A Unified Crustal Motion Model for Continental East Asia
东亚大陆统一地壳运动模型
基本信息
- 批准号:1723284
- 负责人:
- 金额:$ 23.25万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-07-15 至 2020-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project aims to improve our knowledge of crustal motion in continental East Asia, where the Quaternary tectonics is arguably the most active and complex among global continental deformation zones. Regional GPS data observed in the past two decades from different networks will be analyzed to produce a unified crustal motion map that will be provided to the scientific community. The unified crustal motion model has a wide range of application, from tectonic deformation study, geodynamic modeling, to seismic hazard assessment. The project will also update a fault network model for fault slip estimation, which will be a significant improvement in methodology development for crustal deformation modeling. The resulting model will improve our understanding of how deformation is partitioned to faults of various sizes, and help address the outstanding controversy on deformation style of continental crust/lithosphere. The estimation of seismic moment accumulation rates on individual faults will help assess seismic hazard across the region, particularly along the Himalaya, Tien Shan, and Pamir-Hindu Kush orogens. A graduate student will be trained to process the geodetic data and conduct research on crustal deformation modeling. The project will also help strengthen international collaboration with Chinese scientists and establish new collaborations with Russian and Indian scientists. More than two decades of GPS observations have been gathered in continental East Asia by various regional geodetic networks, and their data were analyzed to infer deformation fields at various regional scales. These data were usually analyzed, however, using different versions of GPS data processing software and employing different geophysical models and parameters, in many cases resulting in significant errors and/or inconsistencies between solutions. This research will collect all the available campaign GPS data surveyed in continental East Asia, reprocess the data uniformly using the up-to-date software and orbital and geophysical models with consistent parameterization. Thus data processing errors within and between campaign solutions will be minimized, and a set of unified solutions for secular velocities and coseismic and postseismic displacements will be produced. This result will be combined with existing continuous GPS solutions, and the final product will help resolve detailed deformation patterns across multiple regions with improved solution accuracy, and provide better constraints for slip rates on faults. A "back-slip" algorithm will be implemented into the fault network model that the PI group has previously developed. Introduction of the algorithm, which is usually used for block motion models only, will overcome some of the deficiencies that other methods such as the block motion and dislocation fault segment methods have, and better simulate elastic strain buildup around individual faults, particularly for deformation fields around thrust/normal faults. The improved method and the code will be used to invert GPS velocity data for fault slip rates, and help characterize deformation sources, patterns, mechanisms, and earthquake potentials in continental East Asia.
