Mineralation Of Ductile Shear Belt Gold Deposit Of Maerkakuli In Habahe, Xinjiang

Maerkakuli ductile shear zone is the main part of south edge of Aletai, at thesame time it is dominant metallogenic belt of Au. The classic gold deposits includeSaidu gold deposit and Zhelande gold deposit. Based on the former information andthe new result of1:50000regional survey, the distribution and deformation feature ofMaerkakuli ductile shear zone are found out in different scales. According tosystematic research of the classic gold deposits geology, structural geology and thegeochemical characteristics (stable isotopic ratio of H、O、S、Pb、REE and fluidinclusion), it discussed the ore-controlling mechanism, the source of ore-formingmaterials and the feature of ore-forming fluid. Furthe more, summarized themetallogenic model of gold deposit in Maerkakuli ductile shear zone.It ascertains the distribution and scale of Maerkakuli ductile shear zone firstly,and summarizes the structure deformation characteristics systematically. Thedeformation inside the belt is characterized by strain concentration alternating withweak strain belt and strain transformation, The deformation fabrics are various, suchas S-C、the tight homoclincal folding etc. Based on its deformation fabrics, kinematicsand dynamic feature, the shear deformation can be divided into three phases: the sheardeformation phase in early stage, the brittle-ductile shear deformation phase in mid-term brittle deformation in later period.Maerkakuli ductile shear zone is the first class ore-controlling structure belt inthis area. The gold-copper deposits of Saidu and Zhelande are rather similar, they areall the results of the evolution of Maerkakuli ductile shear zone. The brittle-ductiledeformation transition controls the distribution of gold deposits strictly. Toabtainfollowing rules:(1) the brittle-ductile deformation transition can divided intostrong-weak alternating type and original place transformation type;(2) the feature ofstrong-weak strain alternating and deformation transition in crosswise, longitudinaland vertical depth controls the distribution of deposits, it brings up the constructionmodel of the brittle-ductile deformation transition space and gold deposit distribution;(3) the brittle-ductile deformation transition belts are the collection belt of golddeposits;(4) gold mineralization lags ductile deformation, the main mineralizationperiod is in brittle-ductile deformation stage.Suming up the research and comparison of H, O, S, Pb stable isotopic ratio andthe REE in Saidu gold deposit and Zhelande gold deposit, it manifests that themetallogenenic fluid of gold deposits is mainly metamorphic fluid, and sneaked intoprecipitate water later. Some materials may come from deep crust or mantle. Sometallogenic materials have the multi-source feature.At last， it summazried themetallogenic model of gold deposit. In the Maerkakuli ductile shear belt.