Collaborative Research: An Isotopic and Trace Element Study of Links Between Source Heterogeneity and Mantle Melting Beneath the Southeast Indian Ridge

合作研究:东南印度洋中脊下方源异质性与地幔融化之间联系的同位素和微量元素研究

基本信息

  • 批准号:
    1357036
  • 负责人:
  • 金额:
    $ 12.67万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2014
  • 资助国家:
    美国
  • 起止时间:
    2014-05-01 至 2018-04-30
  • 项目状态:
    已结题

项目摘要

The Southeast Indian ridge is a mid-ocean spreading center that lies between Australia and Antarctica. Due to its location, it is one of the least sampled and studied parts of the ocean floor. It is also where French oceanographic cruises have recently sampled a large number of closely-spaced mid-ocean ridge spreading center lavas in an effort to examine geochemical heterogeneity of the mantle on a fine scale. This research teams US scientists from San Diego State University and Oregon State University with scientists from two major French academic oceanographic institutions to carry out a comprehensive geochemical study of these lavas to help understand the crust below the Indian Ocean and how it is affected by the transfer of mantle material. Research goals are to examine the validity of a risky, new hypothesis, based on statistical analysis and theory, which proposes that mantle heterogeneity is bimodal in character and represented by streak-like chemical differences that can help us understand mantle convection and the chemical differentiation of the Earth. The US component of the work involves the analysis of radiogenic isotopes (Pb, Nd, Sr, and Hf) and trace element geochemical analyses of Southeast Indian Ridge basalt glasses. These data will be used to determine whether the streak-like Pb and Hf isotopes beneath the Southeast Indian Ridge propagate across the area, (2) investigate whether mid-ocen ridge basalt lava isotopic heterogeneity is different in the vicinity of active hotspot areas compared with those that are far from hotspots, and (3) investigate how isotopic heterogeneity relates to changes in mantle source lithology and partial melting conditions. Broader impacts of the proposal are good and involve strong international collaboration with scientists at two major French oceanographic academic institutions. The project will also help support an NSF-funded, open, isotope facility at San Diego State University and will develop, in conjunction with French colleagues, improved volcanic glass dissolution procedures, thereby building infrastructure for science. Additional impacts include undergraduate training and incorporation of research results into college student coursework.
东南印度洋海岭是位于澳大利亚和南极洲之间的洋中扩张中心。 由于其位置,它是海底采样和研究最少的部分之一。 法国海洋学考察队最近也在这里对大量密集分布的洋中脊扩张中心熔岩进行了取样,以精细地考察地幔的地球化学异质性。 这项研究由来自圣地亚哥州立大学和俄勒冈州州立大学的美国科学家与来自法国两大学术海洋学机构的科学家组成,对这些熔岩进行全面的地球化学研究,以帮助了解印度洋下方的地壳以及地幔物质转移对地壳的影响。 研究目标是检验一个基于统计分析和理论的风险性新假设的有效性,该假设提出地幔异质性具有双峰特征,并以条纹状化学差异为代表,可以帮助我们了解地幔对流和地球的化学分异。 美国部分的工作涉及放射性同位素(铅,钕,锶,铪)和微量元素地球化学分析的东南印度洋脊玄武岩玻璃的分析。 这些数据将被用来确定是否条纹状的Pb和Hf同位素东南印度洋海岭下传播整个地区,(2)调查是否在活跃的热点地区附近的中奥世脊玄武岩熔岩同位素不均匀性与那些远离热点地区相比,是不同的,(3)调查同位素不均匀性如何与地幔源岩性和部分熔融条件的变化。该提案的广泛影响是好的,涉及与法国两个主要海洋学学术机构的科学家进行强有力的国际合作。 该项目还将帮助支持圣地亚哥州立大学的一个由国家科学基金会资助的开放式同位素设施,并将与法国同事一起开发改进的火山玻璃溶解程序,从而建立科学基础设施。其他影响包括本科生培训和将研究成果纳入大学生课程。

项目成果

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Barry Hanan其他文献

Barry Hanan的其他文献

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{{ truncateString('Barry Hanan', 18)}}的其他基金

Collaborative Research: Constraining the temporal evolution of mantle plume contributions to magmatism in the Turkana Depression
合作研究:限制图尔卡纳凹陷地幔柱对岩浆作用的时间演化
  • 批准号:
    1551820
  • 财政年份:
    2016
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Standard Grant
Collaborative Research: A High-Resolution, Multi-Isotopic Study of Upper Mantle Heterogeneity Beneath the Southeast Indian Ridge
合作研究:东南印度洋中脊下方上地幔异质性的高分辨率、多同位素研究
  • 批准号:
    1029616
  • 财政年份:
    2010
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Standard Grant
Collaborative Research: Hotspot Rift Interaction & Geochemistry of the North Atlantic Mantle: A U.S.-Norwegian Expedition to Sample the Aegir Ridge "Hole" in the Iceland Hots
合作研究:热点裂谷相互作用
  • 批准号:
    0852080
  • 财政年份:
    2009
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Standard Grant
Collaborative Research: Geochemical Consequences of Slab Breakoff and Lithospheric Delamination: Examples From Turkish Neo-Volcanic Zones
合作研究:板块断裂和岩石圈分层的地球化学后果:来自土耳其新火山带的例子
  • 批准号:
    0738987
  • 财政年份:
    2008
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Continuing Grant
Collaborative Research: Chemical, Isotopic and Volatile Constraints on the Evolution of the Lau Basin
合作研究:化学、同位素和挥发物对劳盆地演化的限制
  • 批准号:
    0453138
  • 财政年份:
    2005
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Continuing Grant
Collaborative Research: Chemical Geodynamics of the Galapagos Mantle Plume-Spreading Center System
合作研究:加拉帕戈斯地幔柱扩散中心系统的化学地球动力学
  • 批准号:
    0241546
  • 财政年份:
    2003
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Standard Grant
Collaborative Research: Spatial and Temporal Geochemical Evolution of the Iceland Mantle Plume and its Dispersion Along the Mid-Atlantic Range
合作研究:冰岛地幔柱的时空地球化学演化及其沿大西洋中部的扩散
  • 批准号:
    0095714
  • 财政年份:
    2001
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Standard Grant
Collaorative Research: Magma Generation in the Early Mariana Arc System Revisited
合作研究:重新审视早期马里亚纳岛弧系统中的岩浆生成
  • 批准号:
    0001824
  • 财政年份:
    2001
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Standard Grant
An Acquisition of a Multi-Collector-Inductively Coupled Plasma-Mass Spectrometer
购买多收集器电感耦合等离子体质谱仪
  • 批准号:
    0079943
  • 财政年份:
    2000
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Standard Grant
Collaborative Research: A Geochemical Investigation of the Tortugal Komatiites of Costa Rica
合作研究:哥斯达黎加托图加尔科马提岩的地球化学调查
  • 批准号:
    9725758
  • 财政年份:
    1998
  • 资助金额:
    $ 12.67万
  • 项目类别:
    Standard Grant

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