Petrogenetic Studies of Young Volcanic Rocks

年轻火山岩的岩石成因研究

• 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

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.

这是一个基于成就的更新，由一位杰出的科学家，他是美国国家科学院的成员，并被海洋地质界的成员公认为该领域的领导者之一。 在过去的几十年里，他的研究改变了我们对大洋中脊和会聚边缘（如美国的卡斯卡迪亚和阿留申群岛以及太平洋的日本）发生的岩浆过程的理解。在这两种火山环境中，从地幔产生的熔融物到达地表，产生火山和熔岩，形成海洋和岛弧火山链的底部。 这一更新建立在调查员过去五年来为增进我们对海底火山活动的了解所做工作的基础上，包括建立一个内部一致的地球化学和地球物理数据库，为该数据库收集了1 000多份关于海底火山岩的新的高质量主要和微量元素分析，然后与从科学文献中收集的数千份其他类似数据相结合。 这为检验地幔温度和成分的全球模型提供了必要的数据。 这项新研究将允许确定玄武岩成分与全球范围内洋中脊的物理特性和变量之间的关系;确定控制地幔熔融，成分分馏和岩浆混合程度的原则;确定岩浆来源和来源异质性;并确定地幔温度和熔岩微量元素地球化学之间脱节的原因。 这项工作还将涉及建立一个类似的综合性大洋岛屿玄武岩地球化学数据库，该数据库可与岛屿大小、体积、海底以上高度、构造板块年龄和厚度等地球物理信息一起使用，以阐明大洋岛屿的起源和演变，并确定共同点和全球趋势。 这项工作的更广泛影响包括支持一位早期职业合作科学家，其性别在科学领域代表性不足，培训研究生，以及建立科学基础设施，以创建一个新的全面的社区数据集，该数据集将公开访问，并可用于测试和约束海洋岛屿随着时间的推移形成和增长的模型。

项目成果

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

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

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

• DOI: 10.1016/j.epsl.2017.04.051
• 发表时间: 2017-08
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: S. Turner;C. Langmuir;M. Dungan;S. Escrig