地质与勘探2013，Vol.49Issue(1)：9-18,10.
西藏甲玛铜多金属矿富矿体特征
Geological Features of the Ore Shoots from the Jiama Copper-Polymetallic Deposit in Tibet
摘要
Abstract
The Jiama copper-polymetallic deposit is one of the most significant ore deposits for the nonferrous metal development in central Tibet, and is also a superlarge porphyry-skarn type deposit occurred in the Gangdise copper metallogenic belt. Based on element chemical analysis results of 308 drill holes, this paper delineates ore shoots according to high grades of each element, taking 1 % , 0. 1 % , 1 % , and 0.8% as the determination grade of the main mineral Cu and coexisting minerals Mo, Pb, Zn, respectively. According to the horizontal distribution features of the ore shoots in the Jiama copper-polymetallic deposit, there exists the zoning of Mo→Cu→Pb + Zn from northeast to southwest with ZK1616-ZK3216 as the center. Geological profiles indicate that most of ore shoots occur in skarn rocks, and few ore shoots occur in porphyry rocks, while no ore shoots occur in the hornfels. The ore shoots display stratiform, massive, lenticular and arborization textures. The mineral assemblages in Cu ore shoots are mainly bomite + chalcopyrite + wollastonite + garnet + quartz, with the major alteration types as skarnized + silieification + epidotization + chloritization. The mineral assemblages of Mo ore shoots are molybdenite + plagioclase + potash feldspar + quartz-molybdenite + garnet + wollastonite + quartz, and the main alteration types are skarnized + silieification + mudding + potassic alteration.关键词
甲玛铜多金属矿/斑岩-矽卡岩型矿床/富矿体/分带特征/矿物组合/西藏Key words
Jiama copper-polymetallic deposit/porphyry-skarn type deposit/ore shoot/zoning feature/mineral assemblages/Tibet分类
天文与地球科学引用本文复制引用
张志,唐菊兴,郑文宝,应立娟,姚晓峰,杨毅,胡正华,唐晓倩..西藏甲玛铜多金属矿富矿体特征[J].地质与勘探,2013,49(1):9-18,10.基金项目
国家自然科学基金项目(编号41172077)、国家重点基础研究发展规划"973"项目(编号2011CB403103)联合资助. （编号41172077）
