内蒙古准苏吉花铜钼矿区土壤地球化学 异常特征与评价

内蒙古准苏吉花铜钼矿床为典型的热液脉型矿床,矿区地表土壤中元素含量及异常特征研究表明,元素在平面上出现明显的分带性,以地表矿化露头为中心,由内向外依次为Mo-Cu-W-Bi带、In-Zn-Ag-Cd带及Pb-As-Sb带,该元素组合分带与典型中-高温热液矿床中元素分布规律基本一致。利用综合地质累积指数对土壤中主成矿元素Mo与伴生元素Cu、W、In、Bi的组合异常进行评价,共圈出4个找矿靶区,经野外异常查证与工程验证,建议在Ⅰ、Ⅱ号靶区进行深部资源预测工作,对Ⅲ、Ⅳ号靶区开展进一步查证与验证工作,以期在Ⅳ号靶区深部发现矽卡岩型矿化。本次研究对准苏吉花地区下一步勘查找矿工作的部署与开展具有重要借鉴意义。

Characteristics and Evaluation of Soil Geochemical Anomalies of the Zhunsujihua Cu-Mo Deposit in Inner Mongolia

Abstract: The Zhunsujihua copper-molybdenum deposit in Inner Mongolia is a typical hydrothermal vein type deposit. The element content and anomaly characteristics of the surface soil indicate that the elements exhibit a zonal distribution on the plane. This zonal distribution is centered by the surface mineralization outcrop, outward with a broad zone of Mo-Cu-W-Bi zone, In-Zn-Ag-Cd zone, and the outermost Pb-As-Sb zone in turn. This zonal sequence conforms to the distribution of elements in typical middle-high hydrothermal deposits. The combined anomalies of the major metallogenic element Mo and accompanying elements Cu, W, In and Bi are evaluated by geologic accumulation indices, and four target areas are determined. According to field investigations and project verification, deep-seated resource forecast is suggested to conduct in the target areas of I and II, and further investigations and verification need to be carried out in the target areas III and IV, and it is expected to discovery skarn mineralization in target area IV. This study is of great significance for deployment and implementation of the next exploration in the Zhunsujihua district.