Tectonic Ore-controlling Characteristics and Prospecting Direction of the Caishigou Deposit in South-Middle Altyn

The Caishigou deposit is located in the southern side of the middle part of Altynleft-lateral strike-slip fault zone, which serves as a part of early Paleozoic Aketiaulacogen during the formation of the Akatengneng orogenic belt. It's bounded by the Aketi-Hongshuigou fault to the north and the southern Altyn fault to the south.The volcanic rocks of Ordovician TanjianshanGroup are widely distributed in this area, which is the preliminary source bed of this deposit.The NNE-extending extensional faults and nearly WE-extending faults were developed in this area, which control the development of the ore-bodies.According to the structural distribution characteristics in the strike-slip stress field and the theory of the ore-controlling law, the NE-trending and nearly EW-extending tectonics serve as the main ore-controlling structures in this deposit, the structure features and distribution of the Caishigou deposit is consistent with the theory based on the observation.In order to expand the geological prospecting achievement, the Aketi, Chaishuigou, Caishigou, Qingshuigou and Hongshuigou prospecting target zones have been defined in this area according to the studied results mentioned above and the geochemical survey achievements. The preliminary explorating results show that some occurrences have been found in most of these target zones. These results further confirmthe rationality of target zone-divination, which provide the prospecting direction in the future.