本项目旨在提高我们对东亚大陆地壳运动的认识,东亚大陆第四纪构造可以说是全球大陆变形带中最活跃和最复杂的。将对过去二十年来从不同网络观测到的区域GPS数据进行分析,以生成统一的地壳运动图,并提供给科学界。统一的地壳运动模型在构造变形研究、地球动力学建模、地震危险性评价等方面有着广泛的应用。该项目还将更新断层滑动估计的断层网络模型,这将是地壳变形建模方法发展的重大改进。该模型将提高我们对形变如何划分为不同大小断层的认识,并有助于解决大陆地壳/岩石圈形变类型的突出争议。对单个断层地震矩积累率的估计将有助于评估整个地区的地震危险性,特别是沿喜马拉雅、天山和帕米尔高原-兴都库什造山带的地震危险性。培养一名研究生处理大地测量数据并进行地壳变形建模研究。该项目还将有助于加强与中国科学家的国际合作,并与俄罗斯和印度科学家建立新的合作关系。利用不同区域大地测量网收集了东亚大陆20多年的GPS观测资料,并对其数据进行了分析,以推断不同区域尺度的变形场。然而,对这些数据的分析通常使用不同版本的GPS数据处理软件,并采用不同的地球物理模型和参数,在许多情况下导致解决方案之间的重大误差和/或不一致。本研究将收集东亚大陆所有可用的运动GPS数据,使用最新软件和具有一致参数化的轨道和地球物理模型对数据进行统一的再处理。因此,运动解决方案内部和之间的数据处理误差将被最小化,并将产生一套统一的长期速度和同震和震后位移的解决方案。该结果将与现有的连续GPS解决方案相结合,最终产品将有助于解决多个区域的详细变形模式,提高解决精度,并提供更好的断层滑动率约束。PI组先前开发的故障网络模型将采用“逆滑”算法。该算法通常只用于块体运动模型,它的引入将克服块体运动和位错断层段方法等其他方法所存在的一些不足,并更好地模拟单个断层周围的弹性应变积累,特别是在逆冲/正断层周围的变形场。改进后的方法和代码将用于反演GPS速度数据的断层滑动率,并有助于表征东亚大陆的变形源、模式、机制和地震潜力。
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)
Integration of GPS and InSAR Data for Resolving 3‐Dimensional Crustal Deformation
- DOI:10.1029/2019ea001036
- 发表时间:2019-12
- 期刊:
- 影响因子:3.1
- 作者:Zheng‐Kang Shen;Zhen Liu
- 通讯作者:Zheng‐Kang Shen;Zhen Liu
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Zheng-Kang Shen其他文献
GPS determined coseismic slip of the 2021 M w7. 4 Maduo, China, earthquake and its tectonic implication
GPS 确定 2021 M w7 的同震滑移。
- DOI:
- 发表时间:
2022 - 期刊:
- 影响因子:2.8
- 作者:
Min Wang;Fan Wang;Xin Jiang;Jianbo Tian;Yu Li;Jianbao Sun;Zheng-Kang Shen - 通讯作者:
Zheng-Kang Shen
Oblique subduction of a Newtonian fluid slab
- DOI:
10.1007/bf00879589 - 发表时间:
1995-09-01 - 期刊:
- 影响因子:1.900
- 作者:
Zheng-Kang Shen - 通讯作者:
Zheng-Kang Shen
Impoundment of the Zipingpu reservoir and triggering of the 2008 Mw 7.9 Wenchuan earthquake, China
紫坪铺水库蓄水引发2008年中国汶川7.9级地震
- DOI:
10.1002/2014jb011766 - 发表时间:
2015-10 - 期刊:
- 影响因子:0
- 作者:
Wei Tao;Timothy Masterlark;Zheng-Kang Shen;Erika Ronchin - 通讯作者:
Erika Ronchin
Zheng-Kang Shen的其他文献
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{{ truncateString('Zheng-Kang Shen', 18)}}的其他基金
Fault Zone Rheology and Deformation Mechanisms of Tibetan Plateau Constrained by Space Geodesy Measurements
空间大地测量约束下的青藏高原断裂带流变与变形机制
- 批准号:
0911762 - 财政年份:2009
- 资助金额:
$ 23.25万 - 项目类别:
Standard Grant
Collaborative Research: Quantifying the Dynamics of Asia Using GPS, Geologic and Shear-Wave Splitting Data, and Large-Scale Flow Models
合作研究:利用 GPS、地质和剪切波分裂数据以及大规模流动模型量化亚洲动态
- 批准号:
0609656 - 财政年份:2006
- 资助金额:
$ 23.25万 - 项目类别:
Continuing Grant
Collaborative Research: Deformation and Stress Modeling of the 2001 Kokoxili Earthquake, Western China
合作研究:2001 年中国西部可可西里地震的变形和应力模拟
- 批准号:
0409902 - 财政年份:2004
- 资助金额:
$ 23.25万 - 项目类别:
Standard Grant
Small Grants for Exploratory Research: Collaborative Project: Rapid Response to the November 14, 2001 Kunlun Fault Earthquake
探索性研究小额资助:合作项目:2001年11月14日昆仑断层地震的快速响应
- 批准号:
0209434 - 财政年份:2002
- 资助金额:
$ 23.25万 - 项目类别:
Standard Grant
Collaborative Research: GPS Crustal Deformation Monitoring in China
合作研究:中国GPS地壳变形监测
- 批准号:
9903143 - 财政年份:1999
- 资助金额:
$ 23.25万 - 项目类别:
Standard Grant
Collaborative Research: GPS Crustal Deformation Monitoring in China
合作研究:中国GPS地壳变形监测
- 批准号:
9805010 - 财政年份:1998
- 资助金额:
$ 23.25万 - 项目类别:
Standard Grant
U.S.-China Cooperative Research: GPS Studies in Northern China
中美合作研究:中国北方的 GPS 研究
- 批准号:
9602179 - 财政年份:1996
- 资助金额:
$ 23.25万 - 项目类别:
Standard Grant
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