金厂沟梁金矿床矿脉原生地球化学特征及深部含矿性评价

金厂沟梁金矿床的矿脉走向主要为NW向和近SN向 ,NW向矿脉中矿体赋存深度比近SN向矿脉浅约 2 0 0m。近南北向矿脉的金矿体主要赋存在矿脉向西凸出与平稳变化的转折部位。As、Sb含量和F3因子得分值的高值指示矿体上部 ,Co、Mo含量和F5因子得分值的高值指示矿体的下部或尾部。黄铁矿是最主要的载金矿物 ,中粒、半自形晶 ,碎裂发育 ,晶体内含杂质较多的黄铁矿含金率高。在东矿区 ,近SN向矿脉的探矿重点应放在寻找六中段以上部位的平行矿脉 ,NW向矿脉的探矿重点应放在二—三中段以上的较浅部位

PRIMARY GEOCHEMICAL FEATURES OF GOLD LODES AND DEEP ORE-BEARING POTENTIAL PREDICTION OF THE JINCHANGGOULIANG GOLD DEPOSIT, INNER MONGOLIA

Gold lodes in the Jichanggouliang gold deposit mainly strike NW and nearly NS and the mineralizing depth of ore bodies in the NW-trending lodes is about 200m, shallower than that in the NS-trending lodes. Au ore bodies in the NS-trending lodes are concentrated mainly in the transitional zone between the sectors of the lodes convex to the west and sectors smoothly extending. The high values of As, Sb and F 3 are produced in the upper part of ore body while Co, Mo and F 5 in the lower part or the rear of the ore body. Pyrite is the main gold-bearing mineral. Moderately grain-sized, subidiomorphic pyrite with cataclastic texture and a large amount of impurities usually contains high gold. In the eastern mine of the deposit, explorative effort should be devoted to the parallel gold lodes trending NS above level 6 and to the shallower sites above levels 2—3 in the NW-trending lodes.