Geology and Alteration of the Duobuza Porphyry Copper-Gold Deposit in Tibet

详细信息   

• 责任者：Zhu Xiangping (Chengdu Institute of Geology and Mineral Resources ; Chengdu 610081 ; China) ; Chen Huaan
• 刊名：Geology and Prospecting
• 出版年：2012
• 卷期：48(2)
• 关键词：斑岩铜矿床 ; porphyry copper deposit ; 金矿 ; gold ores ; 西藏 ; Tibet
• 页码：p.199-206
• 图表：3 illus., 14 refs.
• 分类号：1001
• issnNo：ISSN0495-5331
• isbnNo：CN11-2043/P

摘要

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 Formation. 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.