Southernmost Patagonia: The Connection Between Magmatism, Subduction Zone, Slab Window and Sub-continental Mantle Lithosphere
最南端的巴塔哥尼亚:岩浆作用、俯冲带、板片窗和次大陆地幔岩石圈之间的联系
基本信息
- 批准号:1829464
- 负责人:
- 金额:$ 31.16万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-07-01 至 2023-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The Earth's mantle represents approximately 82% by volume and 68% by mass of the Earth, and therefore, it influences the movement of tectonic plates, earthquakes and volcanism on the surface. A fundamental step to understand the composition and nature of the Earth's mantle from the study of basaltic lavas (partial melts of the mantle) is to establish the budget and distribution of volatiles (hydrogen, carbon, fluorine, chlorine, sulfur) in the Earth's interior. Volatiles influence mantle melting, magma crystallization, magma migration and volcanic eruption, and their abundances and spatial distribution provide important constraints on models of mantle flow and temperature. Moreover, volatiles are key constituents of the Earth's atmosphere and oceans and, thus, constraining the cycling of volatiles between the Earth's interior and surface is of fundamental importance to understand the long-term evolution of our planet, as they fundamentally affect plate tectonics, climate, and habitability. The project will support an African-American female graduate student, an Indian research scientist and a Hispanic Professor at Brown University. It promotes the collaboration with geochemists from nine institutions from three different countries: USA, Argentina and Chile, and will enhance the infrastructure for research and education at Brown University, Oregon State University and Woods Hole Oceanographic Institution. Communication of results will occur through: 1) peer-reviewed journals, presentations at conferences and invited university lectures, 2) hands-on science learning activities for local elementary and high school classes, and 3) outreach to the general audience through public lectures.Diverse hypotheses have been proposed for the origin of the magmatism in southern Patagonia, from flux melting of the mantle wedge during devolatilization of the subducted Nazca and Antarctic plate, to adiabatic decompression melting of a carbonated and hydrous asthenosphere upwelling through the slab window, to melting of a volatile-rich metasomatized subcontinental lithospheric mantle. All proposed hypotheses invoke the role of volatiles. Surprisingly, data on the volatile contents of basalts and mantle xenoliths from this region are non-existent. This is a glaring omission from the geochemical data given the importance of volatiles. The focus of this study will be to examine the regional and temporal variations in volatile contents and microstructure of geochemically well-characterized Eocene-recent basalts and associated mantle xenoliths co-located with the seismic array from southern Patagonia. The lavas and their xenoliths in this region represent smaller melt volumes tapped locally from areas lacking steady-state magma chambers, experience relatively less mixing and differentiation, and offer the best opportunity to determine the composition, lithology and volatile contents of the mantle sources. The integration of these geochemical and microstructural data to a previously funded seismic experiment will enable better constraints on the temperature, composition, viscosity and density structure of the mantle beneath southern Patagonia.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
