Moho imaging based on receiver function analysis with teleseismic wavefield reconstruction: Application to South China

Song, Peiran; Xue-mei, Zhang; Liu, Youshan; Teng, Jun

doi:10.1016/j.tecto.2017.05.031

Cited by 36 publications

(16 citation statements)

References 68 publications

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“…Additionally, the shallow Moho depths beneath the Weihe Basin, Nanyang Basin, and Jianghan Basin and the deep Moho depths beneath the HNMC and SNHL domes and Dabashan Mountains are more easily recognizable (Figure 7). From the southwest to the northeast, the Moho depths beneath the Sichuan Basin increase from 40 to 50 km and then decrease to 40 km beneath the EQL and to 35 km below the Weihe Basin; these findings agree with the results from receiver function analysis (Si et al, 2016;Song et al, 2017; and ambient noise tomography (Jiang et al, 2016). P. Wang et al (2014) and Si et al (2016) discovered that the Moho beneath the Weihe Basin is much shallower than that beneath both the Ordos Basin and the QOB, whereas our results delineate a clear 2-D distribution of the Moho depth.…”

Section: Crustal Thicknesssupporting

confidence: 86%

“…In this study, we collect continuous vertical component seismic data from 71 mobile and 130 permanent China Earthquake Administration stations (Figure b). The mobile stations were deployed by the Institute of Geology and Geophysics, Chinese Academy of Science (Si et al, ; Song et al, ). Among them, the 35 stations marked with a yellow color in Figure b were deployed from March 2013 to April 2014, and the 36 stations marked with a green color were deployed among the previous positions from April 2014 to November 2014 (Figure b).…”

Section: Data and Ambient Noise Tomographymentioning

confidence: 99%

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Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications

et al. 2018

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Determining high‐resolution three‐dimensional (3‐D) crustal structures of the Qinling Orogenic Belt (QOB) can reveal significant evidences to enhance our understanding of its tectonic evolution. By jointly inverting group and phase velocity dispersion curves, we obtain a high‐resolution 3‐D shear wave velocity model for the QOB. According to the obviously layered features, which include an E‐W trending high‐velocity structure in the upper crust (0–10 km), a transitional zone in the middle crust (10–30 km), and an approximately N‐S trending low‐velocity zone in the middle‐lower crust (20–40 km), we elucidate the crustal structure as a flyover model to explain how the crust beneath the QOB was deformed under the perpendicular force systems from the NE‐SW and E‐W directions during the Meso‐Cenozoic. First, the apparent NE‐SW trending low‐velocity zone in the middle‐lower crust indicates that the low‐viscosity crustal materials beneath the northeastern Tibetan Plateau did not flow eastward into the eastern Qinling terrane during the Cenozoic. Second, the extension in the northern Qinling Mountains and Weihe Basin was not largely affected by the lateral crustal growth of the NE Tibetan Plateau, which might be the result of deep mantle upwelling and/or residual effects from the subduction of the western Pacific plate. Third, during the Mesozoic, the high‐velocity structures beneath the Hannan‐Micang and Shennongjia‐Huangling domes served as anchors resisting the northward subduction, rotation, and continuous collision of the Yangtze Block. The eastward extruding Hannan‐Micang dome served as an indenter that eventually shaped the present‐day asymmetric style of the Dabashan Orocline during the Cenozoic.

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Section: Crustal Thicknesssupporting

confidence: 86%

Section: Data and Ambient Noise Tomographymentioning

confidence: 99%

Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications

et al. 2018

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“…By means of P-and S-wave receiver function imaging, suggested Moho/asthenospheric updoming beneath the MLYB, with the shallowest Moho located at 28km depth beneath the Ningwu ore field. Similar results were obtained with the H-k stacking method (Huang et al, 2015;Song et al, 2017) and the integrated inversion of surface wave and receiver function (Li H Y et al, 2018).…”

Section: Metallogenic Background For the Mlybsupporting

confidence: 82%

Three‐dimensional P‐wave Velocity Structure Modelling of the Middle and Lower Reaches of the Yangtze River Metallogenic Belt: Crustal Architecture and Metallogenic Implications

Chen

Lü

Zhou

et al. 2020

Acta Geologica Sinica (Eng)

