Metallogentic Conditions And Prediction Research Of Xicha Gold Deposit, Ji’an, Jilin Province

Ji’an Xicha gold deposit is located in the southeast of Jilin province Ji’an county area, metallogenic zoning is located on the eastern section of the north margin of North China Craton Archean-Proterozoic Mesozoic gold mineralization area, as the area of typical strata-bound altered rock type gold deposit belongs to the medium, the size of. Deposits are formed by the ore-bearing strata, magmatic rocks, fracture and other factors, the host rock for the mineralization of graphite biotite leptynite. Yanshan Hercynian diorite activity metallogenic thermal power. The veined, lenticular output, directly controlled by faults, ore structure, give priority to with disseminated vein. The Xicha gold deposit study, mainly has the following several points:(1)Deposits of the spatial and temporal distribution regularity of mineralization in space, mainly around the Renaissance Tuen diorite around distribution, metallogenic epoch and Yanshan Hercynian diorite formation time, the rock activity is mining area of the main metallogenic source.(2)The regional structure is complex, with multiple stages, inherited characteristic. The main structure characteristics of the region for shrimp midge ditch-West Yang bifurcated anticlinal dome was F7breaks off, direct ore-controlling structure is F7main fault and its ramification of the fracture and in parallel with the fracture, mainly manifested in the formation of the deposit, deposit spatial distribution of direct control.(3)The west fork of the ore forming material source has the dual attributes. Ore rock river two groups have suffered different degrees of migmatization. As a result of migmatization, surrounding rock for gold mineralization provided some material sources, formation is an important source bed; rock development, complex lithology, based on the sulfur isotopic characteristics were analyzed and the magmatic rocks in abundance analysis of ore-forming material sources, except in strata, rock is also an important source of ore.(4)According to the west fork gold deposit geological characteristics, summed up the fracture near the Ferritization, pyritization quartz and iron stone as the main criteria for ore prospecting; silicified, carbonation, arsenopyrite pyrite mineralization is an important criteria for ore prospecting.(5) Through to the prospecting of geological, geophysical, geochemical markers of the summary, comprehensive analysis of Jinchanggou gold-west fork area and bright red roof-Renaissance Village-Nancha lots and west fork of ore bodies peripheral and deep and has good ore prospects.