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

幼年英闪长岩岩浆中的混合、同化和分馏过程：华盛顿州斯图尔特山巴托利斯 (Mount Stuart Batholith)

• 批准号: 9219347
• 负责人: James Lawford Anderson
• 金额: $ 11.3万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-01 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219347&HistoricalAwards=false
• 关键词: Mixing; Assimilation; Fractionation; Processes; Juvenile

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.

这项研究的目的是阐明 高镁英云闪长质岩浆在年轻地壳中 边缘岩浆弧 理解过程 导致年轻英云闪长岩的形成是第一个- 与地壳岩浆建造有关的有序性问题 在造山带内。 拟议的研究将涉及 矿物化学、全岩和同位素收集 白垩纪斯图亚特火山岩的地球化学数据 在华盛顿瀑布群中。 该项目应澄清 高级岩浆过程的可变作用（例如， 分离，同化），以便更好地约束 更深层次过程的可变影响， 熔体形成和初始上升。