Fundamental Magmatic Processes of the McMurdo Dry Valleys

麦克默多干谷的基本岩浆过程

• 批准号: 0944043
• 负责人: Bruce Marsh
• 金额: $ 25.05万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0944043&HistoricalAwards=false
• 关键词: Fundamental; Magmatic; Processes; McMurdo; Dry

This work will explore first order principles governing magmatic processes for most planetary magmatic systems, particularly the spatial interdependence of physical and chemical processes. These basic principles are essential to planetary differentiation, the bimodality of sea floor basalt and continental granitics, modal layering in basaltic plutons, and the diversity of igneous rocks. This research will be conducted using samples from the Ferrar Magmatic System of the McMurdo Dry Valleys. The PIs seek to: 1) Complete a 1:100,000 geologic map of the entire Dry Valleys that traces in detail the extent and interactions of all the sills to help understand magmatic processes recorded by the entire system; 2) Complete analyses to establish the extent of a newly discovered Opx-Tongue in the Peneplain sill and fingerprint the two upper sills; 3) Simulate the dynamics of sorting and self-organization of granular materials dynamically similar to the massive slurries of the Dais Layered Intrusion. This work is highly integrated in its use of field, theoretical, and experimental methods to reveal and contribute to solving long-standing problems in magma transport, solidification, and differentiation. Broader impacts: Previous work by this PI has had broad scientific impacts on Antarctic Earth Sciences. The results of his work have been used to design museum exhibits, to understand ore deposition, and to understand the mitigation of magmatic hazards. Both graduate and undergraduate students will be trained in the course of this research.

这项工作将探索支配大多数行星岩浆系统的岩浆过程的一阶原理，特别是物理和化学过程的空间相互依赖。这些基本原则对于行星分异、海底玄武岩和大陆花岗岩的双峰性、玄武岩中的模式分层以及火成岩的多样性是必不可少的。这项研究将使用麦克默多干谷费勒岩浆系统的样品进行。PI试图：1)完成整个干燥山谷的1：100,000地质图，详细追踪所有岩床的范围和相互作用，以帮助了解整个系统记录的岩浆过程；2)完成分析，以确定新发现的OPX舌形岩床的范围，并对上两个岩床进行指纹；3)模拟颗粒状物质的分选和自组织动力学，动态类似于DAIS层状侵入体的大规模泥浆。这项工作在使用现场、理论和实验方法方面高度集成，以揭示并有助于解决长期存在的岩浆运输、凝固和分异问题。更广泛的影响：该国际和平研究所以前的工作对南极地球科学产生了广泛的科学影响。他的工作成果已被用于设计博物馆展品，了解矿石沉积，并了解岩浆灾害的缓解。研究生和本科生都将在这项研究的过程中接受培训。