Petrogenetic Studies of Young Volcanic Rocks

年轻火山岩的岩石成因研究

基本信息

批准号：
1634421
负责人：
Charles Langmuir
金额：
$ 51.25万
依托单位：
Harvard University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2016
资助国家：
美国
起止时间：
2016-08-01 至 2021-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1634421&HistoricalAwards=false
关键词：
Petrogenetic Studies Young Volcanic Rocks

项目摘要

This is an Accomplishment Based Renewal by an outstanding scientist who is a member of the US National Academy of Sciences and universally acknowledged by members of the marine geology community as one of the leaders in the field. His research, over the past few decades, has transformed our understanding of magmatic process occurring at mid-ocean ridges and convergent margins like Cascadia and the Aleutians in the US and Japan in Pacific. In both volcanic environments, melts arising from the mantle come to the surface and produce the volcanoes and lavas that form the floor of the oceans and island arc volcanic chains. This renewal builds off the investigator's work over the last five years in improving our understanding of seafloor volcanism, including the creation of an internally consistent geochemical and geophysical database for which over 1,000 new high quality major and trace element analyses of seafloor volcanic rocks were collected and then combined with thousands of other similar data collected from the scientific literature. This has provided the essential data needed to test global models of mantle temperature and composition. The new research will allow determination of the relationship between basalt composition and the physical properties and variables of mid-ocean ridges on a global scale; determine the principles that control the extent of mantle melting, compositional fractionation, and magma mixing; identify magma sources and source heterogeneity; and determine the causes of the disconnect between mantle temperatures and lava trace element geochemistry. This work will also involve the creation of a similarly comprehensive geochemical database for ocean island basalts, which can be used with geophysical information such as island size, volume, height above the seafloor, and tectonic plate age and thickness to illuminate the origin and evolution of ocean islands and identify commonalities and global trends. Broader impacts of the work include support of an early career collaborating scientist whose gender is under-represented in the sciences, training of a graduate students, and building infrastructure for science in terms of creating a new comprehensive community dataset that will be publicly accessible and can be used to test and constrain models for the formation and growth of ocean islands over time.

这是一位杰出科学家的基于成就的续签，他是美国国家科学院的成员，并被海洋地质社区成员普遍承认，是该领域的领导者之一。在过去的几十年中，他的研究改变了我们对中山山脊上发生的岩浆过程的理解，以及在美国和日本在太平洋地区的卡斯卡迪亚和阿留申者等融合边缘。在两个火山环境中，地幔产生的熔体都出现在地面，产生了构成海洋和岛弧火山链的火山和熔岩。这一更新建立在过去五年中，在提高我们对海底火山的理解方面的工作，包括创建内部一致的地球化学和地球物理数据库，为1,000多个新的高质量大型和痕量元素分析，对海底火山岩石进行了收集，然后与其他类似的科学数据收集到了成千上万的科学文献。这提供了测试地幔温度和成分的全球模型所需的基本数据。新的研究将允许确定全球范围内玄武岩成分与中山脊的物理特性和变量之间的关系；确定控制地幔熔化程度，组成分馏和岩浆混合的原理；识别岩浆来源和来源异质性；并确定地幔温度与熔岩痕量元件地球化学之间断开连接的原因。这项工作还将涉及为海洋岛玄武岩的类似综合的地球化学数据库创建，该数据库可与地球物理信息一起使用，例如岛屿的大小，体积，高度高于海底的高度以及构造板板的年龄和厚度，以照亮海洋岛屿的起源和进化，并确定通用性和全球趋势。这项工作的更广泛的影响包括支持早期职业合作的科学家，其性别在科学中的代表性不足，培训研究生以及为科学建设基础设施，以创建新的综合社区数据集，可以公开访问该数据集，并可以用来测试和约束海洋岛的形成和成长模型。

项目成果

期刊论文数量（6）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

A high carbon content of the Hawaiian mantle from olivine-hosted melt inclusions

DOI：
10.1016/j.gca.2019.04.001
发表时间：
2019-06
期刊：
Geochimica et Cosmochimica Acta
影响因子：
5
作者：
J. Tucker;E. Hauri;A. Pietruszka;Michael O. Garcia;J. Marske;F. Trusdell
通讯作者：
J. Tucker;E. Hauri;A. Pietruszka;Michael O. Garcia;J. Marske;F. Trusdell

Geochemical Variability Along the Northern East Pacific Rise: Coincident Source Composition and Ridge Segmentation

DOI：
10.1029/2019gc008287
发表时间：
2019-04
期刊：
Geochemistry
影响因子：
3.7
作者：
S. Mallick;V. Salters;C. Langmuir
通讯作者：
S. Mallick;V. Salters;C. Langmuir

Plume-ridge interaction induced migration of the Hawaiian-Emperor seamounts

羽-脊相互作用引起夏威夷-皇帝海山的迁移

DOI：
10.1016/j.scib.2021.04.028
发表时间：
2021
期刊：
Science Bulletin
影响因子：
18.9
作者：
Sun, Weidong;Langmuir, Charles H.;Ribe, Neil M.;Zhang, Lipeng;Sun, Saijun;Li, He;Li, Congying;Fan, Weiming;Tackley, Paul J.;Sanan, Patrick
通讯作者：
Sanan, Patrick

The importance of mantle wedge heterogeneity to subduction zone magmatism and the origin of EM1