地幔约占地球体积的82%和质量的68%,因此,它影响着地球表面的构造板块运动、地震和火山活动。 通过研究玄武熔岩(地幔的部分熔融)来了解地幔的组成和性质的一个基本步骤是建立地球内部挥发物(氢、碳、氟、氯、硫)的预算和分布。挥发分影响着地幔熔融、岩浆结晶、岩浆运移和火山喷发,其丰度和空间分布对地幔流动和温度模型提供了重要的制约。此外,挥发物是地球大气和海洋的关键组成部分,因此,限制地球内部和表面之间的挥发物循环对于理解我们星球的长期演化至关重要,因为它们从根本上影响板块构造,气候和可居住性。该项目将支持布朗大学的一名非洲裔美国女研究生、一名印度研究科学家和一名西班牙裔教授。它促进了与来自三个不同国家(美国、阿根廷和智利)的九个机构的地球化学家的合作,并将加强布朗大学、俄勒冈州州立大学和伍兹霍尔海洋学研究所的研究和教育基础设施。 将通过以下方式通报结果:1)同行评审的期刊,会议上的演讲和邀请的大学讲座,2)为当地小学和高中班级提供实践科学学习活动,3)通过公开讲座向普通观众推广。对于巴塔哥尼亚南部岩浆活动的起源,人们提出了各种各样的假设,从俯冲的纳斯卡和南极板块脱挥发分过程中地幔楔的通量熔融,到通过板窗上涌的碳酸盐和含水软流圈的绝热减压熔融,再到富含挥发分的交代的次大陆岩石圈地幔的熔融。所有提出的假说都援引了挥发分的作用。令人惊讶的是,关于该地区玄武岩和地幔捕虏体的挥发分含量的数据是不存在的。考虑到挥发物的重要性,这是地球化学数据中的一个明显遗漏。本研究的重点将是研究的区域和时间的变化,挥发性成分和地球化学特征的始新世-最近的玄武岩和相关的地幔捕虏体共同位于巴塔哥尼亚南部的地震阵列的微观结构。在这个地区的熔岩和捕虏体较小的熔体体积从当地缺乏稳定状态的岩浆房,经验相对较少的混合和分化,并提供了最好的机会,以确定地幔源的成分,岩性和挥发性成分。将这些地球化学和微观结构数据整合到以前资助的地震实验中,将能够更好地限制巴塔哥尼亚南部地幔的温度、成分、粘度和密度结构。该奖项反映了NSF的法定使命,并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The Signature of Metasomatized Subcontinental Lithospheric Mantle in the Basaltic Magmatism of the Payenia Volcanic Province, Argentina
- DOI:10.1029/2021gc010071
- 发表时间:2022-01-01
- 期刊:
- 影响因子:3.5
- 作者:Chilson-Parks,Benjamin H.;Calabozo,Fernando M.;Frey,Frederick A.
- 通讯作者:Frey,Frederick A.
The volcanic evolution of the Meseta del Lago Buenos Aires, Patagonia: subduction to slab window volcanism
巴塔哥尼亚布宜诺斯艾利斯 Meseta del Lago 的火山演化:俯冲到板窗火山作用
- DOI:
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:I Guest, AE Saal
- 通讯作者:I Guest, AE Saal
Evidence of South American lithosphere mantle beneath the Chile mid-ocean ridge
- DOI:10.1016/j.epsl.2023.118320
- 发表时间:2023-10
- 期刊:
- 影响因子:5.3
- 作者:S. Mallick;Sophie E. Kuhl;A. Saal;E. Klein;W. Bach;B. Monteleone;J. Boesenberg
- 通讯作者:S. Mallick;Sophie E. Kuhl;A. Saal;E. Klein;W. Bach;B. Monteleone;J. Boesenberg
Olivine-Hosted Melt Inclusions from the Andean Back Arc (34º-38ºS)
来自安第斯山后弧(南纬 34°-38°)的橄榄石熔融包裹体
- DOI:
- 发表时间:2019
- 期刊:
- 影响因子:0
- 作者:Chilson-Parks, B. H.
- 通讯作者:Chilson-Parks, B. H.
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Alberto Saal其他文献
Alberto Saal的其他文献
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{{ truncateString('Alberto Saal', 18)}}的其他基金
The transition from normal subduction to slab window, unraveling its effect on the subcontinental lithospheric mantle of southern Patagonia
从正常俯冲到板片窗口的转变,揭示了其对巴塔哥尼亚南部次大陆岩石圈地幔的影响
- 批准号:
2242269 - 财政年份:2023
- 资助金额:
$ 31.16万 - 项目类别:
Standard Grant
The Transition from Back Arc to Slab Window to Continental Rifting, Evidence from the Subcontinental Lithospheric Mantle of West Antarctica
从弧后到板窗再到大陆裂谷的转变,来自西南极洲次大陆岩石圈地幔的证据
- 批准号:
2139709 - 财政年份:2022
- 资助金额:
$ 31.16万 - 项目类别:
Standard Grant
The Volatile Contents of the Chile Ridge Mid-Ocean Ridge Basalts, Unraveling their Arc Signature
智利海脊大洋中脊玄武岩的挥发性成分,揭示了它们的弧特征
- 批准号:
1657659 - 财政年份:2017
- 资助金额:
$ 31.16万 - 项目类别:
Standard Grant
Magmatic Volatiles, Unraveling the Reservoirs and Processes of the Volcanism in the Antarctic Peninsula
