Unravelling Magmatic Processes in Continental Margin Arcs: Evidence from Comagmatic and Crustal Inclusions

这项研究建议扩大关于生产过程和来源的工作， 大陆边缘岩浆，特别是中央 安第斯山脉（火山）和塞拉内华达州（深成）省。 聚焦 将允许PI：1）更好地约束 岩浆成分和地壳成分; 2）评估 污染的时间尺度，通过检查的长度尺度， 所包含物质的同位素平衡已经发生; 3） 更好地估计地幔源区的组成， 边缘岩浆-特别是岩石圈或 软流层是主要来源; 4）质量平衡， 地壳与地幔衍生成分对 评估地壳内再循环的程度。因此， 应更好地了解影响 大陆边缘弧的岩浆成分。

This study proposes to extend work on processes and sources of continental margin magmas, with particular reference to the central Andes (volcanic) and Sierra Nevada (plutonic) provinces. Focussing on the inclusions will allow the PIs to: 1) better constrain the compositions of magmatic and crustal components; 2) evaluate timescales of contamination by examining the length scales over which isotopic equilibration of included material has occurred; 3) better estimate the composition of the mantle source to continental margin magmas - in particular whether the lithosphere or asthenosphere is the predominant source; 4) mass balance the contributions of crustal versus mantle-derived components to evaluate the extent of intra-crustal recycling. As a result, a much better understanding should be gained of the processes affecting magmatic composition in continental-margin arcs.