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Fluid–rock interaction in the Qitianling granite and associated tin deposits, South China: Evidence from boron and oxygen isotopes

Fluid–rock interaction in the Qitianling granite and associated tin deposits, South China: Evidence from boron and oxygen isotopes
Fluid–rock interaction in the Qitianling granite and associated tin deposits, South China: Evidence from boron and oxygen isotopes
The behavior of boron and its isotopes in fluid-dominant processes and hydrothermal alteration of granites is examined using fresh and altered granite samples from the Qitianling granite and associated hydrothermal tin deposits in South China. Boron concentrations are highest in the fresh granite (37 ppm) and depleted as a result of two stages of fluid mobility and fluid–rock interaction within the granite. Constraints provided both by ?11B and ?18O data suggest that the first stage was related to exsolution of aqueous fluids from the granite magma at a temperature of > 450 °C. This was followed by further boron depletion in the granite by hydrothermal circulation of meteoric water at lower temperatures (~ 350 °C) and low water/rock ratios. The sensitivity of coupled boron and oxygen isotope systematics to these processes suggests that they can provide valuable constraints on of fluid mobility in granite and associated mineralization.
Boron and oxygen isotopes, Hydrothermal alteration, Qitianling granite, Tin deposit, South China
0169-1368
243-248
Zhao, Kui-Dong
bd5bd864-d7d0-40b4-ae43-37cdc7632a37
Jiang, Shao-Yong
dc929006-69ac-4366-bf2b-dc97527602d3
Nakamura, Eizo
7d990027-a2a8-4e39-9054-4c7a76cb203a
Moriguti, Takuya
78469e57-6a0c-444c-a179-133126483db6
Palmer, Martin R.
d2e60e81-5d6e-4ddb-a243-602537286080
Yang, Shui-Yuan
e596ceb1-f59c-4233-80f4-ed81b1c95ef9
Dai, Bao-Zhang
205dbca4-f5cf-4f6d-bae9-0daf7fd884a3
Jiang, Yao-Hui
d63acdcd-f47d-42c5-a658-c5d597c39816
Zhao, Kui-Dong
bd5bd864-d7d0-40b4-ae43-37cdc7632a37
Jiang, Shao-Yong
dc929006-69ac-4366-bf2b-dc97527602d3
Nakamura, Eizo
7d990027-a2a8-4e39-9054-4c7a76cb203a
Moriguti, Takuya
78469e57-6a0c-444c-a179-133126483db6
Palmer, Martin R.
d2e60e81-5d6e-4ddb-a243-602537286080
Yang, Shui-Yuan
e596ceb1-f59c-4233-80f4-ed81b1c95ef9
Dai, Bao-Zhang
205dbca4-f5cf-4f6d-bae9-0daf7fd884a3
Jiang, Yao-Hui
d63acdcd-f47d-42c5-a658-c5d597c39816

Zhao, Kui-Dong, Jiang, Shao-Yong, Nakamura, Eizo, Moriguti, Takuya, Palmer, Martin R., Yang, Shui-Yuan, Dai, Bao-Zhang and Jiang, Yao-Hui (2011) Fluid–rock interaction in the Qitianling granite and associated tin deposits, South China: Evidence from boron and oxygen isotopes. Ore Geology Reviews, 43 (1), 243-248. (doi:10.1016/j.oregeorev.2011.07.002).

Record type: Article

Abstract

The behavior of boron and its isotopes in fluid-dominant processes and hydrothermal alteration of granites is examined using fresh and altered granite samples from the Qitianling granite and associated hydrothermal tin deposits in South China. Boron concentrations are highest in the fresh granite (37 ppm) and depleted as a result of two stages of fluid mobility and fluid–rock interaction within the granite. Constraints provided both by ?11B and ?18O data suggest that the first stage was related to exsolution of aqueous fluids from the granite magma at a temperature of > 450 °C. This was followed by further boron depletion in the granite by hydrothermal circulation of meteoric water at lower temperatures (~ 350 °C) and low water/rock ratios. The sensitivity of coupled boron and oxygen isotope systematics to these processes suggests that they can provide valuable constraints on of fluid mobility in granite and associated mineralization.

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More information

Published date: December 2011
Keywords: Boron and oxygen isotopes, Hydrothermal alteration, Qitianling granite, Tin deposit, South China
Organisations: Geochemistry

Identifiers

Local EPrints ID: 210409
URI: http://eprints.soton.ac.uk/id/eprint/210409
ISSN: 0169-1368
PURE UUID: 13b86c2d-f8a4-44bf-a6bb-d11e2163aed7

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Date deposited: 08 Feb 2012 11:50
Last modified: 08 Jan 2022 05:41

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Contributors

Author: Kui-Dong Zhao
Author: Shao-Yong Jiang
Author: Eizo Nakamura
Author: Takuya Moriguti
Author: Shui-Yuan Yang
Author: Bao-Zhang Dai
Author: Yao-Hui Jiang

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