Discussion on the Relationship Between the Metamorphism Degree of Coal Seam and the Enrichment of Germanium

doi:10.3969/j.issn.1009-0479.2020.03.004

Abstract

Abstract: The enrichment of germanium in coal is closely related to hydrothermal activity , but hydrothermal activily leads to coal bed metamorphism. In order to analyze the relationship between coal bed metamorphism and germanium enrichment，germanium rich coal was collected from the Baoshan Mining Area,Yunnan Province，and its vitrinite reflectance is 0.464%%~1.737% , and the germanium grade is 11~55 ug/g，which shows an obvious negative correlation，indicating that the enrichment of germanium is controlled by hydrothermal activily in both directions，and the hydrothermal fluid can not only lead to the enrichment of germanium but also cause the loss of germanium through the hydrothermal metamorphism of the coal seam，which indicates that the low-temperature ore bearing hydrothermal fluid is the source of germanium in coal and also the favorable condition for the enrichment of germanium. Through the analysis of the relationship belween the germanium bearing coal in the Baoshan mining area and the associated germanium in Huize Lead-zinc mine，it is concluded that the germanium bearing coal is mainly distributed in the transition zone where the hydrothermal metamorphism of the coal seam is weakening.

Key words: germanium, metamorphsm, coal seam

CLC Number:

P618.11

LIU Wei, YIN Qiong, Ll Wanhong, Wu Wei, FANG Na. Discussion on the Relationship Between the Metamorphism Degree of Coal Seam and the Enrichment of Germanium[J]. Journal of Kunming Metallurgy College, 2020, 36(3): 20-26.

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