Seismic evidence for lithospheric modification associated with intracontinental volcanism in Northeastern China

Using data predominantly from the NECESS Array, but also incorporating surface wave data from surrounding networks, we present the results of a Bayesian Monte Carlo inversion of receiver functions, Rayleigh wave ellipticity (H/V ratio) and Rayleigh wave group and phase speeds from 8 to 80 s period f...

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Bibliographic Details
Published in:Geophysical Journal International
Main Authors: Kang, Dou, Shen, Weisen, Ning, Jieyuan, Ritzwoller, Michael H.
Other Authors: Shen, WS (reprint author), Univ Colorado, Dept Phys, Boulder, CO 80309 USA., Peking Univ, Sch Earth & Space Sci, Inst Theoret & Appl Geophys, Beijing 100871, Peoples R China., Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
Format: Journal/Newspaper
Language:English
Published: GEOPHYSICAL JOURNAL INTERNATIONAL 2016
Subjects:
Online Access:https://hdl.handle.net/20.500.11897/438056
https://doi.org/10.1093/gji/ggv441
Description
Summary:Using data predominantly from the NECESS Array, but also incorporating surface wave data from surrounding networks, we present the results of a Bayesian Monte Carlo inversion of receiver functions, Rayleigh wave ellipticity (H/V ratio) and Rayleigh wave group and phase speeds from 8 to 80 s period for the 3-D shear velocity structure of the crust and uppermost mantle beneath Northeast China. We define the final model as the mean and standard deviation of the posterior distribution at each location on a 0.5 degrees x 0.5 degrees grid from the surface to 150 km depth. The primary scientific motivation is to investigate the expression of intracontinental volcanism across the region. The model lithosphere displays prominent features (middle and lower crustal velocity, Moho depth, lithospheric thickness) across the study area that coincide with the location of volcanoes, which are predominantly situated in two distinct volcanic regions, which we call the 'Northeast China Lineated Quaternary Volcanic Zone', found near the eastern margin of the Songliao Basin and extending to Changbaishan Volcano, and the 'Northern and Southern Greater Xing'an Range Pleistocene Volcanic Zones'. There is a strong similarity between the lateral distribution of depth-integrated mantle velocity anomalies in our model with the teleseismic body wave model of Tang et al., although the vertical distribution of anomalies differ. NSFC [41130316]; NSF at University of Colorado at Boulder [EAR-1246925]; Seismological Facilities for the Advancement of Geoscience and EarthScope (SAGE) Proposal of National Science Foundation [EAR-1261681]; National Science Foundation [CNS-0821794]; University of Colorado at Boulder; University of Colorado Denver; National Center for Atmospheric Research SCI(E) EI ARTICLE Weisen.Shen@colorado.edu 1 215-235 204