新疆托克逊县阿热塔格山Ⅱ区的物化探异常特征

Geophysical and geochemical anomalies in area Ⅱ of Aretag Mountains in Toksun County, Xinjiang

阿热塔格山Ⅱ区处于新疆东天山萨尔明-库米什金铜铅锌成矿带上,通过综合物化探测量,研究阿热塔格山Ⅱ区物化探异常特征。结果表明,阿热塔格山Ⅱ区高磁异常多是由基性岩体引起的,低地磁异常区和低重力异常区反映了中酸性岩体或基性-超基性杂岩体的分布特征。Cr、Ni、Co元素异常面积较大,主要是超基性岩的高背景值造成的。阿热塔格山Ⅱ区极化率异常值介于0.20%~8.28%,整体上呈南东小北西大的分布特征,指示该区硫化物发育。阿热塔格山Ⅱ区成矿条件较好,具有寻找斑岩型硫化物为主的多金属矿潜力。

This paper describes an investigation into the geophysical and geochemical anomalies in Aretag Ⅱ area,based on the exploration results in Aretag Ⅱ area of Toksun County, Xinjiang. The results show that the high magnetic anomalies in Aretag Ⅱ area result mostly from basic rocks, and the local enrichment of magnetic bodies can lead to local magnetic anomalies. The larger anomalous area of elements Cr, Ni and Co, is mainly due to the high background value of ultrabasic rocks. Low geomagnetic anomaly area and low gravity anomaly area are the reflection of the distribution characteristics of intermediate-acidic rock mass or basic-ultrabasic complex, indicating the development of sulfide in this area. The polarizability anomaly values of Aretag Ⅱ ranging from 0.20% to 8.28% exhibit the distribution pattern characterized by being smaller in the southeast and larger in the northwest. The better metallogenic conditions of Aretag Ⅱ area shows the potential for polymetallic deposits dominated by porphyry sulfides.