The Lower Cambrian black rock sequence widely distributed in Yangtze platform of South China is rich in Ni, Mo, V, Cu, U, Ba, REE and platinum group elements (PGE). The genesis of these ore species has aroused much interest due to their specific age and polymetallic combination. This paper deals with the Huangjiawa deposit in Zunyi. Methods used in the laboratory study included petrochemistry and elemental geochemistry. Geochemical characteristics of trace elements show that there exists obvious enrichment of such chalcophile elements as Ni, Mo, Cd, V, Cu and Zn in the Ni-Mo polymetallic deposits, while the high field intensity elements like Nb, Th, Hf, Zr and Ti are evidently deficient. The U/Th ratio is higher than