High-resolution Imaging of the Mantle Transition Zone using EarthScope USArray

使用 EarthScope USArray 对地幔过渡带进行高分辨率成像

基本信息

项目摘要

The dominant tectonic process responsible for earthquakes, volcanoes and landform evolution in the continental United States in the past 200 million years has been the subduction of the Farallon plate beneath the North American Plate. Understanding this subduction process has been a challenge as most of the Farallon plate is now several hundred kilometers below the surface. This research takes advantage of a new technique to analyze seismic data and a rich data set collected by EarthScope USArray stations to image the subducted Farallon slab beneath the continental United States, a process similar to the imaging in medical CT Scan. This research aims to advance understanding of the subduction process with focuses on the following questions: (1) How does the older and deeper subducted Farallon plate connect with the younger plate now subducting beneath the Pacific Northwest? (2) What is the relation between the subduction of Farallon plate and the formation of the Yellowstone volcanic track? (3) How does the subducted Farallon plate interact with the deeper mantle across the US continent? High-resolution images of the Farallon slab, seismic measurements as well as computer codes based on the new seismic theory will be made available to the broader Geosciences community. Hands-on course projects and labs based on this research will be developed and implemented in undergraduate teaching. Slab anomalies have been imaged in wavespeed models in a broad region in North America mantle transition zone, extending from the west coast to the eastern US. The resolutions of wavespeed models are limited in the mantle transition zone due to data sensitivity and the subduction process in the mid mantle remains unclear. The second unresolved question is the role of a deep mantle plume in the formation of the Yellowstone hotspot track. In this research, we will compute finite-frequency sensitivities for waves generated at the 410-km and 660-km discontinuities to image high-resolution mantle transition zone structure beneath the continental US using seismic data recorded at USArray TA stations. The high-resolution models will provide new insights into the dynamics of subduction, especially the relation between subducted materials in the western and eastern US and the role of slab fragmentation in the formation of the Yellowstone hot-spot track. This research will provide a solid foundation for future imaging of mantle transition zone discontinuities and allow the community to take full advantage of frequency-dependent seismic data to tackle scientific questions on mantle convection dynamics.
在过去的2亿年里,美国大陆的地震、火山和地貌演变的主要构造过程是法拉隆板块向北美板块之下的俯冲。理解这个俯冲过程一直是一个挑战,因为法拉隆板块的大部分现在都在地表以下几百公里。这项研究利用一种新技术来分析地震数据和EarthScope USAray站收集的丰富数据集,对美国大陆下方的俯冲Farallon板进行成像,这一过程类似于医学CT扫描中的成像。本研究的目的是促进对俯冲过程的理解,重点是以下问题:(1)较老和较深的俯冲法拉隆板块如何与现在俯冲到太平洋西北下方的年轻板块连接?(2)法拉隆板块的俯冲与黄石火山轨迹的形成有什么关系?(3)俯冲的法拉隆板块如何与美国大陆更深的地幔相互作用?法拉隆板块的高分辨率图像、地震测量以及基于新地震理论的计算机代码将提供给更广泛的地球科学界。基于本研究的实践课程项目和实验室将在本科教学中开发和实施。 在北美地幔过渡带的一个广阔区域,从西海岸延伸到美国东部,板状异常已被成像在波速模型中。由于数据的敏感性,波速模型在地幔过渡带的分辨率有限,中地幔的俯冲过程仍不清楚。第二个尚未解决的问题是深地幔柱在黄石公园热点轨迹形成中的作用。在这项研究中,我们将计算在410公里和660公里的不连续面产生的波的有限频率灵敏度,使用USAray TA台站记录的地震数据来成像美国大陆下方的高分辨率地幔过渡带结构。高分辨率模型将为俯冲动力学提供新的见解,特别是美国西部和东部俯冲物质之间的关系以及板块破碎在黄石热点轨道形成中的作用。这项研究将为今后地幔过渡带不连续性的成像提供坚实的基础,并使社区能够充分利用频率相关的地震数据来解决地幔对流动力学的科学问题。

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)
Model Misfit Minimization
Stagnant slabs and their return flows from finite-frequency tomography of the 410-km and 660-km discontinuities
410 公里和 660 公里间断面的有限频率层析成像显示的停滞板片及其回流
Anomalous mantle transition zone beneath the Yellowstone hotspot track
  • DOI:
    10.1038/s41561-018-0126-4
  • 发表时间:
    2018-06
  • 期刊:
  • 影响因子:
    18.3
  • 作者:
    Ying Zhou
  • 通讯作者:
    Ying Zhou
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Ying Zhou其他文献

