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
- 来源:
- 关键词:
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.
博纳蒂(0551288)的学术价值:这项研究是一个项目的继续,该项目研究了沿维马岩石圈部分暴露出上地幔和海底地壳单元的大洋岩石圈隆起的狭长地带。这一领域提供了一个机会来监测海底岩石圈的形成过程在过去2500万年中发生了怎样的变化。该项目将多波束、重、磁和地震反射地球物理数据与暴露的地幔超镁铁基单元和地壳玄武岩单元的近距离地球化学样品的地球化学和同位素分析结合在一起。橄榄岩、辉长岩和玄武岩(包括新鲜玻璃)的样品是在2005年4月至5月的野外季节采集的,使最初的研究增加了32个地点,并将样本系列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元素和微量元素分析。这些数据将被用来改进地幔热物性、成分和熔融过程的模式。将使用玄武岩玻璃的主要元素和微量元素分析来获得对地幔熔融程度的独立估计。橄榄岩和玄武岩玻璃中辉石的锶-钕-铅同位素组成将被用来确定地幔和地壳玄武岩之间的成因联系。结果将检验这样一种观点,即上地幔橄榄岩的短尺度同位素不均匀在来自上地幔大片区域的熔体中均一化。这项研究结合了地球化学和地球物理数据,将可以对岩石圈的形成进行3D建模。更广泛的影响:该项目将资助纽约州的研究人员,其中一人是早期职业生涯的女性科学家。本科生将参与这项研究,纽约城市大学城市皇后学院校区的教职员工和学生也将参与这项研究,那里的少数民族入学率很高,在科学界的代表性不足。分析数据将被存档,并通过Lamont-Doherty地球天文台的PetDb岩石学数据库向公众提供。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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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
- DOI:
10.1007/s00531-007-0196-9 - 发表时间:
2007-05-30 - 期刊:
- 影响因子:2.000
- 作者:
Enrico Bonatti - 通讯作者:
Enrico Bonatti
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
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
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
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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