Post-critical SsPmp and its Applications to Virtual Deep Seismic Sounding 2: 1D Imaging of the Crust/Mantle and Joint Constraints with Receiver Function

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Tianze Liu, Simon Klemperer, Gabriel Ferragut, Chunquan Yu


Virtual Deep Seismic Sounding (VDSS) has recently emerged as a novel method to image the crust-mantle-boundary (CMB) and potentially other lithospheric boundaries. In Liu et al., 2018 (“Part 1”), we showed that the arrival time and waveform of post-critical SsPmp, the post-critical reflection phase at the CMB used in VDSS, is sensitive to multiple attributes of the crust and upper mantle. Here, we present a synthesis on the methodology of deriving Moho depth, crustal average Vp and uppermost mantle Vp from single-station observations of postcritical SsPmp under an 1D assumption. We first verify our methods on synthetic examples and then substantiate it with a case study using data collected by the Yellowknife and POLARIS array in SW Slave Province, which shows good agreement between crustal and upper-mantle properties derived with VDSS and the ones given by previous studies using active source experiments and conventional P receiver functions (PRF). Moreover, we show that PRF-VDSS joint analysis is capable of placing tighter constraint on average crustal composition, which cannot be achieved with either method alone. We demonstrate with our PRF-VDSS joint analysis that the SW Slave Province, Canada has an intermediate crust composition, which likely indicates a Neoarchean age



Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics


body waves, Craton, Crustal imaging, Crustal structure, Teleseismic imaging, Crustal composition, Receiver function, Virtual Deep Seismic Sounding


Published: 2019-03-11 20:16

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GNU Lesser General Public License (LGPL) 2.1

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