投稿时间：2013-04-24
修订日期：2014-02-18
网络发布日期：2014-06-28
中文摘要:流体包裹体的研究表明冬瓜山铜（金）矿床原生流体包裹体分为气液两相水溶液包裹体（Ⅰ型）和含子矿物多相水溶液包裹体（Ⅱ型）,以Ⅰ型包裹体为主。同一矿物中多种类型包裹体共存,且均一温度相近、均一方式不同,显示成矿过程中流体可能发生过沸腾作用。流体包裹体均一温度大致可分为318.8~547.5℃、220.1~378.2℃和196.7~263.2℃三个区间,对应流体密度和均一压力分别为0.86~0.98 g/cm3和（219~661）×105 Pa、0.66~1.08 g/cm3 和（26~190）×105 Pa、0.88~0.96 g/cm3和（17~48）×105 Pa,盐度w（NaCleq）峰值为12%~16%和40%~48%。结合成矿流体的演化特征,对成矿过程进行了探讨,认为流体的不混溶是引起成矿物质沉淀富集成矿的重要因素。
Abstract:Two types of fluid inclusions were recognized in the Dongguashan copper (gold) deposit, i.e., gas and liquid two-phase fluid inclusions (type Ⅰ) and daughter minerals-bearing fluid inclusions (type Ⅱ), with type Ⅰ being dominant. Multiple types of inclusions coexist in the same mineral, and the homogenization temperatures are similar, but the homogenization styles are different, suggesting that boiling of the fluids might have occurred in the ore-forming process. The homogenization temperatures of fluid inclusions can be divided into 318.8℃ to 547.5℃, 220.1℃ to 378.2℃ and 196.7℃ to 263.2℃, with the corresponding densities from 0.86 g/cm3 to 0.98 g/cm3, 0.66 g/cm3 to 1.08 cm3 and 0.88 g/cm3 to 0.96 g/cm3, and the homogenization pressures from 219×105 Pa to 661×105 Pa, 26×105 Pa to 190×105 Pa and 17×105 Pa to 48×105 Pa respectively. Salinity peaks of fluid inclusions range from 12% to 16% (mass fraction, NaCl equiv.) and from 40% to 48%. Combined with the evolution characteristics of ore-forming fluids, this paper discusses the ore-forming process. It is believed that the immiscibility of the fluid was the main factor for the deposition of metallogenic material.
keywords:geochemistry fluid inclusions ore-forming fluid ore-forming process Dongguashan copper (gold) deposit
文章编号：
中图分类号：P618.41;P618.51
文献标志码：
基金项目:本文得到国土资源部公益性行业科研专项经费资助项目（20091100704）、中南大学中央高校基本科研业务费专项资金（2012zzts010）和中南大学有色金属成矿预测教育部重点实验室发展基金项目联合资助
引用文本：
刘忠法,邵拥军,周鑫,张宇,周贵斌.2014.安徽铜陵冬瓜山铜(金)矿床成矿流体特征及成矿过程探讨[J].矿床地质,33(3):639~650LIU ZhongFa,SHAO YongJun,ZHOU Xin,ZHANG Yu,ZHOU GuiBin.2014.Characteristics of ore-forming fluids and metallogenic process of Dongguashan copper (gold) deposit in Anhui Province[J].Mineral Deposits33(3):639~650
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