The present paper deals with the 0--A1 center and E center in quartz, which can be used to deduce indirectly the major ore-forming stage according to the variation in the EPR spectra of quartz with the formation temperature of quartz veins. Calculated result using the data of EPR spectra of quartz indicates that the intensities of O--Al center show a positive correlation with the corresponding Gold content of quartz veins with a correlation coefficient γ=0.61 (a=0.O1). The intensities of O--Al center of the quartz veins from 4 drill holes have similar variation patterns to those of corresponding gold contents. The positive correlation of the O--Al center of quartz with the gold content can be regarded as an indicator of ore-potential in ore prognosis and prospecting.