黔西南紫木凼金矿床成矿物质来源：S-C-O-Pb-Sr同位素制约

蔡应雄; 杨红梅; 卢山松; 曾飞; 杨文武; 刘重芃; 童喜润; 张利国; 何波

doi:10.3799/dqkx.2021.068

Volume 46 Issue 12

Dec. 2021

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Article Navigation > Earth Science > 2021 > 46(12): 4316-4333

Cai Yingxiong, Yang Hongmei, Lu Shansong, Zeng Fei, Yang Wenwu, Liu Chongpeng, Tong Xirun, Zhang Liguo, He Bo, 2021. ources of Ore-Forming Materials of Zimudang Gold Deposit in Southwest Guizhou, China: Constraints from S-C-O-Pb-Sr Isotope Geochemistry. Earth Science, 46(12): 4316-4333. doi: 10.3799/dqkx.2021.068

Citation:

Cai Yingxiong, Yang Hongmei, Lu Shansong, Zeng Fei, Yang Wenwu, Liu Chongpeng, Tong Xirun, Zhang Liguo, He Bo, 2021. ources of Ore-Forming Materials of Zimudang Gold Deposit in Southwest Guizhou, China: Constraints from S-C-O-Pb-Sr Isotope Geochemistry. Earth Science, 46(12): 4316-4333. doi: 10.3799/dqkx.2021.068

Citation:

Cai Yingxiong, Yang Hongmei, Lu Shansong, Zeng Fei, Yang Wenwu, Liu Chongpeng, Tong Xirun, Zhang Liguo, He Bo, 2021. ources of Ore-Forming Materials of Zimudang Gold Deposit in Southwest Guizhou, China: Constraints from S-C-O-Pb-Sr Isotope Geochemistry. Earth Science, 46(12): 4316-4333. doi: 10.3799/dqkx.2021.068

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ources of Ore-Forming Materials of Zimudang Gold Deposit in Southwest Guizhou, China: Constraints from S-C-O-Pb-Sr Isotope Geochemistry

doi: 10.3799/dqkx.2021.068

Cai Yingxiong^{1, 2
,
,},
Yang Hongmei^{1, 2},
Lu Shansong^{1, 2},
Zeng Fei³,
Yang Wenwu^{1, 2},
Liu Chongpeng^{1, 2},
Tong Xirun^{1, 2},
Zhang Liguo^{1, 2},
He Bo^{1, 2}

1.
Wuhan Center of China Geological Survey, Central South China Innovation Center for Geosciences, Wuhan 430205, China
2.
Research Center of Petrogenesis and Mineralization of Granitoid Rock, China Geological Survey, Wuhan 430205, China
3.
Guizhou Jinxing Gold Mining Industry Co., Ltd., Xingren 562300, China

Received Date: 2021-03-08
Publish Date: 2021-12-15

Abstract

Abstract

The Zimudang gold deposit, part of the Southwest Guizhou Au metallogenic province, is an important large-size Carlin-type Au deposit. However, the sources of ore-forming materials of this deposit are still unclear. In this study, it systematically evaluated the S, C, O, Pb, and Sr isotopic compositions for various orebodies and host rocks of this deposit. δ³⁴S values of sulfides from orebodies range from -13.49‰ to 17.91‰, with peaks ranging from -0.99‰ to 3.58‰, while those of host rocks range from -26.23‰ to -19.63‰, which indicates that the sulfur in the ore-forming period mainly derived from magma and partially from pre-mineralization pyrites in the host-strata. δ¹³C and δ¹⁸O values of hydrothermal calcites range from -9.10‰ to 0.59‰ and 15.65‰ to 23.82‰, respectively, which are different from those of host rocks and regional strata, suggesting that the C and O in ore-forming fluids were partially from carbonate rocks (via dissolution) and might be partially from magma. Pb isotopic ratios of ²⁰⁶Pb/²⁰⁴Pb, ²⁰⁷Pb/²⁰⁴Pb and²⁰⁸Pb/²⁰⁴Pb for sulfide minerals from orebodies are 18.064 to 18.973, 15.585 to 15.670 and 38.219 to 39.054, respectively, and those for host rocks are 18.136 to 18.650, 15.574 to 15.656 and 38.423 to 38.812, respectively. These Pb isotopic ratios show that the Pb in orebodies was not from a single source, but might be a combination source of host-strata and magma. Initial ⁸⁷Sr/⁸⁶Sr of quartzes and carbonates from orebodies and the host rocks are in ranges of 0.707 26-0.708 11 and 0.707 28-0.707 31, respectively, which illustrate that the Sr in ore-forming fluids was mainly from host-strata. These S, C, O, Pb, and Sr isotopic studies for the Zimudang Au deposit demonstrate that the ore-forming materials have a mantle-crust mixed origin-a main source of deep concealed mantle magma with a minor input from the Permian-Triassic host-strata.
- Zimudang gold deposit,
- Carlin-type Au deposit,
- Southwest Guizhou,
- isotope geochemistry,
- sources of ore-forming material,
- geochemistry

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ources of Ore-Forming Materials of Zimudang Gold Deposit in Southwest Guizhou, China: Constraints from S-C-O-Pb-Sr Isotope Geochemistry

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