矿床地质2012，Vol.31Issue(3)：465-479,15.
西藏甲玛铜多金属矿床石英脉特征
Characteristics of quartz in stock work veins from Jiama copper polymetallic deposit, Tibet
摘要
Abstract
The Jiama polymetallic copper deposit is located in eastern Gangdise volcano-magmatic arc, which is an important component part of the Gangdise metallogenic belt. The Jiama deposit is a typical superlarge porphyry-skarn-epithermal polymetallic copper deposit related to post-collision. The combination of scanning electron mi-croscope-cathodoluminescence (CL) and LA-ICP-MS microanalysis of Al, Ti, K and Fe in veined quartz has yielded results permitting a greater understanding of the complex mineralization of the Jiama porphyry-style deposit. The data obtained demonstrate the relationship between quartz precipitation, dissolution and ore deposition with the variation of ore-forming fluid through time. Five major quartz generations were identified. Ti-in-quartz geothermometer and fluid inclusion analysis show that the crystallization temperature from JMi to JM V varies between 602℃ and 130℃. The CL and trace element signatures from JMi to JM V stages of the porphyries show features similar to those observed in porphyry-style deposits of other areas. This suggests that a common sequence of quartz crystallization occurred during the formation of early veins in many porphyry copper systems.关键词
地球化学/成矿流体/石英/甲玛铜多金属矿床/西藏Key words
geochemistry, ore-forming fluid, quartz, Jiama copper polymetallic deposit, Tibet分类
天文与地球科学引用本文复制引用
彭惠娟,汪雄武,侯林,秦志鹏,周云..西藏甲玛铜多金属矿床石英脉特征[J].矿床地质,2012,31(3):465-479,15.基金项目
本文得到地质调查项目“念青唐古拉地区成矿条件研究与找矿靶区优选(编号:N0807)”、技术开发项目“西藏墨竹工卡县甲玛铜多金属矿床地质特征及找矿方向研究项目(编号:E0804)”、公益性行业科研专项经费“我国典型金属矿科学基地研究”项目(200911007)、国家自然学基金项目(40902029)和云金集团项目“滇西地区金多金属矿成矿规律及成矿系列研究”的联合资助 （编号:N0807）
