与成矿的关系

朱路华，戚学祥，彭松柏，熊洪，李志群   


  1. 1. 中国地质科学院 地质研究所， 国土资源部大陆动力学重点实验室， 北京 100037
    2. 中国地质大学(武汉)地球科学学院， 湖北 武汉 430074
    3. 墨江县矿业有限责任公司， 云南 墨江 654800
    4. 云南省有色地质局， 云南 昆明 650051
  • 收稿日期:2010-04-28 修回日期:2010-05-24 出版日期:2011-05-22 发布日期:2011-05-20
  • 作者简介:朱路华（1985—），男，硕士研究生，构造地质学专业。Email：z398524230@sina.com
  • 基金资助:

    中国地质调查局项目（1212010918009）；科学技术部深部探测技术与实验研究专项（SinoProbe0503）

 Compositional migration of sodium enriched metavolcanic rocks and its relationship with mineralization in Longbohe Copper Deposit, Jinping, Yunnan Province.


  1. 1. Key Laboratory for Continental Dynamics of  Ministry of Land and Resources， Institute of  Geology，Chinese Academy of Geological Sciences， Beijing 100037， China
    2. Faculty of Earth Science， China University of Geosciences(Wuhan)， Wuhan  430074， China
    3. Mojiang Mining Limited Company, Mojiang 654800, China
    4. Yunnan Bureau of Nonferrous Geology， Kunming  650051， China
  • Received:2010-04-28 Revised:2010-05-24 Online:2011-05-22 Published:2011-05-20

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摘要：

金平龙脖河铜矿位于哀牢山—金沙江构造带的东南端。赋矿围岩为变钠质火山岩，成矿主要类型为构造破碎蚀变岩型铜矿；围岩蚀变以绿泥石化、碳酸盐化、硅化、磁铁矿化等为主。通过对产于变钠质火山岩中不同蚀变程度和矿化程度岩、矿石的地球化学组分进行对比，计算不同岩、矿石体积的变化和组分的迁移。计算结果表明：从弱矿化变钠质火山岩到强矿化变钠质火山岩，随蚀变和矿化的增强，岩石体积分别扩容了14%、12%；组分SiO2、HREE及成矿物质Cu和S等的含量具有逐渐增加的趋势，微量元素中亲铁元素Cr、Ni也有不同程度的迁入富集；而组分CaO、MnO和LREE等的含量则逐渐降低，说明成矿过程中SiO2、HREE及成矿物质Cu和S等是由流体带入的，而CaO、MnO和LREE等则是由流体从围岩中带出的，以及成矿物质主要来源于深部流体。

关键词: 云南金平, 龙脖河铜矿, 变钠质火山岩, 组分迁移, 成矿作用

Abstract:

Longbohe copper deposit, a structure fractured alteredrock type of copper deposit, is located in the southeast end of AilaoshanRed River tectonic zone, Jinping,Yunnan. The wallrock is sodiumenriched metavolcanic rock, and the alteration consists of chloritization, silicification, pyritization, and sericitization. The voluminal change and compositional migration between metavolcanic rock and mineralizational metavolcanic rocks are calculated based on the geochemical compositions. The results show that, from weakly mineralized metavolcanic rocks to strong mineralized metavolcanic rocks, the volumes increase by about 14% and 12%, respectively, and the contents of SiO2, HREE, metallogenic elements (Cu and S), and proiron elements such as Cr and Ni increase gradually, but the contents of CaO, MnO， LREE, etc., decrease gradually. It suggests that the SiO2, HREE and metallogenic materials, such as Cu， S, etc., are moved into the wallrock by the orebearing fluid, and the CaO, MnO， LREE, etc. are moved out from the wallrock, and the metallogenic materials come mainly from the magmatic hydrothermal.

Key words: Jinping of Yunnan, Longbohe copper deposit, sodiumenriched metavolcanic rocks, compositional migration, mineralization

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