海南岛土外山早元古代玄武岩的成因──主要元素、微量元素和Sm－Nd同位素证据

The Genesis of Lower Proterozoic Basalt in Tuwaishan of Hainan Island - The Evidences from Major Elements,Trace Elements and Sm-Nd Isotope

通过对海南岛土外山金矿区抱板群斜长角闪片岩地球化学和Ｓｍ－Ｎｄ同位素的系统研究，认为这套斜长角闪片岩的原岩为起源于亏损地幔区的早元古代拉斑玄武岩。

n the light of the systematic studies of the geochemistry and Sm-Nd isotope of plagioclase-hornblend schist of the BaobanGroup in Tuwaishan of Hainan Island,we think that the protolith of the plagioclase-hornblend schist was a suit of Lower-Pro-terozoic tholeiite that was derived from the depleted mantle.