论文摘要
The Tonggou Cu polymetallic deposit in the Bogda Orogenic Belt,Eastern Tianshan shows evidence for three stages of hydrothermal mineralization:early pyrite veins（Stage 1）,polymetallic sulfide±epidote-quartz（Stage 2）,and late-stage pyrite-calcite veins（Stage 3）.Fluid inclusion petrography and microthermometry analyses indicate that the liquid-rich aqueous inclusions（L）,vapour-rich aqueous inclusions（V）,and NaCl daughter mineral-bearing three phase inclusions（S） formed during the main stage of mineralization,and that the ore fluids represent high-temperature and high-salinity H20-NaCl hydrothermal fluids that underwent boiling.Stable isotope（H,O） data indicate that the ore fluids of the Tonggou deposit were originally derived from magmatic water in Stage 2 and subsequently mixed with local meteoric water during Stage 3.Sulphur isotope compositions（6.7‰to 10.9‰） are consistent with the δ34S values of pyrite from the Qijiaojing Formation sandstone,indicating the primary source of the sulphur ore.Furthermore,chalcopyrite grains separated from the chalcopyrite-rich ore samples yield an isochron age of 303 士 12 Ma（MSWD=1.2）.These results indicate that the Tonggou deposit is a transition between high-sulfidation and porphyry deposits which formed in the Late Carboniferous.It also suggests an increased likelihood for the occurrence of Cu（Au,Mo） in the Bogda Orogenic Belt,especially at locations where the Cu-Zn deposits are thicker;further deep drilling and exploration are encouraged in these areas.
论文目录
文章来源
类型: 期刊论文
作者: Xue-bing Zhang,Chuan Chen,Fang Xia,Ling-ling Gao,Hong-yan Quan
来源: Geoscience Frontiers 2019年06期
年度: 2019
分类: 基础科学,工程科技Ⅰ辑
专业: 地质学,矿业工程
单位: College of Geology and Mining Engineering,Xinjiang University,School of Biological,Earth and Environmental Sciences,UNSW
基金: supported by the Natural Science Foundation of Xinjiang(Grant No.2018D01C042),National Natural Science Foundation of China(Grant No.U1403391),the Application of Geological Mineral Information Database Construction in the three prefectures of south Xinjiang(Grant No.2015BAB05B01-03)
分类号: P618.41;P597.3
页码: 2301-2312
总页数: 12
文件大小: 2367K
下载量: 15
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