Accretion of the lower oceanic crust: Reconciling evidence of hydrothermal fluid fluxes with mineral cooling rates from ODP Hole 1256D, IODP Exp335
下洋壳的增生:ODP 孔 1256D、IODP Exp335 的热液流体通量与矿物冷却速率的证据相一致
基本信息
- 批准号:NE/L000059/1
- 负责人:
- 金额:$ 4.61万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2014
- 资助国家:英国
- 起止时间:2014 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Ocean crust covers ~ two thirds of the Earth's surface and is constantly recycled through the plate tectonic cycle. New ocean crust is created along mid ocean ridges, a submarine chain of volcanoes that exist at the boundaries between two tectonic plates, and will eventually be returned to the mantle at subduction zones. Much of the ocean crust produced today is forming at fast spreading ridges, where the two tectonic plates are moving away from each other at rates >80 mm/yr. Ocean crust formed at these fast spreading ridges has a relatively simple stratigraphy. The upper crust, the top 1-2 km of ocean crust (total thickness ~ 6-7km), is composed of erupted lava flows that overlie intrusive feeder dikes. The lower crust (~5 km thick) is made up of plutonic rocks called gabbros that represent crystallised magma chambers. The magmatic processes that generate the lower crust (~5 km thick) are not well understood primarily due to the sparse sampling of the lower crust. From studies of ophiolites, pieces of the ocean crust that are now emplaced on the continents, two end member models for the accretion of the lower crust have been proposed, the "gabbro glacier" and "sheeted sills" models. They primarily differ in the location of melt intrusion and crystallisation. The removal of the heat within the melt has to be effectively achieved within a few kilometres of the ridge axis, and places strict thermal constraints on the feasibility of the accretion models. Heat from the lower crust can be extracted by conduction into the surrounding rock and by heating seawater-derived hydrothermal fluids that percolate into the crust and convect heat away to the seafloor. The hydrothermal fluids are recorded in the igneous rocks by fluid-rock chemical reactions that create new secondary minerals. These minerals are present both replacing primary igneous minerals and filling fractures to form hydrothermal veins. The thermal feasibility of the two accretion models is intimately linked to the magnitude and distribution of hydrothermal fluids in the ocean crust, with the multiple sills model requiring extensive hydrothermal cooling in the lower crust. Samples recovered from an intact section of the lower crust will provide opportunity to test these models. The interface between the upper and lower crust is the principal boundary over which magmatic heat from lower crust is transferred to the convecting hydrothermal fluids in the upper crust, and is called the conductive boundary layer. A complete section of upper ocean crust and the upper/lower crust transition has only been sampled once in modern ocean crust, in ODP/IODP Hole 1256D by the Ocean Drilling Program and Integrated Ocean Drilling Program and required ~6 months of continuous drilling to reach this boundary. In this borehole, the complex interplay of magmatism and hydrothermal processes are recorded in the igneous rocks recovered. In this study, the magnitude of hydrothermal fluid fluxes in the conductive boundary layer will be calculated using geochemical tracers of fluid rock reaction. Sr isotope are ideal for this task and have been used extensively and successfully in several studies. These results will then be combined into a thermal model that will use the magmatic observation from Hole 1256D as boundary conditions. The model will include magmatic intrusions into the conductive boundary layer and calculate the heat flux across the boundary and ultimately will be used to test accretion models.
海洋地壳覆盖了地球表面的三分之二,并在板块构造循环中不断循环。新的洋壳是沿着沿着大洋中脊形成的,这是一条海底火山链,存在于两个构造板块之间的边界上,最终将在俯冲带返回地幔。今天产生的大部分海洋地壳都是在快速扩张的海脊上形成的,在那里,两个构造板块以每年80毫米以上的速度相互远离。在这些快速扩张的海脊上形成的洋壳具有相对简单的地层。上地壳,即洋壳顶部1-2公里(总厚度约6- 7公里),由喷发的熔岩流组成,覆盖在侵入性的补给岩脉上。下地壳(约5公里厚)由称为辉长岩的深成岩石组成,辉长岩代表结晶岩浆房。产生下地壳(约5公里厚)的岩浆过程还没有得到很好的理解,主要是由于下地壳的采样稀疏。通过对蛇绿岩(现在侵位在大陆上的洋壳碎片)的研究,提出了两种下地壳增生的端元模型,即“辉长岩冰川”和“席状岩床”模型。它们的主要区别在于熔体侵入和结晶的位置。熔体内的热量的去除必须在脊轴的几公里内有效地实现,并对吸积模型的可行性提出了严格的热约束。来自下地壳的热量可以通过传导到周围的岩石中以及通过加热渗入地壳并将热量对流到海底的海水热液来提取。热液流体通过流体-岩石化学反应记录在火成岩中,产生新的次生矿物。这些矿物的存在既取代了原生火成岩矿物,也填充了裂缝,形成热液脉。这两种吸积模型的热可行性与洋壳中热液流体的规模和分布密切相关,多岩床模型要求下地壳中有广泛的热液冷却。从下地壳的完整部分回收的样品将为测试这些模型提供机会。上、下地壳之间的界面是下地壳岩浆热传递到上地壳对流热液的主要边界,称为传导边界层。在现代大洋地壳中,大洋钻探计划和综合大洋钻探计划仅在ODP/IODP 1256 D孔中对上大洋地壳和上/下地壳过渡区的完整剖面进行过一次采样,需要持续钻探约6个月才能到达该边界。在这个钻孔中,岩浆活动和热液过程的复杂相互作用记录在回收的火成岩中。在这项研究中,热液流体通量的大小在导电边界层将使用流体岩石反应的地球化学示踪剂计算。锶同位素是这一任务的理想选择,并已在几项研究中得到广泛和成功的应用。然后将这些结果组合成热模型,该模型将使用1256 D孔的岩浆观测作为边界条件。该模型将包括岩浆侵入传导边界层,并计算穿过边界的热通量,最终将用于测试吸积模型。
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Laser ablation MC-ICP-MS U/Pb geochronology of ocean basement calcium carbonate veins
海洋基底碳酸钙脉激光烧蚀 MC-ICP-MS U/Pb 年代学
- DOI:
- 发表时间:2014
- 期刊:
- 影响因子:0
- 作者:Harris, M.
