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海南岛中北部三叠纪花岗岩源区的锶、钕同位素制约及其意义

, PP. 234-243

Keywords: 锶、钕同位素,花岗岩,海南岛

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Abstract:

海南岛中北部三叠纪花岗岩的锶、钕同位素初始比值分别为I(Sr)0.7080~0.71505、εNd(t)-10~-5,表明这些花岗岩属壳源型,其源岩主要为海南岛结晶基底中元古界抱板群,但受到了幔源岩浆的混染。这些花岗岩所表现出来的基本一致的锶、钕同位素特征,表明测区具有统一的前寒武纪基底。

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