Mixing, Assimilation, and Fractionation Processes in Juvenile Tonalite Magmas: Mount Stuart Batholith, Washington

这项拟议研究的目的是阐明与边缘相关的岩浆弧中年轻地壳中寄存的高镁英云闪长岩浆的来源。理解年轻英云闪长岩的形成过程是一个与造山带内地壳岩浆结构有关的首要问题。拟议的研究将涉及收集华盛顿瀑布白垩纪斯图亚特山岩基的矿物化学、全岩和同位素地球化学数据。该项目应澄清高级别岩浆过程(例如分馏、同化)的不同作用，以便更好地限制熔体形成和最初上升过程中运行的较深层次过程的不同影响。

The goal of the proposed research is to elucidate the origin of high-Mg tonalitic magmas hosted in juvenile crust in margin-related magmatic arcs. Understanding processes leading to the formation of juvenile tonalite is a first- order problem relevant to the magmatic construction of crust within orogenic belts. The proposed study will involve collection of mineral chemical and whole-rock and isotopic geochemical data for the Cretaceous Mount Stuart Batholith of the Washington Cascades. The project should clarify the variable roles of high-level magmatic processes (e.g., fractionation, assimilation) so as to better constrain the variable impact of deeper level processes operative during melt formation and initial ascent.