Geochemical Differences Between the Mantle Beneath Northern Versus Southern Costa Rica

发展中国家科学奖支持合作 加州大学圣克鲁斯分校的詹姆斯·吉尔 和哥斯达黎加国立大学的爱德华多·马拉瓦西。 该项目旨在测试研究人员的假设， 最近在科斯塔中部发现了地球动力学不连续性 Rica对化学成分有着根本性的影响， 岩浆在那里。 环太平洋的岩浆活动导致地球上大部分的火山 危险，是维持和 对地壳进行再加工 岩浆的来源并不可靠 明白 中部尼加拉瓜-哥斯达黎加地区 美洲火山弧是重要的天然实验室 为了研究空间和时间的性质和原因， 年轻火山岩成分的变化。 这 该项目将导致对岩浆形成过程的深入了解， 火山弧是火山学的重要课题 研究人员将收集 准备哥斯达黎加的火山岩， 在美国的实验室工作 哥斯达黎加的研究表明， 在收集、选择和准备方面的专业知识， 哥斯达黎加特有的样本。 美国研究人员，一个世界 弧火山专家，将提供SRF和质谱 同位素分析，这是哥斯达黎加所缺乏的能力。

This Science in Developing Countries award supports collaboration between James Gill of the University of California at Santa Cruz and Eduardo Malavassi of the Universidad Nacional in Costa Rica. The project aims to test the investigators' hypothesis that a recently discovered geodynamic discontinuity in central Costa Rica has a fundamental influence on the chemical composition of magmas there. Circum-Pacific magmatism causes most of the earth's volcanic hazards and is the chief mechanism for maintaining and reprocessing the earth's crust. The magma's origins are poorly understood. The Nicaragua-Costa Rica sector of the Central American volcanic arc constitutes an important natural laboratory for studying the nature of and reasons for spatial and temporal variations in the composition of young volcanic rocks. This project will lead to insights into the magma-forming process at arcs, a vital topic in volcanology. The researchers will collect and prepare recent volcanic rocks in Costa Rica and perform labwork in the United States. The Costa Rican research has expertise in the collection, selection, and preparation of samples specific to Costa Rica. The U.S. researcher, a world expert in arc volcanoes, will provide SRF and mass spectrometry isotope analysis, capabilities which Costa Rica lacks.