Activating Innate Immunity by a STING Signal Amplifier for Local and Systemic Immunotherapy
通过 STING 信号放大器激活先天免疫,进行局部和全身免疫治疗
  • DOI:
    10.1021/acsnano.2c03509
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    17.1
  • 作者:
    Wen Song;Shu-Jun Song;Jing Kuang;Hang Yang;Tao Yu;Fan Yang;Tao Wan;Yi Xu;Si-Tian Wei;Mu-Xuan Li;Yuan Xiong;Ying Zhou;Wen-Xiu Qiu
  • 通讯作者:
    Wen-Xiu Qiu
Genetic Mutations and Their Clinical Implications in Older Patients with Acute Myeloid Leukemia
老年急性髓系白血病患者的基因突变及其临床意义
  • DOI:
    10.31487/j.cor.2020.09.02
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    4.6
  • 作者:
    Xiaohong Xu;Shushu Yuan;Pengcheng Xu;Zhirong Cong;Li Zhu;Q. Jiang;Ying Zhou;Qianhui Shen;Bingzong Li
  • 通讯作者:
    Bingzong Li
The function of the hippocampus and middle temporal gyrus in forming new associations and concepts during the processing of novelty and usefulness features in creative designs
海马体和颞中回在处理创意设计中的新颖性和实用性特征时形成新的联想和概念的功能
  • DOI:
    10.1016/j.neuroimage.2020.116751
  • 发表时间:
    2020-03
  • 期刊:
  • 影响因子:
    5.7
  • 作者:
    Jingyuan Ren;Furong Huang;Ying Zhou;Liping Zhuang;Jiahua Xu;Chuanji Gao;Shaozheng Qin;Jing Luo
  • 通讯作者:
    Jing Luo
Induced abortion and breast cancer: results from a population-based case control study in China.
人工流产和乳腺癌:中国一项基于人群的病例对照研究的结果。
Structural, vibrational and electrical properties of type-II Dirac semimetal PtSe2 under high pressure
高压下狄拉克 II 型半金属 PtSe2 的结构、振动和电学特性
  • DOI:
    10.1088/1361-648x/ab315e
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Chao An;Xuliang Chen;Yonghui Zhou;Ying Zhou;Bowen Zhang;Chunhua Chen;Yifang Yuan;Ranran Zhang;Lili Zhang;Xiangde Zhu;Zhaorong Yang
  • 通讯作者:
    Zhaorong Yang

Ying Zhou的其他文献

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{{ truncateString('Ying Zhou', 18)}}的其他基金

Finite-frequency Imaging of the Mantle Transition Zone Discontinuities
地幔过渡区不连续性的有限频率成像
  • 批准号:
    2017218
  • 财政年份:
    2020
  • 资助金额:
    $ 18.41万
  • 项目类别:
    Standard Grant
Investigating tomographic resolution in global crustal imaging
研究全球地壳成像中的层析分辨率
  • 批准号:
    1348131
  • 财政年份:
    2015
  • 资助金额:
    $ 18.41万
  • 项目类别:
    Standard Grant
CSEDI: Testing Resolution of Deep Earth Seismic Structure Under the Pacific Using Geodynamic Models
CSEDI:利用地球动力学模型测试太平洋下地球深部地震结构的分辨率
  • 批准号:
    0968965
  • 财政年份:
    2010
  • 资助金额:
    $ 18.41万
  • 项目类别:
    Standard Grant
Mapping elastic and anelastic structure in the global upper mantle
绘制全球上地幔的弹性和非弹性结构图
  • 批准号:
    1013617
  • 财政年份:
    2010
  • 资助金额:
    $ 18.41万
  • 项目类别:
    Standard Grant
Mapping seismic anisotropy in the mantle transition zone
绘制地幔过渡带的地震各向异性图
  • 批准号:
    0809464
  • 财政年份:
    2008
  • 资助金额:
    $ 18.41万
  • 项目类别:
    Standard Grant

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非小细胞肺癌Biomarker的Imaging MS研究新方法
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Collaborative Research: High Resolution Imaging of Deep Mantle Structure and Dynamics Using USArray Data
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High Resolution Imaging of Mantle Discontinuities across South America at 20 Degrees South
南美洲南纬 20 度处地幔不连续性的高分辨率成像
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