【摘要】 石湖金矿区麻棚岩体内发育大量暗色闪长岩包体,本文针对包体的LA-ICP-MS锆石年代学以及包体和寄主岩石的主微量、稀土元素进行了分析和讨论。研究表明(1)包体和麻棚岩体具有相似的微量、稀土元素特征,通过LA-ICP-MS锆石年代学研究得出包体与其寄主岩石在误差允许范围内具有相同的年龄,均为136.0±1.3Ma。(2)包体的形成可能为玄武质岩浆与花岗质岩浆复杂相互作用的产物。更多还原

【Abstract】 There are a lot of dark diorite enclaves that occur in the Mapeng batholith of the Shihu gold field. Studies show that:(1) Diorite dark enclaves and the Mapeng batholith have similar trace rare-earth elements characteristics. LA-ICP-MS Zircon U-Pb geochronology analysis of the dark diorite enclaves and the host rocks show both have similar ages with a small margin of error approximately 136.0±1.3 Ma.(2) Formation of dark diorite enclaves may be the result of a complex interaction between tholeiitic and granitic magma.更多还原