Genesis of the Baiyun Gold Deposit in Northeast Hubei Province, China: Insights from In Situ Trace Elements and S-Fe Isotopes of Sulfide

Author:

Song Weifang12,Liu Jianzhong345,Zou Yuanbing12,Liu Xingping12,Long Taocheng12,Zhu Jiandong12,Fu Shengbo12,Chen Song12,Xiong Yangfu12,Zhou Runjie26,You Jingjing12,Zhou Xinqi12,Yang Zaixi12,Fang Jie12

Affiliation:

1. NO. Six Geological Team of Hubei Geological Bureau, Xiaogan 432000, China

2. Hubei Key Laboratory of Resources and Eco-Environment Geology, Xiaogan 432000, China

3. Guizhou Bureau of Geology and Mineral Exploration & Development, Guiyang 550004, China

4. Innovation Center Ore Resources Exploration Technology in the Region of Bedrock, Ministry of Natural Resources of the People’s Republic of China, Guiyang 550018, China

5. College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China

6. Hubei Geological Survey, Wuhan 430034, China

Abstract

The Baiyun gold deposit is a medium-sized deposit in northeastern Hubei around the southern margin of the Tongbai-Dabie metallogenic belt. However, its genesis has not been determined. The metallogenic process of the Baiyun gold deposit can be divided into three stages: quartz + feldspar, quartz + native gold + electrum + polymetallic sulfides, and quartz + pyrite + calcite + iron dolomite + illite. In this study, LA-ICP-MS was used for in situ trace element and isotope analyses in the main and late ore stage hydrothermal sulfides to evaluate the genesis and evolution of ore-forming fluids. Gold is positively correlated with Ag, Cu, Pb, Zn, and Te and the Co/Ni ratio is greater than 1. The S isotope values of Py1 and Py2 are −0.23–3.04‰ and 1.27–6.09‰, respectively. As mineralization progressed, S isotope values increased. In situ S isotope values of the two types of galena symbiotic with pyrite in the main metallogenic stage are 2.97–3.47‰. In situ Fe isotopic values of pyrite are −0.05–0.82‰; values in the two stages are similar without significant fractionation. We inferred that the Baiyun gold deposit formed via magmatic mineralization related to the subduction of the Pacific Plate during the Yanshanian.

Funder

Natural Science Foundation project of Hubei Province

Science and technology project of Hubei Geological Bureau

Talent Team Program of Science and Technology Foundation of Guizhou Province

Publisher

MDPI AG

Reference124 articles.

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