Testing Models of Magma Generation in Warm-slab Subduction Zones: A Case Study of Volatiles in the Cascade Arc
暖板俯冲带岩浆生成模型测试:以喀斯喀特弧挥发物为例
基本信息
- 批准号:1119224
- 负责人:
- 金额:$ 29.53万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2011
- 资助国家:美国
- 起止时间:2011-07-01 至 2015-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The goal of this project is to better understand how magma is produced inside the Earth beneath the volcanoes in the Cascade mountains of Washington, Oregon, and northern California. Volcanism in this region is caused by the process of subduction, in which oceanic crust offshore of the Pacific northwest sinks back into the Earth?s mantle along the continental margin. Subduction is also responsible for the very large earthquakes that can occur in this region. As the sinking plate heats up, it releases H2O and other ?volatile? elements (Cl, S, F, C), which in turn cause the overlying mantle rocks to melt, producing magma that feeds the Cascade volcanoes. While the process of subduction occurs in many regions around the world (e.g., the Andes), a distinctive feature of the Cascades system is that the subducted oceanic crust is geologically young when it starts to subduct. This causes the crust to be hotter and should result in release of H2O and other volatiles when the subducted crust is still quite shallow, before it lies beneath the volcanoes. The main challenge, then, is to understand what role H2O and other volatiles play in creating magma beneath the Cascade volcanoes, and if volatiles are important, how they move from the subducted oceanic crust back into the mantle to produce magma.This project will test some fundamental ideas about volatile recycling and magma generation in ?warm-slab? subduction zones such as the Cascades arc. The project will involve new measurements of H2O, other volatiles, fluid mobile elements, and stable and radiogenic isotope tracers in primitive Cascade magmas. Many of the measurements will be done on melt inclusions, which are small blobs of silicate melt trapped inside of growing phenocrysts at depth. Such inclusions are not affected by low pressure degassing as magma moves towards the Earth?s surface, and thus provide a record of the pre-eruptive dissolved volatile contents in magma. The data obtained in this project will provide new information on mantle and slab temperatures, magma production processes, and the sources of volatiles beneath the Cascades arc. This project involves collaborations with other scientists in the U.S., Canada, and Japan for some of the specialized chemical analyses that will be done. Another collaborative effort will involve geodynamic modeling of mantle wedge flow patterns beneath the Cascades so the new geochemical data can be integrated with geophysical results.
这个项目的目标是更好地了解岩浆是如何在地球内部产生的火山下面的喀斯喀特山脉的华盛顿,俄勒冈州和北方加州。 这一地区的火山活动是由俯冲过程引起的,在俯冲过程中,太平洋西北部近海的海洋地壳沉入地球。地幔沿着大陆边缘。 俯冲作用也是该地区可能发生的特大地震的原因。 当下沉的板块升温时,它释放出H2O和其他?挥发性?元素(Cl,S,F,C),这反过来又导致上覆的地幔岩石熔化,产生岩浆,为喀斯喀特火山提供燃料。 虽然俯冲过程发生在世界各地的许多地区(例如,安第斯山脉),喀斯喀特系统的一个显着特征是俯冲洋壳在开始俯冲时在地质上还很年轻。 这导致地壳变得更热,当俯冲地壳仍然很浅时,在它位于火山下面之前,应该会释放出H2O和其他挥发物。 主要的挑战,那么,是要了解什么样的作用H2O和其他挥发性物质在创造下面的喀斯喀特火山岩浆,如果挥发性物质是重要的,他们如何从俯冲洋壳回到地幔产生岩浆。暖板俯冲带,如瀑布弧。该项目将涉及对原始喀斯喀特岩浆中的H2O、其他挥发物、流体移动的元素以及稳定和放射性同位素示踪剂进行新的测量。许多测量将在熔融包裹体上进行,熔融包裹体是被困在深度生长的斑晶内的硅酸盐熔体的小斑点。 当岩浆向地球移动时,这种包裹体不受低压脱气的影响?的表面,从而提供了一个记录的喷发前溶解的挥发分含量的岩浆。 在这个项目中获得的数据将提供新的信息,地幔和板片温度,岩浆生产过程,以及在瀑布弧下的挥发物的来源。该项目涉及与美国其他科学家的合作,加拿大和日本进行一些专门的化学分析。 另一项合作工作将涉及对瀑布下的地幔楔流模式进行地球动力学建模,以便将新的地球化学数据与地球物理结果相结合。
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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Paul Wallace其他文献
思考を深めるための動機づけとは
是什么促使您深化思考?