- 通讯作者:Harris, M.
What Lies Beneath: The Formation and Evolution of Oceanic Lithosphere
下面是什么:海洋岩石圈的形成和演化
- DOI:10.5670/oceanog.2019.136
- 发表时间:2019
- 期刊:
- 影响因子:2.8
- 作者:Michibayashi K
- 通讯作者:Michibayashi K
Sulphide mineral evolution and metal mobility during alteration of the oceanic crust: Insights from ODP Hole 1256D
- DOI:10.1016/j.gca.2016.08.009
- 发表时间:2016-11
- 期刊:
- 影响因子:5
- 作者:C. Patten;I. Pitcairn;D. Teagle;M. Harris
- 通讯作者:C. Patten;I. Pitcairn;D. Teagle;M. Harris
Channelling of hydrothermal fluids during the accretion and evolution of the upper oceanic crust: Sr isotope evidence from ODP Hole 1256D
- DOI:10.1016/j.epsl.2015.01.042
- 发表时间:2015-04
- 期刊:
- 影响因子:5.3
- 作者:M. Harris;R. Coggon;C. Smith-Duque;M. Cooper;J. Milton;D. Teagle
- 通讯作者:M. Harris;R. Coggon;C. Smith-Duque;M. Cooper;J. Milton;D. Teagle
Hydrothermal cooling of the ocean crust: Insights from ODP Hole 1256D
- DOI:10.1016/j.epsl.2017.01.010
- 发表时间:2017-03-15
- 期刊:
- 影响因子:5.3
- 作者:Harris, Michelle;Coggon, Rosalind M.;Teagle, Damon A. H.
- 通讯作者:Teagle, Damon A. H.
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Damon Teagle其他文献
Strength profile at the CM sites, ICDP Oman Drilling Project
ICDP 阿曼钻探项目 CM 现场的强度概况
- DOI:
- 发表时间:
2018 - 期刊:
- 影响因子:0
- 作者:
Yasuhiro Yamada;Moe Kyaw;Adam Wspaniary;Natsue Abe;Katsuyoshi Michibayashi;Eiichi Takazawa;Juerg Matter;Damon Teagle;Peter Kelemen;The Oman Drilling Project Phase 2 Science Party - 通讯作者:
The Oman Drilling Project Phase 2 Science Party
Physical property of the fossilized crust-mantle transition zone from ICDP Oman Drilling Project Hole CM1A and CM2B measured onboard D/V Chikyu
在 D/V Chikyu 船上测量的 ICDP 阿曼钻探项目 CM1A 和 CM2B 孔化石壳幔过渡带的物理性质
- DOI:
- 发表时间:
2019 - 期刊:
- 影响因子:0
- 作者:
岡崎 啓史;阿部 なつ江;畠山 航平;赤松 祐哉;片山 郁夫;高澤 栄一;Damon Teagle;Peter Kelemen;Jude Coggon;Oman Drilling Prj Ph2 Sci. Party - 通讯作者:
Oman Drilling Prj Ph2 Sci. Party
分子雲での光化学反応による有機物の生成と原始惑星系円盤における進化
分子云中光化学反应产生有机物和原行星盘演化
- DOI:
- 发表时间:
2017 - 期刊:
- 影响因子:0
- 作者:
川本 竜彦;佐藤 宏樹;髙橋 藤馬;Juan Miguel Guotana;森下 知晃;Peter Kelemen;Jude Coggon;Michelle Harris;Juerg Matter;道林 克禎;高澤 栄一;Damon Teagle;The Oman Drilling Project Phase 1 Science Party;香内晃 - 通讯作者:
香内晃
Oman Drilling Project Phase 1 のリストヴェナイト中のドロマイト脈に薄い塩水からなる流体包有物があるぜよ
阿曼钻探项目一期的listvenite白云岩脉中存在由稀盐水构成的流体包裹体。
- DOI:
- 发表时间:
2019 - 期刊:
- 影响因子:0
- 作者:
川本 竜彦;佐藤 宏樹;髙橋 藤馬;Juan Miguel Guotana;森下 知晃;Peter Kelemen;Jude Coggon;Michelle Harris;Juerg Matter;道林 克禎;高澤 栄一;Damon Teagle;The Oman Drilling Project Phase 1 Science Party - 通讯作者:
The Oman Drilling Project Phase 1 Science Party
オマーンに産するリストベナイトの岩石学: 沈み込み帯の炭素循環の解明に向けて
阿曼利斯特韦尼特的岩石学:阐明俯冲带的碳循环
- DOI:
- 发表时间:
2019 - 期刊:
- 影响因子:0
- 作者:
髙橋 藤馬;森下 知晃;佐藤 宏樹; Guotana Juan;川本 竜彦;Peter Kelemen;Jude Coggon;Michelle Harris;Juerg Matter;道林 克禎;高澤 栄一;Damon Teagle;The Oman Drilling Project Phase 1 science Party - 通讯作者:
The Oman Drilling Project Phase 1 science Party
Damon Teagle的其他文献
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{{ truncateString('Damon Teagle', 18)}}的其他基金
Developing continuous volcano-stratigraphies across the South Atlantic Transect: NERC UK-IODP Moratorium support for Aled Evans - IODP Expedition 393
