湖南芙蓉锡矿田流体包裹体的He同位素组成及成矿流体来源示踪

李兆丽; 胡瑞忠; 彭建堂; 毕献武; 李晓敏

Volume 31 Issue 1

Jan. 2006

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Article Navigation > Earth Science > 2006 > 31(1): 129-135

LI Zhao-li, HU Rui-zhong, PENG Jian-tang, BI Xian-wu, LI Xiao-min, 2006. Helium Isotope Composition of Fluid Inclusions and the Origin of Ore-Forming Fluids of Furong Tin Orefield in Hunan Province, China. Earth Science, 31(1): 129-135.

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Helium Isotope Composition of Fluid Inclusions and the Origin of Ore-Forming Fluids of Furong Tin Orefield in Hunan Province, China

1.
Key Laboratory of Ore De posit Greochernislry, Institute of Grvochemnistry, Chinese Acdemy of Sciences, Guiyang 550002, China
2.
Grudwate School, Chinese Academy of Sciences, Beijing 100039, China

Received Date: 2005-07-22
Publish Date: 2006-01-25

Abstract

Abstract

The Furong tin orefield, located in southern Hunan, China, is a newly-discovered super-large tin orefield. In contrast to most other tin deposits associated with S-type granites, the Furong tin deposit is spatially and temporally associated with the Qitianling A-type granite. The ³He/⁴He ratios of fluid inclusions in sulfides from this orefield range from 0. 14 to 2. 95 Ra, which are lower than that of the mantle, and higher than that of the crust, indicating that the helium in ore-forming fluids from this orefield is a mixture of two end-member components, mantle-source He and crust-source He. This conclusion is in accordance with the S isotope, Sr isotope and other results, suggesting that there must be some mantle-source substance in mineralization of this orefield. The Qitianling granite belongs to A-type granite which formed in a post-orogenic extensional settings. The Furong tin orefield is located at the contact zone (outer or inner) or within of Qitianling granite, and its main tin-mineralization time is consistent with the intrusion time of Qitianling granite. The relationship reflects that their forming settings of geodynamics might both be related to the Mesozoic lithospheric extension in South China.
- Furong tin orefield,
- ore-forming fluid,
- He isotope

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References(44)

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Helium Isotope Composition of Fluid Inclusions and the Origin of Ore-Forming Fluids of Furong Tin Orefield in Hunan Province, China

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