在详细推导~(40)Ar/~(39)Ar-~(36)Ar/~(39)Ar等时线理论公式的基础上,利用具体的实验实例说明这种等时线方法的意义;利用~(40)Ar/~(39)Ar-~(36)Ar/~(39)Ar等时线方法进一步探讨我国新疆南天山7个石英脉样品的等时线年龄,证实查汗萨拉锑、银矿带的成矿时代为燕山期,成矿的时空特征呈现西部早、东部晚的趋势。 Based on the detailed derivation of the theorem of ~ (40) Ar / ~ (39) Ar- ~ (36) Ar / ~ (39) Ar and other time series, the significance of this isochron method is demonstrated by concrete examples. The isochron age of seven quartz veins in the southern Tianshan Mountains of China was further studied by the isochron method of ~ (40) Ar / ~ (39) Ar- ~ (36) Ar / ~ (39) Ar, The mineralization age of antimony and silver belt is Yanshanian, and the temporal and spatial characteristics of mineralization show the trend of the early west and the late east.