Mass Transfer Processes During Crustal Rifting

拟议的研究将侧重于保存在Kap Edvard Holm、Nordre Aputiteq和Patulajivit杂岩中的辉长岩和玄武岩中的矿物学和结构特征，以描述北大西洋裂谷过程中与热液交代、采场和同化有关的元素质量转移过程。为了实现这些目标，我们将解决以下问题：1)多次侵入对辉长岩和玄武岩中的热液交代作用和孔隙度和渗透率演化的累积影响是什么？2)主岩的热液交代作用如何影响在回采和同化过程中，主岩向岩浆的后续质量转移？完成这项建议中概述的研究将为了解地壳裂谷期间辉长岩所承载的岩浆-热液系统的地球化学和结构演化提供一个框架。

The proposed research will focus on the mineralogic, and structural features preserved in gabbros and basalts of the Kap Edvard Holm, Nordre Aputiteq and Patulajivit complexes in order to characterize processes of elemental mass transfer related to hydrothermal metasomatism, stoping and assimilation during rifting in the North Atlantic. To achieve these goals we will address the following questions: 1) What are the cumulative effects of multiple intrusions on hydrothermal metasomatism and the evolution of porosity and permeability in gabbroic plutons and basaltic rocks? 2) How does hydrothermal metasomatism of host rocks affect subsequent mass transfer from host rocks to magma during stoping and assimilation? Completion of the research outlined in this proposal will provide a framework for understanding the geochemical and structural evolution of gabbro-hosted magma-hydrothermal systems during crustal rifting.