- DOI:
- 发表时间:
2014 - 期刊:
- 影响因子:0
- 作者:
Kazuhiro Ohtani;Paul Wallace;Yosuke Yamaguchi;Machiko Sannomiya;久坂哲也,三宮真智子;三宮真智子 - 通讯作者:
三宮真智子
A randomized controlled non-inferiority trial of primary care-based facilitated access to an alcohol reduction website (EFAR-FVG): preliminary results
- DOI:
10.1186/1940-0640-10-s2-o29 - 发表时间:
2015-09-24 - 期刊:
- 影响因子:3.200
- 作者:
Pierluigi Struzzo;Roberto Della Vedova;Donatella Ferrante;Nicholas Freemantle;Charilaos Lygidakis;Francesco Marcatto;Emanuele Scafato;Francesca Scafuri;Costanza Tersar;Paul Wallace - 通讯作者:
Paul Wallace
Erratum to: Key Intervention Characteristics in e-Health: Steps Towards Standardized Communication
- DOI:
10.1007/s12529-017-9658-z - 发表时间:
2017-07-06 - 期刊:
- 影响因子:1.700
- 作者:
Bridgette M. Bewick;Steven J. Ondersma;Mette T. Høybye;Oskar Blakstad;Matthijs Blankers;Håvar Brendryen;Pål F. Helland;Ayna B. Johansen;Paul Wallace;Kristina Sinadinovic;Christopher Sundström;Anne H Berman - 通讯作者:
Anne H Berman
A pilot study of sexual lifestyle in a random sample of the population of Great Britain.
对英国人口的随机样本进行的性生活方式试点研究。
- DOI:
- 发表时间:
1989 - 期刊:
- 影响因子:0
- 作者:
Anne M Johnson;Jane Wadsworth;Paul Elliott;Linda Prior;Paul Wallace;Sally Blower;Norman L. Webb;Gordon I. Heald;David L. Miller;Michael W. Adler;Roy M. Anderson - 通讯作者:
Roy M. Anderson
Physician Involvement in Disease Management as Part of the CCM
作为 CCM 一部分的医生参与疾病管理
- DOI:
- 发表时间:
2005 - 期刊:
- 影响因子:0
- 作者:
Paul Wallace - 通讯作者:
Paul Wallace
Paul Wallace的其他文献
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{{ truncateString('Paul Wallace', 18)}}的其他基金
Collaborative Research: Volatile sources, eruption triggers, and magma ascent rates for mafic alkaline magmas at Nyiragongo and Nyamulagira volcanoes, DR Congo, East African Rift
合作研究:刚果民主共和国、东非大裂谷尼拉贡戈火山和尼亚穆拉吉拉火山的镁铁质碱性岩浆的挥发性来源、喷发触发因素和岩浆上升速率
- 批准号:
2043066 - 财政年份:2021
- 资助金额:
$ 29.53万 - 项目类别:
Standard Grant
Collaborative Research: Size, depth and longevity of magma reservoirs under Kilauea's rift zones: Integrating melt inclusion data and thermal modeling
合作研究:基拉韦厄裂谷带下岩浆储层的大小、深度和寿命:整合熔体包裹体数据和热模拟
- 批准号:
2020049 - 财政年份:2020
- 资助金额:
$ 29.53万 - 项目类别:
Standard Grant
Collaborative Research: Measurement of Copper Speciation in Basaltic Glasses using X-ray Absorption Spectroscopy, a New Window on Metal Solubility and Transport in Magmatic Systems
合作研究:使用 X 射线吸收光谱测量玄武岩玻璃中的铜形态,这是岩浆系统中金属溶解度和传输的新窗口
- 批准号:
1834959 - 财政年份:2019
- 资助金额:
$ 29.53万 - 项目类别:
Standard Grant
Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion
合作研究:利用橄榄石熔体包裹体的扩散水损失确定南极洲埃里伯斯火山省的岩浆储存深度和上升速率
- 批准号:
1644027 - 财政年份:2017
- 资助金额:
$ 29.53万 - 项目类别:
Standard Grant
Volatile Clues to the Initial Controls on Large Explosive Volcanic Eruptions
大规模火山喷发初步控制的不稳定线索
- 批准号:
1524824 - 财政年份:2015
- 资助金额:
$ 29.53万 - 项目类别:
Standard Grant
Experimental Investigation of Magma Generation in Subduction Zones: Hydrous Liquidus Phase Relations of Primitive Magmas from the Trans-Mexican Volcanic Belt
俯冲带岩浆生成的实验研究:跨墨西哥火山带原始岩浆的含水液相相关系
- 批准号:
0739065 - 财政年份:2008
- 资助金额:
$ 29.53万 - 项目类别:
Continuing Grant
DYD-RCT: On-line randomised controlled trial of an interactive web-based intervention for reducing alcohol consumption
DYD-RCT:减少饮酒的交互式网络干预的在线随机对照试验
- 批准号:
G0501298/1 - 财政年份:2006
- 资助金额:
$ 29.53万 - 项目类别:
Research Grant
Collaborative Research: Volatile Recycling and Magma Genesis in a Hot, Dry Subduction Zone: A Case Study of the Cascade Arc
合作研究:干热俯冲带的挥发物回收和岩浆成因:喀斯喀特弧的案例研究
- 批准号:
0440394 - 财政年份:2005
- 资助金额:
$ 29.53万 - 项目类别:
Continuing Grant
Acquisition of a New Electron Microprobe
获得新的电子显微探针
- 批准号:
0345908 - 财政年份:2004
- 资助金额:
$ 29.53万 - 项目类别:
Standard Grant
Collaborative Research: Phenocrysts and Bubbles in the Bishop Tuff Rhyolitic Magma
合作研究:主教凝灰岩流纹质岩浆中的斑晶和气泡
- 批准号:
0408615 - 财政年份:2004
- 资助金额:
$ 29.53万 - 项目类别:
Standard Grant
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