Collaborative Research: Imaging the Upper Mantle Beneath the Western Tibetan Plateau
合作研究:对青藏高原西部下方的上地幔进行成像
基本信息
- 批准号:0439976
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2005
- 资助国家:美国
- 起止时间:2005-06-01 至 2012-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Tibet is key to understanding the large-scale dynamics of continental collisions, yet a substantial part of the mantle beneath Tibet has been probed only with relatively low-resolution techniques. We know enough to say that on average seismic wavespeeds in the vast western part of the plateau are unusually high, but we lack sufficient information to discriminate among a large number of plausible scenarios for what is causing these anomalies and what role they might play in the dynamics of mountain building. For example, are these high wavespeed (i.e., relatively cold) masses indigenous to the Tibetan lithosphere, sinking beneath the plateau and drawing adjacent mantle material into it, or do they represent the leading edge a subducting Indian plate that provides a distant push from the side? The primary objective of this project is to map the distribution of these high wavespeed masses in the upper mantle beneath Tibet in order to distinguish among these competing hypotheses. This mapping will be done by analyzing a seismological dataset gathered by deploying a multi-stage, quasi-linear array of broadband stations across the western plateau that combines long period (2-3 year) recording of lower frequency arrivals with shorter period (1 year) staged recording of higher frequency arrivals. A combination of traditional and recently developed techniques, based mostly on variations of arrival time tomography and receiver function analysis, will be used in the processing. This project will be carried out by 3 PIs and 2 or more graduate and undergraduate students in the US in collaboration with a substantial number of coworkers (scientists, technicians, students) from China, mostly from the Chinese Seismology Bureau in Beijing but also from the Tibetan Bureau of Seismology in Lhasa. Additionally, colleagues from the National Geophysical Research Institute in Hyderabad will extend our coverage across the border by carrying out a simultaneous deployment in India.
西藏是了解大陆碰撞大规模动力学的关键,但西藏地幔的很大一部分仅用相对低分辨率的技术进行了探测。 我们知道的足够多,可以说高原西部广大地区的平均地震波速异常高,但我们缺乏足够的信息来区分大量可能的情况,以了解导致这些异常的原因以及它们可能在其中发挥的作用。动态的山地建筑。 例如,这些高波速(即,相对较冷的)块体,下沉到高原之下,并将邻近的地幔物质吸入其中,还是它们代表了俯冲的印度板块的前缘,从侧面提供了一个遥远的推动力?这个项目的主要目标是绘制这些高波速物质在西藏下地幔中的分布图,以区分这些相互竞争的假说。 将通过分析地震数据集来完成这一绘图,地震数据集是通过在西部高原部署宽带台站的多级准线性阵列来收集的,该阵列将低频到达的长周期(2-3年)记录与高频到达的短周期(1年)分段记录相结合。在处理中将使用主要基于到达时间层析成像和接收器功能分析的传统技术和最近开发的技术的组合。该项目将由3名PI和2名或更多的研究生和本科生在美国与来自中国的大量同事(科学家,技术人员,学生)合作进行,主要来自北京的中国地震局,也来自拉萨的西藏地震局。 此外,海得拉巴国家地球物理研究所的同事将通过在印度进行同步部署来扩大我们的覆盖范围。
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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Steven Roecker其他文献
Anomalous intraslab structure revealed by the analysis of aftershocks of the Msubw/sub 6.7 Coquimbo-La Serena earthquake of 20 January 2019
2019 年 1 月 20 日 Mw6.7 科金博-拉塞雷纳地震余震分析揭示的板内异常结构
- DOI:
10.1016/j.tecto.2022.229660 - 发表时间:
2023-01-05 - 期刊:
- 影响因子:2.600
- 作者:
Diana Comte;Marcelo Farías;Daniela Calle-Gardella;Andrea Navarro-Aranguiz;Steven Roecker;Andreas Rietbrock - 通讯作者:
Andreas Rietbrock
Anomalous intraslab structure revealed by the analysis of aftershocks of the M<sub>w</sub> 6.7 Coquimbo-La Serena earthquake of 20 January 2019
- DOI:
10.1016/j.tecto.2022.229660 - 发表时间:
2023-01-05 - 期刊:
- 影响因子:
- 作者:
Diana Comte;Marcelo Farías;Daniela Calle-Gardella;Andrea Navarro-Aranguiz;Steven Roecker;Andreas Rietbrock - 通讯作者:
Andreas Rietbrock
Steven Roecker的其他文献
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{{ truncateString('Steven Roecker', 18)}}的其他基金
Collaborative Research: Active and Passive Seismic Imaging of the Three-Dimensional Structure and Magma System beneath the Summit of Kilauea Volcano
合作研究:基拉韦厄火山顶下三维结构和岩浆系统的主动和被动地震成像
- 批准号:
2218646 - 财政年份:2023
- 资助金额:
-- - 项目类别:
Standard Grant
Investigation of Anomalous Travel Times in the Central Andes: Possible Evidence for a Lithospheric Root Trapped Above a Flat Slab
安第斯山脉中部异常旅行时间的调查:岩石圈根部被困在平板上方的可能证据
- 批准号:
2027496 - 财政年份:2021
- 资助金额:
-- - 项目类别:
Continuing Grant
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合作研究:跨安第斯大造山运动(TANGO)
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2021040 - 财政年份:2020
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Standard Grant
Collaborative Research: Lithospheric foundering beneath the Sierra Nevada constrained by analysis of an anomalous Pn shadow zone
合作研究:异常 Pn 阴影区分析限制了内华达山脉下方的岩石圈沉没
- 批准号:
1547149 - 财政年份:2016
- 资助金额:
-- - 项目类别:
Standard Grant
Collaborative Research: Seismic characterization of microearthquakes and crustal velocity structure around the Whataroa fault zone drilling site, Alpine Fault, New Zealand
合作研究:新西兰高山断层瓦塔罗阿断层带钻探现场周围微地震和地壳速度结构的地震特征
- 批准号:
1114147 - 财政年份:2011
- 资助金额:
-- - 项目类别:
Standard Grant
Collaborative Research: Analysis of Seismicity Associated with the Mw=8.8 2010 Maule Earthquake and Implications for Subduction Processes
合作研究:2010 年马乌莱地震 Mw=8.8 相关地震活动分析及其对俯冲过程的影响
- 批准号:
1045633 - 财政年份:2011
- 资助金额:
-- - 项目类别:
Standard Grant
Collaborative Research: Testing the Role of Magma and Related Fluids in Early-Stage Rifting, East Africa
合作研究:测试岩浆和相关流体在东非早期裂谷中的作用
- 批准号:
1113346 - 财政年份:2011
- 资助金额:
-- - 项目类别:
Continuing Grant
Collaborative Research: TAIGER's Tale: Tectonics of Subduction to Collision
合作研究:TAIGER 的故事:俯冲到碰撞的构造
- 批准号:
1010580 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Standard Grant
Development of a Teleseismic Viscoelastic Waveform Tomography Algorithm with Application to Broadband Seismograms from the Tien Shan
开发应用于天山宽带地震图的远震粘弹性波形层析成像算法
- 批准号:
0838384 - 财政年份:2009
- 资助金额:
-- - 项目类别:
Continuing Grant
Development of New Features for the PyLith Finite Element Code to Enable Innovative Research In Multiple Earthquake Cycle Simulations
开发 PyLith 有限元代码的新功能,以实现多地震周期模拟中的创新研究
- 批准号:
0745391 - 财政年份:2008
- 资助金额:
-- - 项目类别:
Continuing Grant
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