Abstract
The different metamorphic mineral assemblages can reflect the difference of metamorphic temperature and pressure and determine the different metamorphic facies. The identification and determination of the occurrence of characteristic metamorphic minerals and the symbiotic association of typical metamorphic minerals can determine the metamorphic phase of graphite and its surrounding rock, and further infer the formation conditions of graphite. In this paper, the mineral assemblage relationship of a graphite deposit and its surrounding rock in the south of Hebei province is studied by means of microscopic observation and Electron Probe Micro Analysis (EPMA), and the metamorphic facies of the graphite deposit and the temperature and pressure conditions of the deposit are deduced. The study shows that the metamorphic facies of the graphite deposit is low amphibolite facies and the ore-forming conditions are medium temperature and medium pressure.
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