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Differentiation and accumulation of fluids in A-type granites: Evidence from accessory mineral study

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Chinese Science Bulletin

Abstract

The Laoshan A-type granite is a highly evolved granite body. The study on accessory minerals indicates that there exist differentiation and accumulation of fluids during the late stage of evolution of the granite. The released fluids are rich in rare-earth elements (REE), high-fieldstrength elements (HFSE, such as Nb, Ta, Zr, Hf, Th, U, and Y) and volatiles (F, P, CO2, etc.). Owing to the presence of fluid, accessory mineral assemblages have changed during the evolution of A-type granite, and are especially characterized by large amounts of independent REE-Nb-Y-Th minerals present in the late facies. Late-accumulation of fluids may be of the general feature of A-type granites, at least of highly evolved ones.

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Authors and Affiliations

  1. Department of Earth Sciences and State Key Laboratory for Mineral Deposits Research, Nanjing University, 210093, Nanjing, China

    Rucheng Wang, Jianjun Lu & Shijin Xu

  2. Department of Ocean Geology, Qingdao Ocean University, 266003, Qingdao, China

    Guangtao Zhao & Dezi Wang

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  1. Rucheng Wang
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  2. Guangtao Zhao
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  3. Dezi Wang
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  4. Jianjun Lu
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  5. Shijin Xu
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Correspondence to Rucheng Wang.

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Wang, R., Zhao, G., Wang, D. et al. Differentiation and accumulation of fluids in A-type granites: Evidence from accessory mineral study. Chin.Sci.Bull. 45, 1609–1613 (2000). https://doi.org/10.1007/BF02886223

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  • DOI: https://doi.org/10.1007/BF02886223

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