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Geoscience ›› 2020, Vol. 34 ›› Issue (03): 579-587.DOI: 10.19657/j.geoscience.1000-8527.2019.015

• Ore Deposits • Previous Articles     Next Articles

Sulfur and Lead Isotopic Compositions of Boka Copper Deposit, Central Yunnan, China, and Its Geological Significance

FEI Lidong1,2(), XIAO Xiaoniu1,3(), XIAO E1,2, LIU Jun1, BAI Tao1,2   

  1. 1. East China Mineral Exploration and Development Bureau for Non-ferrous, Nanjing, Jiangsu 210007, China
    2. State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
    3. Fujian Jindong Mining Company Limited, Sanming, Fujian 365101, China
  • Received:2018-03-22 Revised:2019-12-10 Online:2020-07-04 Published:2020-07-05
  • Contact: XIAO Xiaoniu

Abstract:

Boka copper deposit in central Yunnan Province is a representative of the Dongchuan copper depo-sits, but previous studies have different views on its ore-forming material source and the metallogenic origin. In this study, we analyzed the sulfur and lead isotope compositions in typical metal sulfides to reveal the ore-forming material source of this deposit. Metal sulfides from the Renzhanshi copper mine (δ34S=1.6‰ to 10.7‰) indicate that the sulfur was mainly igneous-sourced (volcanic eruptions) with sedimentary input. Lead isotope compositions of metal sulfides from the Renzhanshi, Tianshengtang, Zhuqing’aozi and Baishiyan copper mines indicate that the lead may have had a mantle-crust mixed source. The sulfur and lead isotopic characteristics of metal sulfides from this and previous studies suggest that the ore-forming materials were mainly mantle-sourced with crustal contamination.

Key words: Boka copper deposit, central Yunnan, sulfur isotope, lead isotope, ore-forming material source

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