RUI: Petrogenesis of the Felsic Series of the VandfaldsdalenMacrodike

该项目包括对东格陵兰Skaergaard侵入体附近的基性岩脉进行现场和实验室相结合的调查。该岩墙是一个复合侵入体，包括镁铁质（玄武质）和花岗岩（花岗斑岩）成分，可能作为单独的液相共存。探讨这些流体之间可能的成因联系，从基性岩浆的分异作用和地壳混染作用探讨基性岩浆的成因。拟议的工作将包括制图、选定样品的岩相学和化学分析、相同样品的Sr和Nd同位素分析以及岩脉内所含地壳捕虏体的实验熔融研究。这项工作将有助于记录影响岩浆成分演化的岩浆-围岩相互作用过程。

This project involves a combined field and laboratory investigation of a mafic dike adjacent to the Skaergaard Intrusion, East Greenland. This dike is a composite intrusion including mafic (basaltic) and silicic (granophyre) components that possibly coexisted as separate liquid phases. Possible genetic relations between these liquids will be explored to investigate origin of the silicic magma interms of differentiation and crustal contamination of the mafic magma. Proposed work will include mapping, petrographic and chemical analyses of selected samples, Sr and Nd isotopic analyses of same, and experimental melting studies of crustal xenoliths contained within the dike. This work will help document processes of magma-wall rock inter- action that influence the evolution of magma composition.