25 Million Years of Mantle Upwelling below the Mid Atlantic Ridge: The Vema Lithopsheric Section Revisited

大西洋中脊以下地幔上涌 2500 万年:重温维玛岩石层剖面

基本信息

  • 批准号:
    0551288
  • 负责人:
  • 金额:
    $ 34.13万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2006
  • 资助国家:
    美国
  • 起止时间:
    2006-03-01 至 2011-08-31
  • 项目状态:
    已结题

项目摘要

ABSTRACT Bonatti (0551288)Intellectual Merit: This research is the continuation of a project that studies an uplifted sliver of oceanic lithosphere that exposes upper mantle and seafloor crustal units along the Vema Lithospheric Section. This field area provides an opportunity to monitor how processes of seafloor lithospheric generation have changed over the last 25 million years. The project combines multibeam, gravity, magnetics and seismic reflection geophysical data with geochemical and isotopic analyses of closely spaced geochemical samples of the exposed mantle ultramafic basal units and the crustal basaltic units. Samples of peridotites, gabbros, and basalts (including fresh glass) were collected during the April-May 2005 field season augmenting the original study by 32 additional sites and extending the time coverage of the sample suite by 10 million years. Geochemical work includes major and trace element analyses of mantle equilibrated pyroxenes and spinels. These data will be used to refine patterns of mantle thermal properties, composition, and melting processes. Major and trace element analyses of basaltic glasses will be used to obtain independent estimates of the extent of mantle melting. Sr-Nd-Pb isotope compositions of pyroxenes from peridotites and basaltic glasses will be used to determine genetic links between the mantle and crustal basalts. Results will test the idea that short-scale isotopic heterogeneities of upper mantle peridotites are homogenized in the melt that derives from a broad region of the upper mantle. Combined geochemical and geophysical data from the study will permit 3D modeling of lithosphere formation. Broader impacts: This project will fund researchers from New York State, one of whom is a female, early career scientist. Undergraduates will be involved in the research as will faculty and students at the urban Queens College campus of the City University of New York which has a high enrollment of minorities under-represented in the sciences. Analytical data will be archived and made available to the public through the PetDb petrologic database at Lamont-Doherty Earth Observatory.
Bonatti(0551288)学术价值:本研究是一个研究沿Vema岩石圈剖面暴露上地幔和海底地壳单元的海洋岩石圈隆起带项目的延续。该区域提供了一个监测海底岩石圈生成过程在过去2500万年中如何变化的机会。该项目将多波束、重力、磁力和地震反射地球物理数据与对暴露的地幔超基性单元和地壳玄武岩单元的紧密间隔地球化学样品的地球化学和同位素分析相结合。在2005年4 - 5月的野外季节收集了橄榄岩、辉长岩和玄武岩(包括新鲜玻璃)的样品,增加了32个额外的地点,并将样品组的时间覆盖范围延长了1000万年。地球化学工作包括地幔平衡辉石和尖晶石的主要元素和微量元素分析。这些数据将用于改进地幔热性质、成分和熔化过程的模式。玄武岩玻璃的主要元素和微量元素分析将用于获得地幔熔融程度的独立估计。来自橄榄岩和玄武岩玻璃的辉石的Sr-Nd-Pb同位素组成将用于确定地幔和地壳玄武岩之间的遗传联系。结果将验证上地幔橄榄岩的短尺度同位素非均质性在源自上地幔广大区域的熔体中均质化的观点。结合地球化学和地球物理数据的研究将允许岩石圈形成的三维建模。更广泛的影响:该项目将资助来自纽约州的研究人员,其中一位是女性,职业生涯早期的科学家。本科生将参与这项研究,纽约城市大学皇后学院城市校区的教师和学生也将参与这项研究,该校区的少数民族学生在科学领域的代表性不足。分析数据将存档,并通过拉蒙特-多尔蒂地球观测站的PetDb岩石学数据库向公众提供。

