| 祝向平.西藏多不杂斑岩铜金矿床地质与蚀变[J].地质与勘探,2012,48(2):199-206 |
| 西藏多不杂斑岩铜金矿床地质与蚀变 |
| Geology and Alteration of the Duobuza Porphyry Copper-gold Deposit in Tibet |
| 投稿时间：2011-08-17 修订日期：2011-12-06 |
| DOI： |
| 中文关键词: 多不杂 斑岩铜矿 蚀变 班公湖-怒江成矿带 |
| 英文关键词: Duobuza,porphyry copper deposit,alteration,Bangonghu-Nujiang metallogenic belt |
| 基金项目:国家973 项目“ 青藏高原南部大陆聚合与成矿作用冶(2011CB403100) 和中国地质调查局地质矿产调查评价专项
(1212011086074)联合资助 |
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| 中文摘要: |
| [摘 要]西藏多不杂斑岩铜金矿是近年来新发现的一个矿床,位于班公湖-怒江成矿带西段。多不杂矿床内发育三期花岗闪长斑岩,侵入到侏罗系曲色组变砂岩中,北东向断层是多不杂矿床的主要控岩断层。多不杂矿床由内向外发育钾化、绢英岩化、青磐岩化,钾化主要发育于第一期花岗闪长斑岩出露区域,绢英岩化环绕钾化带发育,并叠加在钾化带之上,青磐岩化在矿床西侧的玄武安山岩和南侧的火山角砾岩中呈团块状发育。多不杂矿床的的铜矿化以黄铜矿矿化为主,金矿化与铜矿化密切共生。黄铜矿化主要发育于第一期花岗闪长斑岩及其与变砂岩接触带内,第一期花岗闪长斑岩为多不杂矿床的成矿斑岩。 |
| 英文摘要: |
| Abstract:The Duobuza porphyry copper deposit,located in the west of the Bangonghu-Nujiang metallogenic belt,is a newly discovered deposit. Three
stages of granodiorite porphyries intruded into Jurassic Quse Fm. metamorphosed quartz sandstones,and the northeast trending faults exert a major control
on rocks in the Duobuza deposit. Potassic alteration,phyllic alteration and propylitic alteration developed in the Duobuza deposit from inward to outward. Potassic alteration mainly occurred in the first stage of granodiorite porphyry,and was surrounded and overprinted by phyllic alteration. Propylitic alteration occurred in the south and west locally. Gold mineralization was closely associated with copper mineralization,and copper mineralization mainly occurred as chalcopyrite. Chalcopyrite mineralization occurred in the first stage of granodiorite porphyry and its outskirt,indicating that the granodiorite porphyry of the first stage was the main mineralization rock for this deposit. |
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