Abstract:The explosive-collapsed breccia gold ore deposit seems to be a major and representative one among the Qiyugou type gold deposists. The ore field is located at the Southern margin of the North China platform,Gold minerali-zation was genetically related to the evolution of the Middle-Late Yanshaniancalc-alkaline magma. The whole ore-forming process underwent vanward,major and late alteration-mineralization periods,with native gold being thepredominant gold ore mineral. This paper deals mainly with typomorphic characteristics of native gold.2800 grains of native gold have been studied by the authors by means ofnaked eye, microscopy and electron microprobe analysis.In the light of thetypolnorphic characteristics so far established,it is presumed that the brecciatype gold deposits under exploration may be considerable in scale,and that,besides the auriferous J_4 and J_2 breccia orebodies,the other breccia bodies inthe Qiyugou ore field ought to have good prospects.The existence of gold crys-tals{111},{111} {110},{100}may indicate rich gold mineralization areas.The denudation depth of the orebod ies(auriferous breccia bodies)may becstimated with the help of the regular zoning pattern of the gold crystalforms in space. This special zoning may also be used to evaluate ore potentialand prospects of all other breccia bodies on the outskirts. Moreover,the rela-tively high content of bismuth in native gold may be taken as an indicatorfor ore prospecting and evaluation.