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Joint Inversion of Seismic Body and Surface Wave Data

地震体与面波数据联合反演

基本信息

批准号：
2073302
负责人：
金额：
--
依托单位：
University of Cambridge
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2073302
关键词：
Joint Inversion Seismic Body Surface

项目摘要

Seismic imaging methods such as reflection profiling, wide-angle imaging, surface wave tomography, and teleseismic tomography have played a crucial role in advancing our understanding of the architecture and physical properties of the lithosphere. However, a key challenge that remains is to unravel the structural relationship between the lower crust and adjacent lithospheric mantle; this is essential if we are to properly understand fundamental Earth processes such as continental growth, subduction, rifting, volcanism, delamination and mineralisation. Traditional imaging methods have struggled to address this issue due to the need to account for the Moho and the lack of datasets which can resolve both crustal and upper mantle structure. While several recent advances, including the joint inversion of multiple datasets and ambient noise imaging, have helped to address these challenges, considerable work is still required if we are to achieve a truly integrated view of the lithosphere. The aim of this Project is to develop and apply methods for the joint inversion of body and surface wave data in order to image structure throughout the full thickness of the lithosphere, thereby achieving a greater understanding of the processes which shape the crust-upper mantle system. Full waveform inversion will be the primary tool used in this project, with an emphasis on integrating a range of different datasets, including local earthquake, teleseismic, ambient noise, and where possible active sources.

地震成像方法，如反射剖面，广角成像，面波层析成像，和地震层析成像在推进我们的岩石圈的结构和物理性质的理解中发挥了至关重要的作用。然而，仍然存在的一个关键挑战是解开下地壳和相邻的岩石圈地幔之间的结构关系;如果我们要正确理解基本的地球过程，如大陆生长，俯冲，裂谷，火山作用，分层和矿化，这是必不可少的。传统的成像方法一直在努力解决这个问题，由于需要考虑莫霍面和缺乏数据集，可以解决地壳和上地幔结构。虽然最近的几项进展，包括多个数据集和环境噪声成像的联合反演，有助于解决这些挑战，但如果我们要实现岩石圈的真正综合视图，仍然需要大量的工作。该项目的目的是开发和应用体波和面波数据联合反演的方法，以便对岩石圈整个厚度的结构进行成像，从而更好地了解形成地壳-上地幔系统的过程。全波形反演将是该项目中使用的主要工具，重点是整合一系列不同的数据集，包括当地地震，地震，环境噪声，以及可能的活动源。