Universität zu Köln

Kim, D., Lekic, V., Irving, J. C. E., Schmerr, N., Knapmeyer-Endrun, B., Joshi, R., Panning, M. P., Tauzin, B., Karakostas, F., Maguire, R., Huang, Q., Ceylan, S., Khan, A., Giardini, D., Wieczorek, M. A., Lognonne, P. and Banerdt, W. B. (2021). Improving Constraints on Planetary Interiors With PPs Receiver Functions. J. Geophys. Res.-Planets, 126 (11). WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 2169-9100

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Abstract

Seismological constraints obtained from receiver function (RF) analysis provide important information about the crust and mantle structure. Here, we explore the utility of the free-surface multiple of the P-wave (PP) and the corresponding conversions in RF analysis. Using earthquake records, we demonstrate the efficacy of PPs-RFs before illustrating how they become especially useful when limited data is available in typical planetary missions. Using a transdimensional hierarchical Bayesian deconvolution approach, we compute robust P-to-S (Ps)- and PPs-RFs with InSight recordings of five marsquakes. Our Ps-RF results verify the direct Ps converted phases reported by previous RF analyses with increased coherence and reveal other phases including the primary multiple reverberating within the uppermost layer of the Martian crust. Unlike the Ps-RFs, our PPs-RFs lack an arrival at 7.2 s lag time. Whereas Ps-RFs on Mars could be equally well fit by a two- or three-layer crust, synthetic modeling shows that the disappearance of the 7.2 s phase requires a three-layer crust, and is highly sensitive to velocity and thickness of intra-crustal layers. We show that a three-layer crust is also preferred by S-to-P (Sp)-RFs. While the deepest interface of the three-layer crust represents the crust-mantle interface beneath the InSight landing site, the other two interfaces at shallower depths could represent a sharp transition between either fractured and unfractured materials or thick basaltic flows and pre-existing crustal materials. PPs-RFs can provide complementary constraints and maximize the extraction of information about crustal structure in data-constrained circumstances such as planetary missions.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kim, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lekic, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Irving, J. C. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmerr, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Knapmeyer-Endrun, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Joshi, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Panning, M. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tauzin, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Karakostas, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maguire, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Huang, Q. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ceylan, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Khan, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Giardini, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wieczorek, M. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lognonne, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Banerdt, W. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-603978
DOI:	10.1029/2021JE006983
Journal or Publication Title:	J. Geophys. Res.-Planets
Volume:	126
Number:	11
Date:	2021
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	2169-9100
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MANTLE DISCONTINUITY STRUCTURE; P-TO-S; CRUSTAL THICKNESS; SEISMIC DETECTION; STRUCTURE BENEATH; DECONVOLUTION; LITHOSPHERE; MARS; MOON; MODEL Multiple languages Geochemistry & Geophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/60397