青海省德令哈市滚艾尔沟地区物化探异常特征与找矿前景

Geophysical and geochemical anomalous characteristics and ore prospecting potential in Gun'aiergou area,Delingha City,Qinghai Province

滚艾尔沟地区位于柴北缘成矿带,分析和研究该区的综合异常特征对于确定成矿类型及进一步找矿工作具有重要的指导意义。通过在研究区开展的1∶5万地质矿产调查工作,圈定多处组合异常,并结合地层、构造、岩性等地质因素对异常进行剖析评价。激电中梯异常在本区与矿化有较好的对应关系,低电阻率、高极化率的异常可指示铜矿化或蚀变带的分布。化探结果显示,在水系异常中圈定的土壤异常与已发现的矿化线索相吻合。结合本区地质、物化探异常特征及区域成矿规律,初步认为在本区有寻找热液充填交代型Pb-Zn-Cu矿床和构造蚀变岩型Cu-Au矿床的潜力。物化探成果可为下一步工作部署提供依据。

Gun＇aiergou area is located on the metallogenic belt of the northern margin of Qaidam basin. Analysis and study of the characteristics of the anomaly in this area is of great significance in determining the type of ore deposits and guiding further prospecting. Based on the 1 ∶ 50 000 geological mineral resources survey carried out in the research area,the paper delineated several combination anomalies,which were dissected and evaluated from the aspects of strata,tectonics and lithology. IP intermediate gradient anomalies had good corresponding relationship with the mineralization in this area. The low resistivity and high polarizability may indicate the distribution of copper mineralization or alteration belt. Geochemical survey results found that the soil-anomalies delineated in stream sediment anomalies were consistent with the mineralization clues. Based on the regional geological,geophysical and geochemical anomalous characteristics and the peripheral ore-forming regularity,the paper can preliminarily conclude that this area has the potential to find hydrothermal fluids-filled metasomatic Pb-Zn-Cu deposits and tectonic-altered rocks type Cu-Au deposits. The geophysical and geochemical survey achievements can guide the next-step work.