Anatomy and genesis of the world's largest carbonate-hosted Zn-Pb deposit:New insights from ore characteristics,Zn-Pb-C-O isotopes,and trace element constraints of the Huoshaoyun deposit,Karakorum Range,Xinjiang

扫码查看

原文链接

万方数据

外文摘要：The Huoshaoyun deposit in the Karakorum area of NW China is the world's largest zinc-lead carbonate ore deposit.Here we investigate the genesis of the mineralization based on multiproxy investigations.The deposit contains zinc-lead carbonate and sulfide minerals,with smithsonite(Smt),cerussite(Cer),and sulfides accounting for 85％,10％,and 5％of the total lead and zinc resources,respectively.Three ore-forming stages,involving Smt,Cer,and sulfides ores were summarized.The Smt mineralization is characterized by veined,massive,and stratified Smt forming horizontal sedimentary layered ore and ver-tical feeder veins similar to the SEDEX-type deposits.The sulfide and Cer veins display typical hydrother-mal characteristics and are superimposed on the massive Smt ores.The Smt ores show high Li,Be,Cr,Y,Ba,Nd,Yb,and Zr contents,whereas the Cer veins have extremely high Sr contents(up to 3814-9174 ppm)and low Zr contents(less than 0.01 ppm).Galena and sphalerite show higher Cd concentra-tions compared to Smt and Cer ores.The Smt ores differ with different spatial locations,with Smt ores formed at the vent have δ66Zn values of+0.15‰ to+0.21‰,the massive Smt formed close to the vent show a value of+0.13‰,and those formed away from the vent show a value of 0.05‰,all values being close to 0.The sulfides have δ66Zn values of-0.09‰ to+0.04‰.The C-O isotopes of Smt ores are similar to both altered and unaltered host limestone,suggesting that the limestone was a potential source for carbon and oxygen.Quartz with veined Smt shows magmatic signatures with δ18OVSMOW of+1.14‰ to+2.23‰,high Pb(115-401 ppm)and Zn concentrations(390-997 ppm),whereas quartz associated with sulfide has meteoric fluid signa-ture with the lowest δ18OVSMOW(-14‰ to-10.7‰),low Pb(11.6-49.0 ppm)and Zn(18.1-72.8 ppm)concentrations.The temperature of equilibration computed based on oxygen isotope fractionation between Smt and coeval quartz indicate a dual source with that of quartz derived from an aqueous fluid,whereas the source for Smt might involve CO2 or HCO3-.We trace multiple metallogenic stages for this deposit including exhalation,hydrothermal deposition,and fault-controlled sulfide vein formation.The largest orebody(Ⅲ-1)preserves a 16 Mt reserve of Zn and was formed by crust-mantle interaction at ca.195 Ma in the early development of the Linjitang post-arc rift system.Fluid convection,zinc enrichment driven by granitic magma,volcanic activity,and karst alteration induced by acid rain in a lagoonal environment promoted ore enrichment.

外文关键词：

Pb-Zn carbonate oresGeochemistryZn-Pb-C-O isotopesGenesisMetallogeny

作者：

Qiang Ke、Tao Hong、M.Santosh、Hao Li、Guoliang Zhang、Hang Li、Jianling Wan、Tingbin Fan、Lianhui Dong、Jing Ma、Xing-Wang Xu

展开 >

作者单位：

State Key Laboratory of Lithospheric and Environmental Coevolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China

Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China

Space Engineering University,Beijing 101416,China

Guangdong Provincial Key Lab of Geodynamics and Geohazards,School of Earth Sciences and Engineering,Sun Yat-sen University,Guangzhou 510275,China

Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China

School of Earth Science and Resources,China University of Geoscience(Beijing),Beijing 100083,China

Department of Earth Science,University of Adelaide,Adelaide,SA 5005,Australia

Xinjiang Bureau of Geology and Mineral Resources,Urumqi 830000,Xinjiang,China

展开 >

出版年：

2024

DOI：

10.1016/j.gsf.2024.101885

地学前缘(英文版)

中国地质大学（北京）北京大学

地学前缘(英文版)

CSTPCD

影响因子：0.576

ISSN：1674-9871

年,卷(期)：2024.15(6)