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中文摘要：
对赣东北鹅湖岩体进行了SHRIMP锆石U-Pb年代学、元素和Sr-Nd-Hf同位素地球化学及岩石成因研究。SHRIMP锆石U-Pb定年结果表明,鹅湖岩体形成于早白垩世的（121.7±2.9）Ma;岩相学及元素和Sr-Nd-Hf同位素特征表明鹅湖花岗岩属于S型,主要是由地壳深处（至少40km）的古元古代变质沉积岩发生部分熔融形成的,成岩过程中并没有发生强烈的分离结晶作用和幔源岩浆混合作用,赣东北地区早白垩世伸展构造背景造成的软流圈地幔上涌可能是下地壳岩石发生部分熔融的诱因。
英文摘要：
In this study,we present detailed SHRIMP zircon U-Pb chronology,major and trace elements,and Sr-Nd-Hf isotope data for the Ehu pluton in northeastern Jiangxi province,in an attempt to better constrain its petrogenesis.SHRIMP zircon U-Pb dating shows that the Ehu pluton was emplaced in the Early Cretaceous（121.7 Ma±2.9 Ma）.Petrographic,elemental and Sr-Nd-Hf isotopic characteristics suggest that the Ehu granites are of S-type,generated by partial melting of Paleoproterozoic metasedimentary basement in the deep（40 km）crust,with no fractional crystallization and mantle-derived magma mixing in their evolution.The upwelling of asthenosphere during the Early Cretaceous extensional tectonic regime in the region induced partial melting of the lower crust.
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