北塔山牧场一带金地球化学特征及找矿预测  

Gold Geochemical Characteristic and Prospecting Prediction in Beita Mountain Pasture Region

作　　者：叶征宇[1] 匡爱兵[1] 廖洪明[1] 李双江 李政 

机构地区：[1]四川省核工业地质调查院,四川成都610061 [2]四川金核矿业有限公司,四川成都610061

出　　处：《金属矿山》2014年第12期138-142,共5页Metal Mine

摘　　要：基于新疆奇台县北塔山牧场一带的1∶50 000地球化学普查成果,初步总结了该地区的金元素地球化学特征。该地区具有优越的金成矿地质条件,数理统计结果显示,志留纪白山包组是金的主要赋矿层位,其内金元素含量平均值远高于研究区其他地层,晚石炭世混源系列侵入岩也有利于金成矿,侵入白山包组的花岗斑岩脉更是直接的找矿标志。金异常的分布主要受断裂构造、地层及岩浆岩的控制,金矿点、矿化点主要沿NW向断裂分布。与金共生的异常组合类型多样,主要有Au-Sb-Cu-Ag及Au-As-Sb两种。阿克塔斯阔腊金矿形成的HS-21#综合异常中,Au含量平均值为8.78×10-9,峰值达53.8×10-9,通过异常查证,发现了一批金矿化点,其地球化学特征类似于阿克塔斯阔腊金矿,成因类型为中低温岩浆热液型,显示了本区内该类型金矿具有良好的找矿前景,为资源潜力评价和成矿基础地质研究提供了依据。According to the 1∶ 50 000 geochemical survey results of Beita mountain pasture region,the gold geochemical characteristics is summarized preliminarily. The ore-forming geological conditions of Beita mountain pasture region are superior to others. The statistics indicate that,Baishanbao stratum of Silurian period is main gold ore-bearing strata in Beita mountain pasture region,and the average content of gold in Baishanbao stratum of Silurian period is higher than other strata. The mixed source series intrusive rocks of late carboniferous are beneficial to gold mineralization,and the granite porphyry vein which invaded into Baishanbao stratum is a direct prospecting criteria. The distribution of gold-anomaly is controlled by fault structure,stratum and magmatic rocks,gold occurrences and gold mineralization points arrangement along the NW-trending faults structure. There are many types of element anomaly combinations in which Au-Sb-Cu-Ag and Au-As-Sb are the main types. The average value of Au is 8. 78 × 10^-9with peak value is 53. 8 × 10^-9in HS-21^#anomaly of the Aketasikuola gold mining area. After anomaly inspection,the gold mineralization points that have been found in this region have similar geochemical characteristics with Aketasikuola gold ore,and the genetic type is low medium temperature magmatic hydrothermal,showing that there is a good prospecting potential in this district. The research provides evidence for the mineral resources potential assessment and the basic geological research.

关 键 词：北塔山牧场 花岗斑岩脉 金异常 地球化学特征 找矿预测 

分 类 号：P612[天文地球—矿床学]