| Guided as the theory of metallogenic system, mineralogy, structural geology, geochemistry, metallogeny, metallogenic prognosis, and combined with the comprehensive analysis and summary of geology, geophysical, geochemical exploration, remote sensing, et al, the author chosen Zhacun Au deposit area as a study object, based on the results of previous work, dig out the innovation breakthrough of an important theoretical significance and practical value, researched on the relationship Zhacun Au deposit area mineralization with alk-rich porphyries, and the possible to existence concealed porphyry, identified on the ore body characteristics, ore type, ore genesis and metallogenic system, summarized on mineralization regularities, ore-controlling factors and prospecting criteria, though which executed metallogenic prognosis as Zhacun Au deposit area, and guided as the prospecting work of outside, deep and region.Trough the research results and knowledge of previous, the paper summarized and studied the regional geological background, mining geology, gold-bearing fracture zone characteristics of Zhacun Au deposit area, and gave a summary and research on the geological feature, ore body feature, ore mineral composition, structure, construction and type of Zhacun Au deposit.Researched on the geochemical characteristics of deposit, mineralization in this area had multi-source feature, gold mineralization was closely associated with pyrite in the sulfur isotopic composition, and quartz inclusions in the hydrogen, oxygen isotope composition from the deposit. The study showed that mineral had the mixture source feature with mantle and crust, and thought that mineral sources have direct relation with Himalayan magma (porphyry) activities.It was the first time to propose that the lotus mountain quartz monzonite-porhyry magmatism have direct relation with mineralization in this area, which is an important ore source and fluid origin, is also main heat resource that drive to the ore-forming fluid. Combined with regional geological background, the analysis of relationship between mineralization and alkaline porphyry, ore-forming elements characteristics, the paper got that Zhacun Au deposit area belong to hydrothermal (water) metallogenic system type, and built the metallogenic system model of Zhacun Au deposit area.It was the first time to comparative analysis the ore genesis of Zhacun Au deposit and carlin type gold deposit. Then, through the analysis of ore-forming conditions, gold mineralization process and ore genesis mechanism, the paper considered that the ore genesis type was the middle-low temperature mixture hydrothermal type gold deposit of the far-reaching source migration of structural fracture zone ore-controlling, isn't was carlin type gold deposit.By the analysis of1:25million magnetic anomaly and remote sensing interpretation, the paper first proposed that the deposit area present concealed porphyry, and present concealed structure as good channel, which provided a lot of new ideas and directions to look for gold mineralization favorable location.On the study of geological characteristics, metallogenic system, ore genesis, metallogenic regularities, prospecting criteria and geophysical, geochemical, remote sensing characteristics, the paper delineated6prospecting target, including2prospecting target of A-type,1prospecting target of B-type and3prospecting target of C-type. The author first proposed that safflower garden and Zhacun-Xishu street-Lotus mountain is looking for gold favorable location. It is noteworthy that Zhacun-Xishu street-Lotus mountain have exposed alkaline porphyry body and buried porphyry, which can provide the driving energy of mineralization, and have buried fault to use a good channel to ore-bearing hydrothermal solution. So, the band expected to look for new lots of gold enrichment by further work.
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