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dc.contributor.authorChen, Min
Huang, Hui
Yao, Huajian
van der Hilst, Rob
Niu, Fenglin
dc.date.accessioned 2014-04-04T21:32:12Z
dc.date.available 2014-04-04T21:32:12Z
dc.date.issued 2014
dc.identifier.citation Chen, Min, Huang, Hui, Yao, Huajian, et al.. "Low wave speed zones in the crust beneath SE Tibet revealed by ambient noise adjoint tomography." Geophysical Research Letters, 41, no. 2 (2014) 334-340. http://dx.doi.org/10.1002/2013GL058476.
dc.identifier.urihttp://hdl.handle.net/1911/75816
dc.description.abstract We present a refined 3D crustal model beneath SE Tibet from ambient noise adjoint tomography. Different from ray-theory-based tomography, adjoint tomography in this study incorporates a spectral-element method (SEM) and takes empirical Green's functions (EGFs) of Rayleigh waves from ambient noise interferometry as the direct observation. The frequency-dependent traveltime misfits between SEM synthetic Green's functions and EGFs are minimized with a preconditioned conjugate gradient method, meanwhile the 3D model gets improved iteratively utilizing 3D finite-frequency kernels. The new model shows 3 - 6% shear wave speed increasing beneath the western Sichuan Basin (SCB) (depth>15 km) and the central Chuan-Dian Block (CDB), and 6 - 12% shear wave speed reduction in the mid-lower crust beneath the northern and the southern CDB. The inferred spatial pattern of low wave speed zones, consistent with possible partial melt, suggests more complex and disconnected geometry than the pervasive narrow zone from the channel flow models.
dc.language.iso eng
dc.rights Article 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.title Low wave speed zones in the crust beneath SE Tibet revealed by ambient noise adjoint tomography
dc.type Journal article
dc.citation.journalTitle Geophysical Research Letters
dc.citation.volumeNumber 41
dc.citation.issueNumber 2
dc.contributor.publisher American Geophysical Union
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1002/2013GL058476
dc.identifier.grantID TGEAR130011
dc.identifier.grantID EAR0910618
dc.identifier.grantID TGEAR130022
dc.identifier.grantID NSF0748455
dc.identifier.grantID NSFC41222028
dc.identifier.grantID NSFC41274099
dc.type.publication publisher version
dc.citation.firstpage 334
dc.citation.lastpage 340


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