项目成果

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Enrico Bonatti其他文献

Rifting or drifting in the Red Sea?
在红海裂谷还是漂移?
  • DOI:
    10.1038/330692a0
  • 发表时间:
    1987-12-31
  • 期刊:
  • 影响因子:
    48.500
  • 作者:
    Enrico Bonatti
  • 通讯作者:
    Enrico Bonatti
Deep sea volcanism
  • DOI:
    10.1007/bf00599973
  • 发表时间:
    1970-08-01
  • 期刊:
  • 影响因子:
    2.100
  • 作者:
    Enrico Bonatti
  • 通讯作者:
    Enrico Bonatti
Oscillatory spreading explanation of anomalously old uplifted crust near oceanic transforms
大洋转换带附近异常古老隆升地壳的振荡扩展解释
  • DOI:
    10.1038/300343a0
  • 发表时间:
    1982-11-25
  • 期刊:
  • 影响因子:
    48.500
  • 作者:
    Enrico Bonatti;Kathleen Crane
  • 通讯作者:
    Kathleen Crane
Oedipus, turkeys, and a revolution in the earth sciences
Evaporites and continental drift
  • DOI:
    10.1007/bf00600043
  • 发表时间:
    1970-03-01
  • 期刊:
  • 影响因子:
    2.100
  • 作者:
    Enrico Bonatti;Mahlon Ball;Carl Schubert
  • 通讯作者:
    Carl Schubert

Enrico Bonatti的其他文献

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{{ truncateString('Enrico Bonatti', 18)}}的其他基金

Oceanic Lithosphere Created at a Segment of the Mid Atlantic Ridge: A 20 Million Year History
大西洋中脊一段形成的海洋岩石圈:2000万年的历史
  • 批准号:
    0328217
  • 财政年份:
    2003
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Standard Grant
Testing Evolution Models for Garnet Peridotite in the Mantle and Crust during Orogenic Cycles
测试造山旋回期间地幔和地壳中石榴橄榄岩的演化模型
  • 批准号:
    0000937
  • 财政年份:
    2000
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Standard Grant
Temporal Variations in Processes of Lithosphere Formation at the Mid Atlantic Ridge
大西洋中脊岩石圈形成过程的时间变化
  • 批准号:
    9911753
  • 财政年份:
    2000
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Continuing Grant
Small-Scale Mantle Heterogeneity Beneath Mid Ocean Ridges: Peridotites from 0 Degrees - 15 Degrees N, Mid Atlantic Ridge
大洋中脊下方的小规模地幔异质性:大西洋中脊北纬 0 度 - 15 度的橄榄岩
  • 批准号:
    9116742
  • 财政年份:
    1993
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Standard Grant
Mantle Peridotites from the Ocean Basins: Petrology and Geochemistry
大洋盆地幔橄榄岩:岩石学和地球化学
  • 批准号:
    8901587
  • 财政年份:
    1989
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Standard Grant
A Study of Recently Uplifted Upper Mantle and Lower Crustal Sections from the Red Sea: Implications for Rifting and the Opening of Oceans
对红海最近隆起的上地幔和下地壳部分的研究:对裂谷和海洋开放的影响
  • 批准号:
    8816948
  • 财政年份:
    1989
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Continuing grant
Petrology of Mantle Derived Peridotites from the Atlantic and the Red Sea
大西洋和红海地幔橄榄岩的岩石学
  • 批准号:
    8516747
  • 财政年份:
    1986
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Standard Grant
Petrology and Geochemistry of Ultramafic-Mafic Complex from the Island of Zabargad and Adjacent Red Sea Areas
扎巴尔加德岛及邻近红海地区超镁铁质-镁铁质杂岩的岩石学和地球化学
  • 批准号:
    8315933
  • 财政年份:
    1983
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Continuing grant
A Petrological Study of Oceanic Ultramafic Rocks
大洋超镁铁质岩石的岩石学研究
  • 批准号:
    8025252
  • 财政年份:
    1981
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Continuing grant
A Petrological Study of Oceanic Ultramafic Rocks
大洋超镁铁质岩石的岩石学研究
  • 批准号:
    7819453
  • 财政年份:
    1979
  • 资助金额:
    $ 34.13万
  • 项目类别:
    Continuing grant

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