Joint receiver function/ScS reverberation analysis for examining discontinuity structure beneath Ocean Islands

摘要

In this study, we compare two methods commonly used to image mantle interfaces: teleseismic receiver functions and ScS reverberations. The ScS method benefits from the use of absolute travel times and therefore better constrains discontinuity depths, while receiver functions benefit from better event coverage and highfrequency resolution. We apply these methods to a permanent station located in the Hawaiian Islands and present a proof of concept for the joint application of the two techniques. First, ScS reverberations are used to assess mantle discontinuity depths and whole-mantle travel times. Based on this preliminary model, receiver functions are subsequently used to refine both lateral and vertical discontinuity structure. The validity of the combined results is assessed by benchmarking the receiver functions with a local tomographic velocity model (Wolfe et al., 2009).