Advances in Research of Mineral Chemistry of Magmatic and Hydrothermal Biotites |
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Authors: | TANG Pan CHEN Yuchuan TANG Juxing WANG Ying ZHENG Wenbao LENG Qiufeng LIN Bin and WU Chunneng |
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Institution: | Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China;Institute of Mineral Resources, Chinese Academy of Geological Sciences (CAGS), Beijing 100037, China;Institute of Mineral Resources, Chinese Academy of Geological Sciences (CAGS), Beijing 100037, China;China University of Geosciences, Beijing 100083, China;Guangxi Nonferrous Metal Group Resource Exploration Co., Ltd., Nanning 530023, China;College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China |
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Abstract: | Biotite is an important hydrated ferromagnesian silicate mineral in igneous rocks and porphyry deposits. The determination of chemical compositions of biotite plays an important role in both igneous petrology and ore forming processes. This paper summarizes research results of magmatic and hydrothermal biotites exemplified by the Lakange porphyry Cu–Mo deposit and the Qulong porphyry Cu deposit in the Gangdese porphyry–skarn metallogenic belt, Tibet. Biotite mineral chemistry can provide critical insights into classification, geothermometer, geothermobarometry, oxygen fugacity, petrogenesis and tectonic setting, evaluating magmatic‐hydrothermal process by halogen and halogen fugacity ratios, and distinguishing between barren and mineralized rocks. Biotite provides the latest mineralogical evidence on metallogenic prognosis and prospecting evaluation for porphyry Cu polymetallic deposits or magmatic hydrothermal deposits. |
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Keywords: | magmatic biotites hydrothermal biotites mineral chemistry porphyry deposit Lakange Qulong Gangdese |
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