数值统计结果显示，798件沈积岩的平均极化率为2.40%，1149件火成岩的极化率为2.99%，436件变质岩的极化率为3.59%，因此，变质岩是本区较好的金属矿矿源。

• The average chargeability value of 798 sedimentary rock specimens is 2.4%25, that of 1149 igneous rock specimens is 2.99%25, and that of 436 metamorphic rock specimens is 3.59%25, which implies that the metamorphic rock might be the source of metallic ore deposits.