岩浆挥发物,揭示南极半岛火山活动的储层和过程
- 批准号:
1643494 - 财政年份:2017
- 资助金额:
$ 31.16万 - 项目类别:
Standard Grant
Sr, Nd, Pb and Hf isotopes of basalts from the Quebrada/Discovery/Gofar transform fault system;key to test models of melt generation,transport and focusing beneath mid-ocean ridges
克布拉达/发现/戈法尔转换断层系统玄武岩的 Sr、Nd、Pb 和 Hf 同位素;测试大洋中脊下熔体生成、传输和聚焦模型的关键
- 批准号:
1355932 - 财政年份:2014
- 资助金额:
$ 31.16万 - 项目类别:
Standard Grant
Collaborative Research: The Volatile Contents of Seamount and Intra-Transform Lavas from the EPR: Deconstructing the Aggregation Process in MORB
合作研究:来自 EPR 的海山和内部转换熔岩的挥发性成分:解构 MORB 中的聚集过程
- 批准号:
0962195 - 财政年份:2010
- 资助金额:
$ 31.16万 - 项目类别:
Standard Grant
MRI: Acquisition of a Multi-Collector Inductively-Coupled Mass Spectrometer
MRI:获取多收集器电感耦合质谱仪
- 批准号:
0923281 - 财政年份:2009
- 资助金额:
$ 31.16万 - 项目类别:
Standard Grant
Collaborative Research: The Geodynamics of the Andean Southern Volcanic Zone, A Geochemical Approach
合作研究:安第斯山脉南部火山带的地球动力学,地球化学方法
- 批准号:
0810191 - 财政年份:2008
- 资助金额:
$ 31.16万 - 项目类别:
Continuing Grant
The Galapagos Plume Geodynamics, a Geochemical Approach
加拉帕戈斯羽流地球动力学,一种地球化学方法
- 批准号:
0403107 - 财政年份:2003
- 资助金额:
$ 31.16万 - 项目类别:
Standard Grant
相似海外基金
The transition from normal subduction to slab window, unraveling its effect on the subcontinental lithospheric mantle of southern Patagonia
从正常俯冲到板片窗口的转变,揭示了其对巴塔哥尼亚南部次大陆岩石圈地幔的影响
- 批准号:
2242269 - 财政年份:2023
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Ecological Change in a Mammalian Community in Extreme Southern Patagonia
巴塔哥尼亚最南端哺乳动物群落的生态变化
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2203690 - 财政年份:2021
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Slope-failure mechanisms, catastrophic mass flow processes and public perception of risk in British Columbia and Southern Patagonia.
不列颠哥伦比亚省和南巴塔哥尼亚的斜坡失稳机制、灾难性质量流过程以及公众对风险的认知。
- 批准号:
NE/T014210/1 - 财政年份:2020
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$ 31.16万 - 项目类别:
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Controls on the causes, dynamics and impacts of the catastrophic mass flows (aluviónes), northern Patagonia, Chile.
对智利巴塔哥尼亚北部灾难性物质流 (aluvión) 的原因、动态和影响的控制。
- 批准号:
2287167 - 财政年份:2019
- 资助金额:
$ 31.16万 - 项目类别:
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Gravimetric determination of the solid-earth response to ice-mass changes in southern Patagonia
巴塔哥尼亚南部固体地球对冰块变化响应的重力测定
- 批准号:
426109121 - 财政年份:2019
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Shortening, extension, and drainage reorganization in the Andean fold-thrust belt and broken foreland basin of northern Patagonia, Argentina
阿根廷巴塔哥尼亚北部安第斯褶皱冲断带和破碎前陆盆地的缩短、延伸和排水重组
- 批准号:
1918541 - 财政年份:2019
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Ecological Change in a Mammalian Community in Extreme Southern Patagonia
巴塔哥尼亚最南端哺乳动物群落的生态变化
- 批准号:
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- 资助金额:
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- 批准号:
1714662 - 财政年份:2017
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Global Eustasy or Tectonic Subsidence? Investigating Controls on Basin Evolution During Cenozoic Plate Reorganization, Magallanes Basin, Patagonia
全球稳定还是构造沉降?
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