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

本研究的目的是阐明在与边缘有关的岩浆弧中赋存于幼年地壳中的高镁调性岩浆的成因。了解幼小方闪岩的形成过程是造山带地壳岩浆构造的一级问题。拟议的研究将包括收集华盛顿瀑布白垩纪斯图尔特山基岩的矿物化学和全岩以及同位素地球化学数据。该项目应阐明高层岩浆过程（如分馏、同化）的可变作用，以便更好地约束熔体形成和初始上升过程中较深层过程的可变影响。

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.