权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

U.S.-Costa Rica Dissertation Enhancement: The Origin of Silicic Magmas in an Island Arc; A Study of the Valle Central Chemical Zoned Ash-Flow

美国-哥斯达黎加论文强化：岛弧中硅质岩浆的起源；

基本信息

批准号：
9819236
负责人：
Thomas Vogel
金额：
$ 0.63万
依托单位：
Michigan State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-02-01 至 2001-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9819236&HistoricalAwards=false
关键词：
U.S.Costa Rica Dissertation Enhancement

项目摘要

9819236VogelThis Americas Program award will fund a dissertation enhancement grant for Ms. Rachel Hannah, under the supervision of Dr. Thomas Vogel, Michigan State University, for a study of the origin of silicic magmas, an unusual occurrence in an island arc where there is no continental crust. The research will be conducted in collaboration with Dr. Guillermo Alvarado, School of Geology, University of Costa Rica. With the long-range goal of determining the origin of the high-silica-magmas that occur in Costa Rica, the researcher will conduct a specific, detailed study of the highly zoned ash-flow deposits of the Central volcanic range and a preliminary comparison with the volume ash-flow sheets in the Guanacaste volcanic range in northwestern Costa Rica. She will work on the chemical variation of the Valle Central ash-flow sheet, combining the chemical stratigraphy and the physical stratigraphy into one model for emplacement and interpreting the results. The data obtained will lead to a better understanding of the origin and evolution of continental crust, and may be able to address the fundamental question of why are silicic magmas produced in some island arc systems and not in others. The University of Costa Rica (UCR) and Michigan State University (MSU) complement each other in their research capabilities. CRU can provide valuable knowledge of the local geology and an understanding of the physical volcanology in the area, and the MSU researchers bring the expertise in chemical petrology and the analytical equipment necessary for in-depth geochemical research. ***

9819236 Vogel这个美洲计划奖将资助Rachel Hannah女士在密歇根州立大学托马斯·沃格尔博士的监督下进行的论文改进补助金，用于研究岩浆的起源，这是一种在没有大陆地壳的岛弧中不寻常的现象。这项研究将与哥斯达黎加大学地质学院的吉列尔莫阿尔瓦拉多博士合作进行。为了确定发生在哥斯达黎加的高硅岩浆的起源这一长期目标，研究人员将对中央火山山脉的高度分区的灰流沉积物进行具体、详细的研究，并与哥斯达黎加西北部瓜纳卡斯特火山山脉的灰流卷进行初步比较。她将研究瓦莱中央灰流片的化学变化，将化学地层学和物理地层学结合成一个模型，用于定位和解释结果。所获得的数据将有助于更好地了解大陆地壳的起源和演变，并可能解决为什么在某些岛弧系统而不是在其他岛弧系统中产生岩浆的根本问题。哥斯达黎加大学（UCR）和密歇根州立大学（MSU）在研究能力上相互补充。 CRU可以提供当地地质的宝贵知识和对该地区物理火山学的了解，密歇根州立大学的研究人员带来了化学岩石学方面的专业知识和深入地球化学研究所需的分析设备。 ***