Abstract: The precious metal mineral of Wulonggou gold ore in Qinghai is mainly natural gold and the gold grade is 2.43 g/t.Associated silver grade is also relatively lower.It is microfine-superfine disseminated gold deposit，containing carbon and arsenic.It is difficult to mineral processing and smelting.X-ray fluorimetric analysis，chemical analysis，mineralogical microscope，X-ray diffraction analysis，MLA mineral automatic quantitative system was used to research mineral chemical contents，structure，mineral components and stockpile status of the ore.The result shows that:①Valuable elements is gold and silver，harmful substances carbon and arsenic contents is high.Gold containing minerals are include natural gold，aurostibite，maldonite and petziteetc.②Gold mainly in microscopy，super microscopy dispersed state included in arsenopyrite or loelling，some contained in gangue minerals of sericite，chlorite and quartz，small amount contained in pyrite and pyrrhotite，most particle size is less than 1 μm.③Mainly gold dissemination size is microfine，98.45% gold size was less than 0.04 mm，pyrite，toxic sand and pyrrhotite are of medium and fine，suitable for flotation.④Gold recovery has closed relationship with the sulfur arsenic recovery，arsenopyrite recycle should especially pay more attention to.The results provide technical basis for rational exploitation and utilization of the ore.

Key words: Gold ore, Occurrence state, Embedded characteristics