中文摘要：

Re-Os同位素体系可以为研究大陆岩石圈地幔形成和演化提供重要制约.女山12个地幔橄榄岩全岩样品测得Re含量为19×10^-12～306×10^-12, Os含量为0.81×10-9～2.42×10^-9, 187^Os/188^Os比值为0.114 90～0.131 02, 187^Re/188^Os比值为0.037～1.517. 两个石榴子石-尖晶石二辉橄榄岩的Os同位素组成与原始上地幔（PUM）的现代值0.129 6相似, 其余的尖晶石二辉橄榄岩、方辉橄榄岩, 和角闪石、金云母-尖晶石二辉橄榄岩等的Os同位素组成都低于PUM现代值, Os同位素模式年龄为早元古代.实性和隐性地幔交代作用对女山幔源橄榄岩捕虏体的Os同位素组成没有明显影响. 橄榄岩捕虏体代表的女山地区岩石圈地幔是元古代岩石圈地幔经过减薄作用后的残留部分. 橄榄岩中Re-Os体系扰动是近期事件.

英文摘要：

Geochemistry of Re-Os isotopic systematics may offer strong constraints on origin and evolution of subcontinental lithospheric mantle. 12 mantle peridotite samples from Nushan, eastern Anhui, were analysed for Re-Os isotopic systematics. The Re concentrations vary from 19 ×10^-12 to 306 ×10^-12 and the Os concentrations vary from 0.81 ×10^9 to 2.42 ×10^9 for the sample set. The 187^Os/188^Os ratios range from 0. 114 90 to 0. 131 02 and 187^Re/188^Os ratios range from 0. 037 to 1. 517. The 187^Os/188^Os ratios of 2 garnet-spinel lherzolite are slightly higher than 0. 129 6, the present value of primitive upper mantle （PUM）. The others including spinel lherzolite, harzburgite, amphibole-and-phlogopite-spinel lherzolite are lower than 0. 1296. The Os isotope model age of Nushan lithospheric mantle formation was estimated as early proterozoic. The Os isotopic compositions of mantle peridotite xenoliths were not effected significantly by the mode or cryptical mantle metasomatism. The disturbance of Re-Os isotope system resulted from the relatively recent event.