دورية أكاديمية
Structure Along the Martian Dichotomy Constrained by Rayleigh and Love Waves and Their Overtones
| العنوان: | Structure Along the Martian Dichotomy Constrained by Rayleigh and Love Waves and Their Overtones |
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| المؤلفون: | D. Kim, S. C. Stähler, S. Ceylan, V. Lekic, R. Maguire, G. Zenhäusern, J. Clinton, D. Giardini, A. Khan, M. P. Panning, P. Davis, M. Wieczorek, N. Schmerr, P. Lognonné, W. B. Banerdt |
| المصدر: | Geophysical Research Letters, Vol 50, Iss 8, Pp n/a-n/a (2023) |
| بيانات النشر: | Wiley, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Geophysics. Cosmic physics |
| مصطلحات موضوعية: | InSight, Mars, surface waves, Martian crust, Martian dichotomy, Geophysics. Cosmic physics, QC801-809 |
| الوصف: | Abstract Using seismic recordings of event S1222a, we measure dispersion curves of Rayleigh and Love waves, including their first overtones, and invert these for shear velocity (VS) and radial anisotropic structure of the Martian crust. The crustal structure along the topographic dichotomy is characterized by a fairly uniform vertically polarized shear velocity (VSV) of 3.17 km/s between ∼5 and 30 km depth, compatible with the previous study by Kim et al. (2022), https://doi.org/10.1126/science.abq7157. Radial anisotropy as large as 12% (VSH > VSV) is required in the crust between 5 and 40 km depth. At greater depths, we observe a large discontinuity near 63 ± 10 km, below which VSV reaches 4.1 km/s. We interpret this velocity increase as the crust‐mantle boundary along the path. Combined gravimetric modeling suggests that the observed average crustal thickness favors the absence of large‐scale density differences across the topographic dichotomy. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1944-8007 0094-8276 |
| Relation: | https://doaj.org/toc/0094-8276; https://doaj.org/toc/1944-8007 |
| DOI: | 10.1029/2022GL101666 |
| URL الوصول: | https://doaj.org/article/c1da548174244d7d90df387f94423453 |
| رقم الأكسشن: | edsdoj.1da548174244d7d90df387f94423453 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 19448007 00948276 |
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| DOI: | 10.1029/2022GL101666 |