This paper reports some preliminary results obtained from field petrographic work, laser Raman microspectroscopy and electron microprobe analysis carried out on the Au-bearing Qiyugou breccia pipes. The adularia-calcite assemblage was recently discovered in the breccia gold deposit. Two stages of gold mineralization in the breccia pipes, i.e., pervasive and veined, were distinguished. The early pervasive alteration of actionlite, green biotite, epidote, chlorite and minor sericite replaced breccias and rock flour, followed by later adularia and calcite alteration filling the open space. Vein ores associated with quartz, sericite, and minor calcite alteration occur in NE-trending faults that cut pervasive ores. These results show that adularia-calcite alteration is associated with gold mineralization. The discovery of the adularia-calcite assemblage in the area suggests that the Qiyugou pipes are genetically of low-sulfidation epithermal type.