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Collaborative Research: A Collaborative Study: Geochemical Evolution of Kilauea Volcano, Hawaii - Evidence from Melt Inclusions in Three Deep Rock Cores

协作研究：协作研究：夏威夷基拉韦厄火山的地球化学演化 - 来自三个深岩芯中熔融包裹体的证据

基本信息

批准号：
9714783
负责人：
Roger Nielsen
金额：
$ 3.51万
依托单位：
Oregon State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1997
资助国家：
美国
起止时间：
1997-06-15 至 1999-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9714783&HistoricalAwards=false
关键词：
Collaborative Research Study Geochemical Evolution

项目摘要

9714783 Nielsen Volcanoes in Hawaii are among the most active on Earth. However, due to their high rates of eruption and subsidence, direct documentation of their temporal evolution is lacking. This project will use samples from three deep (~2 km) drill cores in Kilauea Volcano's Lower East Rift Zone to study magmatic processes and plume evolution in the type oceanic hotspot. The goals of this project are: (1) to document the diversity of primitive magmas, preserved as melt inclusions, in the Kilauea plumbing system over more than 100 Ka of Kilauea's history, (2) to record the change in source compositions over time, (3) to determine volumetric proportions of magmatic components contributing to Kilauea lavas through time, and (4) to evaluate connectivity of the plumbing systems of Kilauea and Mauna Loa. This study, together with an ongoing deep drilling study at Mauna Kea, an older volcano on Hawaii, can provide a much longer time-series of Hawaiian plume evolution than would be possible by conventional field sampling. This will not only enhance our understanding of the evolution of the Hawaiian plume, but will provide a benchmark for studying other hotspot volcanoes.

夏威夷的尼尔森火山是地球上最活跃的火山之一。然而，由于它们的高喷发率和沉降率，它们的时间演变的直接文件是缺乏的。该项目将使用从基拉韦厄火山的下东裂谷带的三个深（~2公里）钻芯中提取的样品，研究这类海洋热点的岩浆过程和羽流演化。该项目的目标是：（1）记录基拉韦厄历史上100多年来基拉韦厄铅垂系统中原始岩浆的多样性，以熔融包裹体的形式保存下来，（2）记录源成分随时间的变化，（3）确定随时间推移形成基拉韦厄熔岩的岩浆成分的体积比例，（4）评估基拉韦厄和莫纳罗亚山管道系统的连通性。这项研究，加上正在进行的深钻研究，在莫纳克亚，一个古老的火山在夏威夷，可以提供一个更长的时间序列的夏威夷羽演变比传统的现场采样。这不仅将增强我们对夏威夷火山柱演化的理解，而且将为研究其他热点火山提供基准。