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西藏甲玛矿区角岩特征及其对深部找矿的意义
引用本文:王登红,唐菊兴,应立娟,林彬,丁帅.西藏甲玛矿区角岩特征及其对深部找矿的意义[J].岩石学报,2011,27(7):2103-2108.
作者姓名:王登红  唐菊兴  应立娟  林彬  丁帅
作者单位:1. 中国地质科学院矿产资源研究所,国土资源部成矿作用与资源评价重点实验室,北京100037
2. 成都理工大学地球科学学院,成都,610059
基金项目:本文受国家973课题(2011CB403103)、中央公益性行业科研专项课题(200911007-02)、国家科技专项(SinoProbe0301、SinoProbe0303)、中国地质大调查项目(1212010633903、20089947)和中央级公益性科研院所基本科研业务费专项资金(K0911)联合资助.
摘    要:角岩是西藏甲玛铜多金属矿床近年来钻探工作大量揭露的赋矿围岩之一,其中蕴藏的钼铜资源量已达大型以上规模,不但为甲玛增加资源量提供了新的保障,而且在矽卡岩型和斑岩型之外增加了一种新的矿石类型。但角岩的研究相对薄弱,对其在深部找矿方面的研究更是空白。本文通过对甲玛角岩基本特征的研究,归纳了角岩的空间分布,分析了角岩的物质组成,结合角岩中裂隙的统计结果,推测了深部岩体的中心位置,为深部找矿提出了建议。认为甲玛矿区角岩分布广但厚度不均匀,以ZK3218钻孔最厚(达1027m),向周围逐渐减薄,到矿区西南角和西端多个钻孔中尖灭。角岩型矿体以辉钼矿和黄铜矿为主,ZK3217钻孔中矿体厚达900m,紧邻ZK3218钻孔,矿化普遍,但品位较矽卡岩低。角岩中裂隙统计表明,在ZK1616至ZK3216一带,裂隙密度达40条/米以上,向周围减少。综合角岩的岩石学、矿物学和地球化学等特征, 认为甲玛矿区为角岩提供热源的深部岩浆分布在ZK3216-ZK3217-ZK3218一带,建议布置深钻,深部可能存在矽卡岩型矿体和斑岩型矿体。

关 键 词:角岩  铜钼  深部找矿  甲玛  西藏
收稿时间:5/1/2011 12:00:00 AM
修稿时间:2011/6/25 0:00:00

Hornfels feature in the Jiama ore deposit, Tibet and its significance on deep prospecting
WANG DengHong,TANG JuXing,YING LiJuan,LIN Bin and DING Shuai.Hornfels feature in the Jiama ore deposit, Tibet and its significance on deep prospecting[J].Acta Petrologica Sinica,2011,27(7):2103-2108.
Authors:WANG DengHong  TANG JuXing  YING LiJuan  LIN Bin and DING Shuai
Affiliation:MLR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;MLR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;MLR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Department of Earth Sciences, Chengdu Technology University, Chengdu 610059, China;Department of Earth Sciences, Chengdu Technology University, Chengdu 610059, China
Abstract:Hornfels has become one of the most important host rocks in the Jiama copper polymetallic deposit since the drilling exploration exposed it more in recent years. The molybdenum and copper resources hosted in hornfels have assessed to reach the large scale, so it will provide more resources for the mine as a new ore type besides skarn type and porphyry type ore in Jiama. However, study on hornfels in Jiama is at the very low level, especially on its significance on deep prospecting. Hornfels feature in Jiama...
Keywords:Hornfels  Copper-molybdenum  Deep prospecting  Jiama  Tibet
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