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用同位素地球化学年代学，探讨墨江镍金矿床热水喷流同生沉积成矿时代、赋矿地层金厂岩组的形成时代．含镍金黄铁矿硅质形成时代为： Ｓｍ－Ｎｄ等时线年龄（ｔ）＝（３５８±８．６） Ｍａ（２σ） Ｒｂ－Ｓｒ等时线年龄（ｔ）＝（３５４．７± ０．７２） Ｍａ（２σ）．上泥盆统金厂岩组深水硅质岩的 Ｓｍ－Ｎｄ等时线年龄（ｔ）＝（３５９± ２１）Ｍａ（２σ），Ｒｂ－Ｓｒ等时线年龄（ｔ）＝（３５８．０２±０．３）（２σ）Ｍａ．
By using isotope geochronology, this paper discusses the formation age of the Jinchang Formation in the ore-bearing formations during the mineralization-forming era of the co-deposition of hot-water jets in the Mogui Ni-Au deposit. The age of Sm-Nd isochronal line is (358 ± 8.6) Ma (2σ). The Rb-Sr isochron age is (354.7 ± 0) .72) Ma (2σ). Sm-Nd isochron age (t) = (359 ± 21) Ma (2σ), Rb-Sr isochron age (t) = (358.02 ± 0.3) (2σ) Ma.