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中文摘要：
通过构筑146Sm-142Nd同位素体系,应用于冥古宙（4.6～4.0Ga）时期地幔演化的研究,可以了解这一时期地幔演化过程。对太古宙岩石中142Nd的研究发现早期地幔出现明显的不均一性,造成这种不均一性的原因应该来源于地幔的分异作用。加拿大Nuvvuagittuq绿岩带来源于富集地幔和亏损地幔混合,但以富集地幔为主,格陵兰杂岩和变质砂岩来源于亏损地幔,而西澳大利亚伊儿岗片麻岩来源于富集地幔和亏损地幔的混合带,但主要以亏损地幔为主。
英文摘要：
Through the construction of the 146Sm-142Nd system and the application of Hadean（4.6～4.0Gy） mantle evolution,we can get to know the evolutionary process of this early epoch.Based on the 142Nd study of Archean rocks,the authors hold that early mantle was an inhomogeneous system because of the mantle differentiation.Canadian Nuvvuagittuq greenstone originated from the mixture of enriched and depleted mantle,with the enriched mantle playing the dominant role.Greenland mixtite and Isua metamorphosed sediments originated from depleted mantle whereas North Australian Yilgam gneiss originated from the mixture of enriched and depleted mantle,with the depleted mantle being dominant.
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