Fig. 2: Imaging lithospheric discontinuities using S receiver function (SRF).
From: Dual-layered mantle lithosphere beneath southeastern Canadian Cordillera
a Color-coded depths that correspond to the maximum amplitudes (Phase 1) of stacked SRFs. The time-to-depth migration is computed based on PREM34. Grey and white circles indicate the clusters of stations used to compute the mean SRFs. Red rectangles mark five sub-regions. b Sample SRF stacks from our study region. SRF results for all data are filtered between 0.02 and 0.2 Hz (or 0.1 Hz). Grey and red colors correspond to velocity increase and decrease with depth, respectively. Solid black lines show stacked SRFs, and blue dashed lines mark the averages of bootstrapping stacks (light grey lines). The error envelopes (black dashed lines) correspond to the ±2σ confidence intervals of stacked amplitudes. The algorithm of bootstrap resampling can be found in the method and supplementary information, and the maximum amplitude of each SRF is normalized to unity. The interpreted Laurentia Lithosphere-Asthenosphere Boundary (LLAB) and Cordillera Lithosphere-Asthenosphere Boundary (CLAB) are marked using vertical cyan and blue lines, respectively. c The mean SRFs of the Cordillera and the Craton computed from subsets of stations (white and grey circles) shown in (a). The vertical blue and cyan lines indicate the seismic phases corresponding to CLAB and LLAB, respectively.
