【摘要】 根据稳定同位素组成特点和微量元素组成及岩石形成演化的分析，对达拉布特型碱性花岗岩的源岩进行了初步探讨。指出其源岩具有混源特点：同时存在地幔物质和上地壳物质。结合岩石化学组成特点，源岩的化学组成可能与含基性、中基性火山岩的麻粒岩相岩石相似。更多还原

【Abstract】 On the basis of the forming processes of the rocks, characteristics of the stable isotopes Sr, O, Pband Nd, and trace elements indicate that the protolith of the Dalabut-type alkali granitoids may be amixture composed mainly of basaltic rocks and upper-crust materials, and similar in chemical composition to the granulitic rocks containing basaltic rocks.更多还原