Collaborative Research: Fluid-mobile element cycling (halogens, boron, lithium) through the forearc of Costa Rica

合作研究:通过哥斯达黎加弧前的流体移动元素循环(卤素、硼、锂)

基本信息

  • 批准号:
    1850711
  • 负责人:
  • 金额:
    $ 24.81万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2019
  • 资助国家:
    美国
  • 起止时间:
    2019-05-01 至 2023-04-30
  • 项目状态:
    已结题

项目摘要

A subduction zone is an area where two tectonic plates collide and the denser plate (the subducting slab, consisting of seafloor sediments, oceanic crust, and underlying mantle) sinks into the mantle beneath the more buoyant plate. Minerals in the slab containing water break down when exposed to the high temperatures encountered at depth beneath the seafloor, releasing fluids which ultimately lead to the production of magmas and explosive volcanism. In addition, these fluids are thought to influence the occurrence of earthquakes in the subduction zone. Fluids released by the subducting slab contain fluid mobile elements, such as lithium, chlorine and boron, and the composition of the fluids is diagnostic of the source in the subducting slab (sediments, oceanic crust, mantle) from which they derived. Cold and thermal springs located above the subducting slab provide a window into the fluids released at depth in a subduction zone. This project will investigate the geochemistry of spring fluids located off of Costa Rica between the subduction trench and the volcanoes produced by magmatism to identify the sources and amount of slab-derived fluids released at depth within a subduction zone. This information is necessary to understand volcano and earthquake behavior along active plate margins. This work will also provide scientific training for graduate and undergraduate students, as well as outreach presentations on subduction zones and associated hazards to the public in both the United States and Costa Rica.Subduction zones are crucial for understanding the chemistry deep and shallow reservoirs of Earth, yet very little is known about volatile behavior in forearc regimes. Here we propose to quantify the Li, B, and halogen budget throughout the inner subaerial forearc of Costa Rica through a geochemical investigation of forearc cold and thermal spring fluids. Lithium, boron, and the halogens (Cl, F, Br, I) are all highly fluid-mobile elements. Their incompatibility in minerals limits modification by fluid-rock interaction, thereby making them reliable tracers of fluid source. Costa Rica is an ideal locality for study because it is one of the few subduction zones in which forearc springs are subaerial due to the presence of several peninsulas and therefore easily accessible to sampling. Two of the peninsulas (Nicoya and Osa) are directly over the seismogenic zone and both are sites of large megathrust earthquakes. Slow slip events have also been observed in the Nicoya Peninsula. Elevated fluid pressures, commonly thought to be derived from metamorphic dehydration reactions, lower the effective stress and are therefore commonly invoked as a mechanism for aseismic slip. Fluids from forearc springs provide us with a direct window to fluid sources at seismogenic depths in subduction zones. Through the combined use of Li, B, and Cl stable isotopes, elemental concentrations, and elemental ratios (e.g., Br/Cl, I/Cl, B/Cl, Li/B), the following will be completed: 1) Identify the change(s) in slab-derived source along and across the forearc and how prograde metamorphism of the subducting slab controls Li, B, and halogen concentrations and isotope compositions across the forearc; 2) Provide an integrated view of loss of fluid-mobile elements during shallow subduction processes contributing to an improved evaluation of cycling through subduction zones; and 3) Evaluate correlation, or lack thereof, between varying fluid sources and seismic behavior.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.
俯冲带是两个构造板块碰撞的区域,密度较大的板块(俯冲板块,由海底沉积物、海洋地壳和下面的地幔组成)下沉到浮力较大的板块下面的地幔中。当暴露在海底深处的高温下时,含有水的板块中的矿物质会分解,释放出液体,最终导致岩浆和爆炸性火山活动的产生。此外,这些流体被认为影响了俯冲带地震的发生。俯冲板块释放的流体中含有锂、氯和硼等流体可动元素,其组成可诊断俯冲板块(沉积物、海洋地壳、地幔)的来源。位于俯冲板块上方的冷泉和温泉为了解俯冲带深处释放的流体提供了一个窗口。该项目将调查位于哥斯达黎加外海俯冲沟和岩浆活动产生的火山之间的泉水流体的地球化学,以确定在俯冲带深处释放的板块衍生流体的来源和数量。这些信息对于了解沿活动板块边缘的火山和地震行为是必要的。这项工作还将为研究生和本科生提供科学培训,并就美国和哥斯达黎加的俯冲带及其对公众的相关危害进行外联介绍。俯冲带对于了解地球深部和浅层储层的化学性质至关重要,但对弧前地区的挥发性行为知之甚少。在这里,我们建议通过对弧前冷泉和温泉流体的地球化学调查,量化哥斯达黎加整个内陆陆地前弧的Li、B和卤素收支。锂、硼和卤素(Cl、F、Br、I)都是高度流动的元素。它们在矿物中的不相容性限制了流体-岩石相互作用的修饰,从而使它们成为流体来源的可靠示踪剂。哥斯达黎加是一个理想的研究地点,因为它是为数不多的俯冲带之一,其中由于几个半岛的存在,弧前泉处于水下,因此很容易取样。其中两个半岛(尼科亚半岛和奥萨半岛)正位于发震带上方,都是大型逆冲地震的发生地。在尼科亚半岛也观察到慢滑事件。流体压力升高,通常被认为是由变质脱水反应引起的,降低了有效应力,因此通常被认为是地震滑动的机制。来自弧前弹簧的流体为我们提供了一个了解俯冲带发震深度流体来源的直接窗口。通过对Li、B和Cl稳定同位素、元素浓度和元素比值(如Br/Cl、I/Cl、B/Cl、Li/B)的综合利用,将完成以下工作:1)确定沿弧前和弧前的陆块源变化,以及俯冲陆块的进阶变质作用如何控制弧前的Li、B和卤素浓度和同位素组成;2)提供了浅层俯冲过程中流体可动元素损失的综合观点,有助于改进对俯冲带旋回的评价;3)评估不同流体源与地震行为之间的相关性或相关性缺失。该奖项反映了美国国家科学基金会的法定使命,并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,被认为值得支持。

