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Solid Earth An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/se-2017-58
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
14 Jul 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Solid Earth (SE).
Resolution analysis of joint inversion of seismic receiver function and surface wave dispersion curves in the 13 BB Star experiment
Kajetan Chrapkiewicz1,a, Monika Wilde-Piórko1, Marcin Polkowski1, and Marek Grad1 1University of Warsaw, Faculty of Physics, Institute of Geophysics, Warsaw, Poland
acurrently at: Imperial College London, Department of Earth Science and Engineering, London, UK
Abstract. Joint inversion of Rayleigh wave phase velocity dispersion and P receiver function has been applied to study the structure of the upper mantle beneath the south-western margin of the East European Craton. The data were gathered in the passive seismic experiment 13 BB Star (2013–2016) in the area of the crust recognized from previous borehole and refraction surveys. Several fundamental issues inherent in the linearised inversion were addressed in this work, including exploitation of a priori knowledge, choice of model's depth, trapping by local minima associated with non-uniqueness of the misfit-function optimization problem, proper weighting of data sets characterized by different uncertainties, and credibility of the final models. The last was investigated with novel 1D checkerboard tests juxtaposed with resolution matrix analysis. We advocate the usefulness of linearised approach when handled with proper care, and show that the resolution analysis is an indispensable step when choosing the inversion parameters. It allowed us to obtain reliable S-wave velocity models down to 200 km depth beneath the 13 BB Star array, indicating the presence of a Paleozoic asthenosphere and the ceiling of the deeper, Precambrian, lithosphere-asthenosphere transition zone.

Citation: Chrapkiewicz, K., Wilde-Piórko, M., Polkowski, M., and Grad, M.: Resolution analysis of joint inversion of seismic receiver function and surface wave dispersion curves in the 13 BB Star experiment, Solid Earth Discuss., https://doi.org/10.5194/se-2017-58, in review, 2017.
Kajetan Chrapkiewicz et al.
Kajetan Chrapkiewicz et al.
Kajetan Chrapkiewicz et al.

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Short summary
This paper touches upon two fundamental issues in Earth sciences. The first one is an inherent non-uniqueness of modeling results, along with profound difficulty in estimating their uncertainty. The second is concerned with the interaction between the convective mantle and plates, which is barely known. We present a successful workflow for studying the bottom of the lithosphere, where the interaction is supposed to occur, mitigating the non-uniqueness and assessing the uncertainty of the result.
This paper touches upon two fundamental issues in Earth sciences. The first one is an inherent...
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