Abstract:

Wulong quartz-vein-type gold deposit is located in Dandong City, Liaoning Province, China.It is a magmatic-hydrothermal deposit enclosed in mylonite or ultramylonite.The deposit is controlled by Jixingou Fault (F₂) and No.100 Fault (F₃).In this paper the authors studied minutely the occurrences, shapes, compositions and their typomorphic ratios  (Fe/(S+As)，Co/Ni，S/Se）, sulfur isotopes, thermoelectric coefficients of the pyrites in Wulong quartz-vein-type gold deposit, analyzed the pyrite typomorphic coefficient characteristics, sumed up the pyrite genesis and prospecting typmorphic characteristics, took out the major genesis and prospecting information of the pyrite, prognosticated firstly mineralization perspective of the depth in the ore area and the quartz vein in outer target area by using the triangle illustration of the pyrite composition characteristic，which not only provided reliable mineralogy basis for the genesis of Wulong gold deposit, but also given efficient evaluation for prospecting assessment of the depth in the ore area and the quartz vein in outer target area.The authors consider that Wulong gold deposit is mesogene and hypergene magmatic-hydrothemal deposit. It is very good for prospecting assessment of the depth in Wulong ore area and No.220 vein, No.38 vein, No.2 vein in outer target area.

Key words: typomorphic characteristic, pyrite, quartz-vein-type gold deposit, Wulong ore area, Liaoning