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The mineralogical features of the oxidation-reduction of graphite deposit in pingdu, Shandong province were studied by field search, polarization microscope, X-ray diffraction (XRD) and SEM.The results show that, the major rocks of the reduction graphite zone are graphite-quartz anorthosite, gabbro.The major rocks of the oxidation graphite zone are marble with graphite, biotite granite, monzogranite.