项目成果

期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Li isotope ratios of spring fluids as an effective tracer of slab-derived subducted sources across the Costa Rica forearc
泉水的锂同位素比作为哥斯达黎加弧前板块衍生俯冲源的有效示踪剂
  • DOI:
    10.1130/g51277.1
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    5.8
  • 作者:
    Helper, Jacob P.;Barnes, Jaime D.;Maarten de Moor, J.;Rodríguez, Alejandro;Barry, Peter H.;Ramos, Evan J.;Lassiter, John C.
  • 通讯作者:
    Lassiter, John C.
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Jaime Barnes其他文献

Abstract 16780: Disease Severity Assessed by Thromboelastography in a Minority Population With COVID-19
摘要 16780:通过血栓弹力图评估少数 COVID-19 人群的疾病严重程度
  • DOI:
    10.1161/circ.142.suppl_3.16780
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    37.8
  • 作者:
    K. Bliden;A. Rout;R. Chaudhary;Jaime Barnes;U. Tantry;P. Gurbel
  • 通讯作者:
    P. Gurbel
Timing of Spontaneous Awakening and Breathing Trial Affects Duration of Mechanical Ventilation
  • DOI:
    10.1016/j.chest.2016.08.330
  • 发表时间:
    2016-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Galo Sanchez Palacios;Jennifer Quinn;Meredith Stein;Joseph Carrington;Kinjal Sheth;Paul Szczybor;Kate Curran;Jaime Barnes
  • 通讯作者:
    Jaime Barnes
A phonological expression for physical movement monitoring in body sensor networks
身体传感器网络中身体运动监测的语音表达
Assessing ICU Severity of Illness With Readily Available Administrative Data
  • DOI:
    10.1016/j.chest.2016.08.229
  • 发表时间:
    2016-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Joseph Carrington;Malini Fonseka Chandra Serharan;Galo Sanchez Palacios;Jaime Barnes
  • 通讯作者:
    Jaime Barnes

Jaime Barnes的其他文献

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{{ truncateString('Jaime Barnes', 18)}}的其他基金

Collaborative Research: Halogen and chlorine isotope behavior during metamorphism of metapelitic rocks
合作研究:变质岩变质作用过程中的卤素和氯同位素行为
  • 批准号:
    2321368
  • 财政年份:
    2023
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Standard Grant
Tracing Ancient Subduction in the Lithospheric Mantle via Traditional and Non-Traditional Stable Isotopes
通过传统和非传统稳定同位素追踪岩石圈地幔的古代俯冲作用
  • 批准号:
    2234385
  • 财政年份:
    2023
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Standard Grant
Collaborative Research: Halogen Behavior In the Pluton-To-Volcanic Arc System
合作研究:岩体到火山弧系统中的卤素行为
  • 批准号:
    2211242
  • 财政年份:
    2022
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Standard Grant
Collaborative Research: Rodingites as Recorders of Tectonic Processes from the Seafloor to Convergence: A case study of the Dun Mountain Ophiolite Belt
合作研究:罗丁岩作为从海底到聚合的构造过程的记录者:以敦山蛇绿岩带为例
  • 批准号:
    2147570
  • 财政年份:
    2022
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Standard Grant
Sequestration of Halogens in the Sub-continental Lithospheric Mantle: Implications for Global Element Cycling
次大陆岩石圈地幔中卤素的封存:对全球元素循环的影响
  • 批准号:
    1850749
  • 财政年份:
    2019
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Standard Grant
Retrograde Metamorphism in the Greek Cycladic Islands as a Window into Exhumation Mechanisms of High Pressure Terranes
希腊基克拉迪群岛的逆变质作用是了解高压地体折返机制的窗口
  • 批准号:
    1725110
  • 财政年份:
    2017
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Standard Grant
CAREER: Rheological Evolution of Subduction Interface Shear Zones: Insights From Exhumed Subduction Complexes
职业:俯冲界面剪切带的流变演化:来自挖掘出的俯冲复合体的见解
  • 批准号:
    1555346
  • 财政年份:
    2016
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Continuing Grant
Fluid-mobile and volatile element (Cl, B, and Li) cycling through the forearc: Case study of cold and thermal spring geochemistries from the Hikurangi accretionary prism, New Zeala
流体流动元素和挥发性元素(Cl、B 和 Li)在前弧循环:新西兰 Hikurangi 增生棱镜冷泉和温泉地球化学的案例研究
  • 批准号:
    1455432
  • 财政年份:
    2016
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Continuing Grant
Chlorine Isotope Geochemistry of Altered Oceanic Crust: Empirical and Experimental Observations
改变的洋壳的氯同位素地球化学:经验和实验观测
  • 批准号:
    0946686
  • 财政年份:
    2010
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Continuing Grant
Chlorine Isotope Geochemistry of Volcanic Systems
火山系统的氯同位素地球化学
  • 批准号:
    0711533
  • 财政年份:
    2007
  • 资助金额:
    $ 24.81万
  • 项目类别:
    Standard Grant

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协作研究:流体问题的保持精度的鲁棒时间步进方法
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