By discussing genesis of sphalerite Rb-Sr isochron, it can be pointed that the mixing line produced by the tested isotopes system, which is cogenetic, syngenetic and closed, brings the geological age.
闪锌矿中的碳酸盐、硅酸盐等矿物微粒可能对铷-锶定年产生极大的影响,如不能对其进行成因鉴别或配合其他同位素定年方法加以系统研究,闪锌矿铷-锶法直线拟合结果很难反映成矿时间。
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