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

这项研究建议扩大关于大陆边缘岩浆过程和来源的工作，特别是涉及中部安第斯山脉(火山)和内华达山脉(深成)省。专注于包裹体将使PI能够：1)更好地约束岩浆和地壳成分的成分；2)通过检查包裹体物质发生同位素平衡的长度尺度来评估污染的时间尺度；3)更好地估计大陆边缘岩浆的地幔来源成分--特别是岩石圈或软流圈是主要来源；4)质量平衡地壳和地幔成分的贡献，以评估地壳内循环的程度。因此，应该更好地了解影响大陆边缘弧中岩浆成分的过程。

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.