Joint inversion of receiver functions and surface waves with enhanced preconditioning on densely distributed CNDSN stations: Crustal and upper mantle structure beneath China

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dc.citation.firstpage743
dc.citation.issueNumber2
dc.citation.journalTitleJournal of Geophysical Research: Solid Earth
dc.citation.lastpage766
dc.citation.volumeNumber121
dc.contributor.authorChen, Youlin
dc.contributor.authorNiu, Fenglin
dc.date.accessioned2017-05-23T19:32:18Z
dc.date.available2017-05-23T19:32:18Z
dc.date.issued2016
dc.description.abstractWe present shear wave velocity structure beneath China by joint modeling of teleseismic receiver function and Rayleigh wave group velocity dispersion data observed at +1000 permanent broadband seismic stations in the Chinese National Digital Seismic Network (CNDSN). A ray-parameter-based stacking method is employed to minimize artifacts in stacking receiver functions from different sources. The Rayleigh wave dispersion curve is extracted from group velocity tomographic models at all applicable periods. Enhanced preconditions are applied on the linearized iterative inversion to regularize and balance multiple types of data. The velocity profile inversion at each station starts from an initial model derived from sediments, crustal thickness, Vp/Vs ratio and Pn/Sn models. This multistep approach not only reduces uncertainty and nonuniqueness of the velocity inversion but also efficiently fills information gap in each data set. We then generate a 3-D S velocity model by combining and smoothing all the 1-D models. The obtained 3-D model reveals crustal and upper mantle velocity structures that are well correlated with tectonic features of China, for example, our model shows a clear east-west bimodal distribution at 35 km deep, low velocity in the crust beneath central and eastern Tibetan plateau, and sedimentary structure in major cratons and basins. Our model is consistent with existing tomographic models in large scale but provides more structural details in regional and local scales.
dc.identifier.citationChen, Youlin and Niu, Fenglin. "Joint inversion of receiver functions and surface waves with enhanced preconditioning on densely distributed CNDSN stations: Crustal and upper mantle structure beneath China." <i>Journal of Geophysical Research: Solid Earth,</i> 121, no. 2 (2016) Wiley: 743-766. https://doi.org/10.1002/2015JB012450.
dc.identifier.doihttps://doi.org/10.1002/2015JB012450
dc.identifier.urihttps://hdl.handle.net/1911/94364
dc.language.isoeng
dc.publisherWiley
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.titleJoint inversion of receiver functions and surface waves with enhanced preconditioning on densely distributed CNDSN stations: Crustal and upper mantle structure beneath China
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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