Study On Ore-controlling Regularities And Prospecting Directions On The Axile Gold Depositin XinJiang

With the improved exploration, there are fewer outcrop of ore bodies. It is very importanthow to utilize the scientific geological theories and efficient exploratory methods to find theblind orebodies.The Axile gold deposit, located in Habahe city, occurs in the northwest area of the EerqisiTectonic Belt which is the most important gold mineralization zone. Tectonicly, the deposit issituated in the Ashele Pull-apart Basin of the Kelan Rift zone. The deposit has been consideredas small and ruleless by the geological workers since1956. In this paper, the ore-forming typeand the gold metallogenetic regular which are important works for the actual surveing isrecognized, and the metallogenic model and the prospecting model are set up on the basis ofstudying on the geological background, structural and alteration zoning, geophysical andgeochemical abnormally, fluid inclusions, rare earth elements and trace elements, and source ofmineralizing materials.The research means include induction, deductive method and demonstration. By induction,the gold metallogenetic regular was masted and the conceive of deposit in the working zonewas put forward through the contrast researching on the metallogenic zone and therepresentative gold deposit; By deductive method, the working site was set up in the surveyingzone on the base of the metallogenic model and the prospecting model; By demonstrationmethod, the prospect engineer was carried out affirming the the gold metallogenetic regular andthe character of the digging. The research shows that the Axile gold deposit is controlled by theAxile faulted zone and its secondary faults within Hercynian plagiogranite. The Axile faultedzone was the passageway for ore-forming fluid, while the mylonitized zone of secondary faultswere the ore body-hosted structure. The ore types are quartz vein, mylonite and altered rocktypes. The Axile gold deposit formed during late Carboniferous or early Permian, having low-mid temperature and low salinity of ore-forming fluid which was CO2-rich in the early stagehaving the elements of Fe, Co, Cu, Zn, Se, Au et al. The lanthanon is weak of fractionaldistillation. The microelements are rich of As, Se, Rh, Cd, Sb, Bi, et al.And the partition curvesof them are very similar to the deposits outside of the deposit. The fluid mass perhaps comefrom the deep-earth crust or the mantle. The main alterations of wallrocks are chloritization,kaolinization, sericitize, silicification and pyritization, the last three of which have close relations with the gold. At the location of strong alterations, geochemical abnormally are Au-Hg-Sb-Pb-Zn assemblage and physical geographical abnormally are mid-resistance and low-mid electronormally. The trench and drill engineers had finished in the surveying zone, altereddiorite rock deposit was discovered at the Axile host faulted zone, and a steady regularly vein-mylonite deposit was discovered at the drill engineer onthe second faulted zone.In this paper, that the Axile and out-side gold deposits are belong to the same mineralizingsystem, and represent different sorts of orogenic gold deposit occurring in the different tectonicbackground and host rocks. The metallogenic model and the prospecting model are set up, andgood effects have been gained in the ore prospecting. The models is significant for thesurveying works in the exploration area.