Significance of inclusions and fluid evolution of the porphyry-skarn copper-molybdenum deposit in Tongshankou, Daye, Hubei

He Di; Tan Jun; Liu Xiaoyang; Zhang Min; Zhao Biao; Chen Yang; Zhao Yanyan

doi:10.19509/j.cnki.dzkq.2020.0508

Volume 39 Issue 5

Sep. 2020

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He Di, Tan Jun, Liu Xiaoyang, Zhang Min, Zhao Biao, Chen Yang, Zhao Yanyan. Significance of inclusions and fluid evolution of the porphyry-skarn copper-molybdenum deposit in Tongshankou, Daye, Hubei[J]. Bulletin of Geological Science and Technology, 2020, 39(5): 97-108. doi: 10.19509/j.cnki.dzkq.2020.0508

Citation:

He Di, Tan Jun, Liu Xiaoyang, Zhang Min, Zhao Biao, Chen Yang, Zhao Yanyan. Significance of inclusions and fluid evolution of the porphyry-skarn copper-molybdenum deposit in Tongshankou, Daye, Hubei[J]. Bulletin of Geological Science and Technology, 2020, 39(5): 97-108. doi: 10.19509/j.cnki.dzkq.2020.0508

Citation:

He Di, Tan Jun, Liu Xiaoyang, Zhang Min, Zhao Biao, Chen Yang, Zhao Yanyan. Significance of inclusions and fluid evolution of the porphyry-skarn copper-molybdenum deposit in Tongshankou, Daye, Hubei[J]. Bulletin of Geological Science and Technology, 2020, 39(5): 97-108. doi: 10.19509/j.cnki.dzkq.2020.0508

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Significance of inclusions and fluid evolution of the porphyry-skarn copper-molybdenum deposit in Tongshankou, Daye, Hubei

doi: 10.19509/j.cnki.dzkq.2020.0508

Received Date: 09 Sep 2019

Abstract

Abstract

Magma-skarn is an important genetic type among the multi-genesis of skarns. Based on petrographic observation and thermal microscopy temperature measurement of inclusions, combined with laser Raman spectroscopy, characteristics of ore-forming fluids at the Tongshankou porphyry-skarn copper-molybdenum deposit has been studied. This study aims to provide evidence for the formation of the magma-genetic skarn and further to unveil the melt-flow conversion processes and metal enrichment mechanism of ore-forming fluids. A vast amount of crystalline and amorphous melt inclusions and melt-fluid inclusions the melt inclusions have been found in the skarn minerals, e.g. garnet in the early stage, indicating that the magma droplets could have been trapped by the early skarn minerals. These inclusions could provide essential evidence for the magmatic genesis of the early skarns. With the comparison of different types of inclusions in the skarn minerals at each stage, it is believed that the skarn is dominated by magmatic genesis in the early stage, and the hydrothermal genesis in the late stage. Moreover, the processes of melt-flow conversion mainly occur in the prograde skarn stage. Ore minerals, e.g. chalcopyrite, found in the melt inclusions through the laser Raman analysis indicate that the skarn magma is rich in ore-forming materials at the Tongshankou deposit, which could aid in the deep prospecting and exploration in this area.

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Significance of inclusions and fluid evolution of the porphyry-skarn copper-molybdenum deposit in Tongshankou, Daye, Hubei

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Significance of inclusions and fluid evolution of the porphyry-skarn copper-molybdenum deposit in Tongshankou, Daye, Hubei

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