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In this study, we compiled and analyzed 69310 P‐wave travel‐time data from 6639 earthquake events. These events (M ≥ 2.0) occurred from 1980s to June 2019 and were recorded at 319 seismic stations (Chinese Earthquake Networks Center) in the study area. We adopted the double‐difference seismic tomographic method (tomoDD) to invert the 3‐D P‐wave velocity structure and constrain the crust‐upper mantle architecture of the Middle and Lower Reaches of the Yangtze River Metallogenic Belt (MLYB). A 1‐D initial model extracted from wide‐angle seismic profiles was used in the seismic tomography, which greatly reduced the inversion residual. Our results indicate that reliable velocity structure of the uppermost mantle can be obtained when Pn is involved in the tomography. Our results show that: (1) the pattern of the uppermost mantle velocity structure corresponds well with the geological partitioning: a nearly E–W‐trending low‐velocity zone is present beneath the Dabie Orogen, in contrast to the mainly NE‐trending low‐velocity anomalies beneath the Jiangnan Orogen. They suggest the presence of thickened lower crust beneath the orogens in the study area. In contrast, the Yangtze and Cathaysia blocks are characterized by relatively high‐velocity anomalies; (2) both the ultra‐high‐pressure (UHP) metamorphic rocks in the Dabie Orogen and the low‐pressure metamorphic rocks in the Zhangbaling dome are characterized by high‐velocity anomalies. The upper crust in the Dabie Orogen is characterized by a low‐velocity belt, sandwiched between two high velocity zones in a horizontal direction, with discontinuous low‐velocity layers in the middle crust. The keel of the Dabie Orogen is mainly preserved beneath its northern section. We infer that the lower crustal delamination may have mainly occurred in the southern Dabie Orogen, which caused the mantle upwelling responsible for the formation of the granitic magmas emplaced in the middle crust as the low‐velocity layers observed there. Continuous deep‐level compression likely squeezed the granitic magma upward to intrude the upper crustal UHP metamorphic rocks, forming the ‘sandwich’ velocity structure there; (3) high‐velocity updoming is widespread in the crust‐mantle transition zone beneath the MLYB. From the Anqing‐Guichi ore field northeastward to the Luzong, Tongling, Ningwu and Ningzhen orefields, high‐velocity anomalies in the crust‐mantle transition zone increase rapidly in size and are widely distributed. The updoming also exists in the crust‐mantle transition zone beneath the Jiurui and Edongnan orefields, but the high‐velocity anomalies are mainly stellate distributed. The updoming high‐velocity zone beneath the MLYB generally extends from the crust‐mantle transition zone to the middle crust, different from the velocity structure in the upper crust. The upper crust beneath the Early Cretaceous extension‐related Luzong and Ningwu volcanic basins is characterized by high velocity zones, in contrast to the low velocity anomalies beneath the Late Jurassic to Early Cretac...

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“…In global seismology community, several methods have been proposed to interpolate the irregularly sampled seismic data. Most earlier studies have been concentrating on interpolating the receiver functions 26 that consist of P to S converted waves based on a certain form of spatial smoothing, including, for example, weighted stacking with either linear 27 , gaussian 28,29 , or cubic spline functions 30,31 . Also implemented are methods based on high-resolution Radon transform 32 , singular spectrum analysis 33,34 and, more recently, non-linear waveform stretching-and-squeezing 35 .…”

Section: Introductionmentioning

confidence: 99%

Obtaining free USArray data by multi-dimensional seismic reconstruction

2019

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USArray, a pioneering project for the dense acquisition of earthquake data, provides a semi-uniform sampling of the seismic wavefield beneath its footprint and greatly advances the understanding of the structure and dynamics of Earth. Despite continuing efforts in improving the acquisition design, network irregularity still causes spatial sampling alias and incomplete, noisy data, which imposes major challenges in array-based data analysis and seismic imaging. Here we employ an iterative rank-reduction method to simultaneously reconstruct the missing traces and suppress noise, i.e., obtaining free USArray recordings as well as enhancing the existing data. This method exploits the spatial coherency of three-dimensional data and recovers the missing elements via the principal components of the incomplete data. We examine its merits using simulated and real teleseismic earthquake recordings. The reconstructed P wavefield enhances the spatial coherency and accuracy of tomographic travel time measurements, which demonstrates great potential to benefit seismic investigations based on array techniques.

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Moho imaging based on receiver function analysis with teleseismic wavefield reconstruction: Application to South China

Cited by 36 publications

References 68 publications

Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications

Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications

Three‐dimensional P‐wave Velocity Structure Modelling of the Middle and Lower Reaches of the Yangtze River Metallogenic Belt: Crustal Architecture and Metallogenic Implications

Obtaining free USArray data by multi-dimensional seismic reconstruction

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