博格达山东段原生晕地球化学异常特征及评价

Primary Halo Characteristics and Evaluation of Geochemical Anomalies of Eastern Bogda Mountains

在博格达山东段利用原生晕地球化学研究的方法,对一些成矿元素的原生晕进行了分析与评价。成矿元素定量分析结果表明,Cu、Zn、As等3种元素在研究区为强富集元素,Pb、Co为富集元素;多元统计分析显示主成矿元素Cu与Zn、Pb具有较强的相关性,其相关系数分别为0.544、0.416,R型聚类划分出的Cu-Zn-Pb,Hg-Cr-Au组合代表与铜矿化有关的亲硫、中温环境;单元素具有水平分带性,以单元素异常下限值和陆壳克拉克值为划分标准,圈定了4个Ⅲ级化探异常带,并根据原生晕元素富集赋存特征、组合特点及空间分布特征,初步评价认为研究区Cu-Pb-Zn-Cr-Au-Hg多元素叠加异常为找矿有利地段。

Primary halos of some ore-forming elements are ana- lyzed and evaluated through the primary halo geochemical meth- ods in eastern Bogda Mountains. The trace quantitative analysis re- sults of ore-forming elements in Eastern Bogda Mountains showed that, three kinds of elements Cu, Zn, As are strong enriched ele- ments in the study area and Pb and Co are enriched elements. Mul- tivariate statistical analysis showed that the main metallogenic ele- ments Cu has a strong correlation with Zn and Pb, the correlation coefficients is 0.544 and 0.416 respectively, R clustering of Cu-Zn- Pb combination and Hg-Cr-Au combination represents copper min- eralization related to ore-forming elements combination, near sul- fur and medium temperature environment. Single element has the horizontal zoning feature, according to the geochemical primary halo of element enrichment and occurrence characteristics and combined the characteristics and spatial distribution characteris- tics, with a single element anomaly lower limit and continental crust Clark value as the division standard, fence four Ⅲ grade geo- chemical anomaly belt and the anomaly evaluation result inferred that, existing of Cu-Pb-Zn-Cr-Au-Hg multi elements superimposed anomaly is favorable for prospecting in the study area.