Abstract: Ase gold deposit is located in the north of Hengduan Mountains and the east of the upstream of Jinsha River,its tectonic location is distributed in Yidun syncline of Yidun eugeosyncline fold belt of SongpanGanzi geosyncline.Through the analysis of regional geological metallogenic background,geological characteristics of the mining area and deposit,the deposit genesis is discussed,besides that,the prospecting indicators are summarized systematically from the aspects of geochemical,structure,alteration and outcrop.The study results show that:①Ase gold deposit is generally controlled by F2 ductile shear zone,the shear metamorphic metallogenic hydrothermal fluid and the orehosting brittle structures can be produced by the controlling of ductile shear zone,the metallogenesis of the goldbearing formation is produced,so the gold deposits with small scale and gold oreconcentration areas are formed;②the rock activity and permeability are enhanced by ductile shearing,the migration channel of metallogenic material and metallogenic fluid are provided,so as to facilitate the future flows through all kinds of fluids which leaching into the minerals in the shear activity period and then disappear,the metallogenic materials is upper migrated along the high permeability ductile shear zone to the shallow metallogenic favorable position;③the thermodynamic condition of metallogenic elements activation and migration in strata by the emplace ment activities of (insidious) intermediate acidic mafic veins and basicultrabasic rock mass,therefore,the metallogenic activities is produced by the migration of metallogenic fluids to the fracture pressure torsion broken parts;④Ase gold deposit genesis is belongs to the tectonic alteredrock type gold deposit related to the spatial distribution of ductilebrittle shear zone under the action of the hydrothermal fluids formed by regional metamorphism.The above analysis results related to the geological characteristics,genesis and prospecting indicators of Ase gold deposit in Western Sichuan Province can provide some reliable reference for further conducting prospecting and exploration of the deposits in the area or its adjacent areas.

Key words: Alteredrock type gold deposit, Ductile shearing,Shear metamorphic metallogenic hydrothermal fluid, Orehosting structure, Geological characteristics, Deposit genesis, Prospecting indicator