A new method to constrain shallow crustal S-wave velocities based on direct P-wave amplitudes in receiver functions and its application in northeastern Tibet

Wang, Xu; Chen, Ling; Ling, Yuan Yuan; Gao, Yifan; Zhang, Jianyong; Yao, Huajian

doi:10.1007/s11430-018-9443-6

Cited by 9 publications

(13 citation statements)

References 31 publications

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“…Equations and are based on an assumption that seismic waves are of infinitely high frequency, which is, however, not physically achievable. PHVR is indeed frequency dependent (Park et al., 2019; X. Wang et al., 2019), and we redefine it as

PHVR (f_{c}) = \frac{R_{PRF} (f_{c}, t badbreak= 0)}{Z_{PRF} (f_{c}, t badbreak= 0)},

where

f_{c}

is the high cutoff frequency controlled by the Gaussian parameter used in P‐RF calculation (X. Wang et al., 2019). SVHR can be defined similarly:

SVHR (f_{c}) = \frac{Z_{SRF} (f_{c}, t badbreak= 0)}{R_{SRF} (f_{c}, t badbreak= 0)},

where

R_{S R F}

and

Z_{S R F}

are the radial and vertical S wave receiver functions (S‐RFs), constructed by deconvolving the radial component from itself and the radial from vertical components, respectively (Figures ).…”

Section: Methodsmentioning

confidence: 99%

“…X. Wang et al. (2019) and Park et al. (2019) observed the frequency dependence of PHVRs and established empirical relationships between PHVR frequency and its sensitivity to depth to constrain the Vs structure at shallow depths for individual stations.…”

Section: Introductionmentioning

confidence: 99%

“…X. Wang et al (2019) and Park et al (2019) observed the frequency dependence of PHVRs and established empirical relationships between PHVR frequency and its sensitivity to depth to constrain the Vs structure at shallow depths for individual stations. PHVRs have been reported to be dominated by Vs and thus cannot constrain Poisson's ratio by themselves (e.g., Julià, 2007).…”

mentioning

confidence: 99%

“…where c E f is the high cutoff frequency controlled by the Gaussian parameter used in P-RF calculation (X. Wang et al, 2019). SVHR can be defined similarly:…”

mentioning

confidence: 99%

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A New Body‐Wave Amplitude Ratio‐Based Method for Imaging Shallow Crustal Structure and Its Application in the Sichuan Basin, Southwestern China

Wang

Chen

Yao

2021

Geophysical Research Letters

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Information on the composition and structural heterogeneity of the shallow crust provides important constraints for understanding the deformation and evolution of the outermost shell of the Earth. Seismic measurements probe the elastic properties of the Earth's subsurface, from which compositional and structural information can be inferred. Of particular note is Poisson's ratio, which can be determined uniquely from the ratio of P wave velocity (Vp) to S wave velocity (Vs). As an important complement to seismic velocity, Poisson's ratio is highly sensitive to lithology, cracks, and porosity, as well as fluid and melt contents (Mavko et al., 2009); thus, the combination of velocity and Poisson's ratio would reduce the nonuniqueness when determining the nature of rocks.Previous attempts to image the seismic velocity and Poisson's ratio structures of the shallow crust have been limited due to various difficulties with the methods. A popular method is to invert the P and S wave travel times of local earthquakes, but it works only in areas with dense earthquakes and stations because of the strict requirements in ray density (Aki & Lee, 1976;Eberhart-Phillips, 1990). With this method, uncertainties in hypocenter locations also affect the accuracy of the results (e.g., Zhang et al., 2009). Surface-wave-imaging methods utilize surface-wave dispersion and ellipticity data with longer periods than those of body

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PHVR (f_{c}) = \frac{R_{PRF} (f_{c}, t badbreak= 0)}{Z_{PRF} (f_{c}, t badbreak= 0)},

where

f_{c}

is the high cutoff frequency controlled by the Gaussian parameter used in P‐RF calculation (X. Wang et al., 2019). SVHR can be defined similarly:

SVHR (f_{c}) = \frac{Z_{SRF} (f_{c}, t badbreak= 0)}{R_{SRF} (f_{c}, t badbreak= 0)},

where

R_{S R F}

and

Z_{S R F}

are the radial and vertical S wave receiver functions (S‐RFs), constructed by deconvolving the radial component from itself and the radial from vertical components, respectively (Figures ).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

“…where c E f is the high cutoff frequency controlled by the Gaussian parameter used in P-RF calculation (X. Wang et al, 2019). SVHR can be defined similarly:…”

mentioning

confidence: 99%

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A New Body‐Wave Amplitude Ratio‐Based Method for Imaging Shallow Crustal Structure and Its Application in the Sichuan Basin, Southwestern China

Wang

Chen

Yao

2021

Geophysical Research Letters

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“…The very strong amplitudes of reverberations in the western Jaz Murian Basin motivated us to apply this coda autocorrelation method for which very few successful attempts have been reported so far applied to study sedimentary basins (e.g., Chimoto & Yamanaka, 2020; Plescia et al., 2021). The P‐wave polarization method is an interesting complementary method to infer near‐surface S‐wave velocity structures in addition to the interface structure (e.g., Chong et al., 2018; Hannemann et al., 2016; Svenningsen & Jacobsen, 2007; Wang et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

Structure of the Western Jaz Murian Forearc Basin, Southeast Iran, Revealed by Autocorrelation and Polarization Analysis of Teleseismic P and S Waves

et al. 2022

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The Jaz Murian Basin in Southeast Iran is a forearc basin that sits on top of the western Makran subduction zone. A recent seismic deployment inside the western Jaz Murian Basin documents extremely strong reverberations between the free surface and the top of the basement. These strong multiples, which hamper studies of deeper structures, carry precious information on the structure of the basin. Here we combine three independent measurements, including teleseismic P/S‐wave coda autocorrelations, P‐wave polarization analysis and receiver functions, to image the architecture of the western Jaz Murian Basin. The S‐wave velocity structure beneath each station is constrained by teleseismic P‐wave polarization analysis and a simple grid search method. In addition, both P‐ and S‐wave reflections are extracted to measure the Poisson's ratio and the thickness of sediments, in addition to P‐ and/or S‐wave velocities. We find that the sedimentary cover has an average thickness of ∼3 km with very low S‐wave velocities around 1.2 km/s. The estimated Vp/Vs ratios are relatively high between 2.23 and 2.52, suggesting that the western Jaz Murian Basin contains unconsolidated recently deposited sediments.

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Shear-wave velocity structures of the shallow crust beneath the Ordos and Sichuan Basins from multi-frequency direct P-wave amplitudes in receiver functions

Tang

Chen

Wang

2022

Sci. China Earth Sci.

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A new method to constrain shallow crustal S-wave velocities based on direct P-wave amplitudes in receiver functions and its application in northeastern Tibet

Cited by 9 publications

References 31 publications

A New Body‐Wave Amplitude Ratio‐Based Method for Imaging Shallow Crustal Structure and Its Application in the Sichuan Basin, Southwestern China

A New Body‐Wave Amplitude Ratio‐Based Method for Imaging Shallow Crustal Structure and Its Application in the Sichuan Basin, Southwestern China

Structure of the Western Jaz Murian Forearc Basin, Southeast Iran, Revealed by Autocorrelation and Polarization Analysis of Teleseismic P and S Waves

Shear-wave velocity structures of the shallow crust beneath the Ordos and Sichuan Basins from multi-frequency direct P-wave amplitudes in receiver functions

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