Rb-Sr isochron age of the Heilongtan Au-deposit in Suizhou, Hubei Province, and its geological significance

PENG Sanguo; HU Junliang; LIU Jinsong; ZHU Jiang; GONG Yinjie

2017 Vol. 36, No. 5

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PENG Sanguo, HU Junliang, LIU Jinsong, ZHU Jiang, GONG Yinjie. Rb-Sr isochron age of the Heilongtan Au-deposit in Suizhou, Hubei Province, and its geological significance[J]. Geological Bulletin of China, 2017, 36(5): 867-874.

Citation:

PENG Sanguo, HU Junliang, LIU Jinsong, ZHU Jiang, GONG Yinjie. Rb-Sr isochron age of the Heilongtan Au-deposit in Suizhou, Hubei Province, and its geological significance[J]. Geological Bulletin of China, 2017, 36(5): 867-874.

Rb-Sr isochron age of the Heilongtan Au-deposit in Suizhou, Hubei Province, and its geological significance

1.
Wuhan Center of Geological Survey, CGS, Wuhan 430205, Hubei, China
2.
Research Center for Petrogenesis and Mineralization of Granitoid Rocks, CGS, Wuhan 430205, Hubei, China

Received Date: 09 October 2016

Revised Date: 28 March 2017

Publish Date: 25 May 2017

Abstract

Abstract

The age of the Heilongtan gold deposit in northern Hubei Province was determined by the Rb-Sr isochron method.Six samples of quartz-hosted fluid inclusions yielded a Rb-Sr isochron age of 132.6±2.7Ma, suggesting that the Heilongtan gold deposit was formed in the Late Cretaceous.The (⁸⁷Sr/⁸⁶Sr) _i initial ratio of the isochron is 0.710798, which is lower than that of the terrige-nous silicates (0.720) but higher than that of the mantle (0.707), implying that ore-forming materials were derived from a mixture of crust and mantle components.Combined with the reported S and Pb isotopes, the authors hold that the ore-forming process of the Heilongtan gold deposit was probably related to the Late Mesozoic magmatism in an extensional setting.The magmatism might have provided sufficient heat energy, fluid, sulfur and gold for the mineralization of the Heilongtan gold deposit.
- quartz /
- Rb-Sr isochron age /
- metallogenic epoch /
- Heilongtan gold deposit /
- geochemistry

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References

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