Collaborative Research: A Geochemical Study of the Nature and Evolution of Mantle Upwelling Beneath Ross Island and its Relationship to Tectonics in the West Antarctica Rift System

合作研究：罗斯岛下方地幔上涌的性质和演化及其与南极洲西部裂谷系统构造关系的地球化学研究

基本信息

批准号：
1141167
负责人：
Kenneth Sims
金额：
$ 29.46万
依托单位：
University of Wyoming
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2012
资助国家：
美国
起止时间：
2012-06-15 至 2015-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1141167&HistoricalAwards=false
关键词：
Collaborative Research Geochemical Study Nature

项目摘要

Intellectual Merit: Existing petrologic and geochemical data for Ross Island volcanic centers are sparse and outdated, with the exception of the well-studied Mt. Erebus stratovolcano. Therefore, understanding of the genesis, evolution and tectonic context of alkaline magmatism on Ross Island is extremely limited. The PIs propose to conduct a field and laboratory based geochemical, isotopic, and petrologic study to investigate alkaline volcanism across the entirety of Ross Island. This study will provide: state-of-the-art isotopic abundances of Nd, Sr, Hf and Pb; pre-eruptive volatile concentrations as determined in melt inclusion studies; petrological and mineralogical information, and major and trace element concentrations for samples from Mt. Terror, Mt.Bird and Hut Point Peninsula. When combined with the published compositional and isotopic data from Mount Erebus, and the published Ar-Ar ages from Ross Island, these data will provide essential information on the nature of the mantle source and the processes and causes of magma genesis beneath Ross Island.Broader impacts: This proposal will train two PhD students, broaden the participation of underrepresented groups, promote and enhance secondary educational experiences in a formal class room setting, and encourage new investigators to become involved in USAP. The proposed research includes a collaboration with ENS, Lyon, France. This study will also establish a suite of well-described and geochemically well-characterized samples available to other researchers.

智力优点：罗斯岛火山中心的现有岩石学和地球化学数据稀疏且过时，除了经过深入研究的Erebus Stratovolcano之外。因此，对罗斯岛上碱性岩浆作用的起源，进化和构造背景的理解非常有限。 PI提议进行基于现场和实验室的地球化学，同位素和岩石学研究，以研究整个罗斯岛的碱性火山。这项研究将提供：ND，SR，HF和PB的最新同位素丰度；在熔体纳入研究中确定的喷发前挥发性浓度；质和矿物学信息，以及来自恐怖山的样品的主要和痕量元素浓度，山顶和小屋的半岛。 When combined with the published compositional and isotopic data from Mount Erebus, and the published Ar-Ar ages from Ross Island, these data will provide essential information on the nature of the mantle source and the processes and causes of magma genesis beneath Ross Island.Broader impacts: This proposal will train two PhD students, broaden the participation of underrepresented groups, promote and enhance secondary educational experiences in a formal class room setting, and鼓励新的调查人员参与USAP。拟议的研究包括与法国里昂的ENS合作。这项研究还将建立一套由其他研究人员使用的良好描述和地球化学良好的样本。