开发横跨南大西洋横断面的连续火山地层:NERC UK-IODP 暂停支持 Aled Evans - IODP Expedition 393
- 批准号:
NE/X00631X/1 - 财政年份:2022
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
UK-IODP Moratorium Co-Chief Support for Expedition 393: Quantifying the geochemical impacts of ocean crustal ageing.
UK-IODP 暂停第 393 次探险联合首席支持:量化海洋地壳老化的地球化学影响。
- 批准号:
NE/X009440/1 - 财政年份:2022
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
UK-IODP Moratorium Award for Lewis Grant - Shipboard Scientist Expedition 390: The role of ridge flank dolomitization in the ocean Mg budget
英国 IODP 暂停奖授予 Lewis Grant - 船上科学家第 390 次探险:山脊侧翼白云石化在海洋镁预算中的作用
- 批准号:
NE/X002446/1 - 财政年份:2022
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
Timescales of South Atlantic ridge flank hydrothermal exchange; UK-IODP Moratorium Award for Thomas Belgrano - Shipboard Scientist, Expedition 393.
南大西洋洋脊侧翼热液交换的时间尺度;
- 批准号:
NE/X003485/1 - 财政年份:2022
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
NSFGEO-NERC: Data Mining the Deep: Combining Geochemistry and Imaging Spectroscopy to Quantify Deep Hydrothermal Circulation at Mid-Ocean Ridges
NSFGEO-NERC:深海数据挖掘:结合地球化学和成像光谱学来量化大洋中脊的深部热液循环
- 批准号:
NE/W007517/1 - 财政年份:2021
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
Engaging UK Communities in Scientific Ocean Drilling: A proposal for Knowledge Exchange and Coordination for UK IODP
让英国社区参与科学海洋钻探:英国 IODP 知识交流和协调提案
- 批准号:
NE/T009527/1 - 财政年份:2019
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
Characterising devolatilisation beneath the Mariana Forearc
马里亚纳前弧下方的挥发分蒸发特征
- 批准号:
NE/P020909/1 - 财政年份:2016
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
IODP Phase 1 post cruise support for C Smith-Duque Expedition 344
IODP 第 1 阶段为 C Smith-Duque Expedition 344 提供巡航后支持
- 批准号:
NE/L014351/1 - 财政年份:2014
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
The timing and nature of inorganic calcium carbonate precipitation within exposed basalt from the South Pacific Gyre, IODP Expedition 329.
南太平洋环流暴露的玄武岩中无机碳酸钙沉淀的时间和性质,IODP 第 329 次探险。
- 批准号:
NE/L000024/1 - 财政年份:2013
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
Dating mineral formation during mid-ocean ridge flank hydrothermal circulation: Evidence from the Juan de Fuca Ridge, IODP Expedition 327
大洋中脊侧翼热液循环期间矿物形成的年代测定:来自胡安德富卡海脊的证据,IODP 327 号探险队
- 批准号:
NE/L000032/1 - 财政年份:2013
- 资助金额:
$ 4.61万 - 项目类别:
Research Grant
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Quantifying the thermal structure and hydrothermal fluid fluxes in the lower oceanic crust
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Quantifying the thermal structure and hydrothermal fluid fluxes in the lower oceanic crust
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Quantifying the thermal structure and hydrothermal fluid fluxes in the lower oceanic crust
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Determination of cooling rates of the lower oceanic crust on drilled rocks of the ICDP Oman Drilling Project.
确定 ICDP 阿曼钻探项目钻探岩石上的下洋地壳冷却速率。
- 批准号:
298787604 - 财政年份:2016
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$ 4.61万 - 项目类别:
Infrastructure Priority Programmes