Fluid Inclusion and Carbon-Oxygen Isotope Studies of the Hujiayu Cu Deposit,Zhongtiao Mountains,China:Implications for Synmetamorphic Copper Remobilization
作者单位：Key Laboratory of Mineral ResourcesInstitute of Geology and GeophysicsChinese Academy of Sciences College of Earth ScienceUniversity of Chinese Academy of Sciences Zhongtiaoshan Non-ferrous Metals Group Co.Ltd
会议名称：《中国科学院地质与地球物理研究所2015年度（第15届）学术年会》
会议日期：2016年
学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程]
关 键 词：Fluid inclusion assemblage carbon-oxygen isotope syn-metamorphic Cu deposit Hujiayu Cu deposit Zhongtiao Mountains
摘 要：The Hujiayu Cu deposit,representative of theHuBi-typeCu deposits in the Zhongtiao Mountains district in the southern edge of the North China Craton,is primarily hosted in graphitebearing schists and carbonate *** ore minerals comprise mainly chalcopyrite,with minor sphalerite,siegenite[(Co,Ni)S],and clausthalite[Pb(S,Se)].The gangue minerals are mainly quartz and dolomite,with minor *** fluid inclusion types were recognized in the chalcopyrite-pyrite-dolomite-quartz veins,including CO-rich inclusions(typeⅠ),low-salinity,liquid-dominated,biphase aqueous inclusions(typeⅡ),solid-bearing aqueous inclusions(typeⅢ),and solid-bearing aqueous-carbonic inclusions(typeⅣ).Type I inclusion can be further divided into two sub-types,i.e.,monophase CO inclusions(typeⅠa)and biphase CO-rich inclusions(with a visible aqueous phase),and typeⅢinclusion is divided into a subtype with a halite daughter mineral(typeⅢa)and a subtype with multiple solids(typeⅢb).Various fluid inclusion assemblages(FIAs)were identified through petrographic observations,and were classified into four *** group-1 FIA,consisting of monophase CO inclusions(typeⅠa),homogenized into the liquid phase in a large range of temperatures from-1 to 28℃,suggesting post-entrapment *** group-2 FIA consists of typeⅠb,Ⅲb andⅣinclusions,and is interpreted to reflect fluid *** group-3 FIA comprises typeⅡandⅢa inclusions,and the group-4FIA consists of typeⅡinclusions with consistent phase *** group-1 and group-2 FIAs are interpreted to be entrapped during mineralization,whereas group-3 and group-4 FIAs probably represent the post-mineralization *** solid CO melting temperatures range from-60.6 to56.6℃and from-66.0 to-63.4℃for typeⅠa and typeⅣinclusions,*** homogenization temperatures for typeⅡinclusions range from 132 to 170℃for group-3 FIAs and115 to 219℃for group-4 *** halite melting temperatures range from 530 to 562℃for typeⅢb andⅣinclusions,whe