USAP-DC

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Lithospheric thicknesses in Antarctica from Sp receiver functions Data DOI: https://doi.org/10.15784/601899 Cite as Brown, S., & Fischer, K. (2025) "Lithospheric thicknesses in Antarctica from Sp receiver functions" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601899. Abstract This dataset contains the depths of negative velocity gradients that are potentially interpretable as the lithosphere-asthenosphere boundary (LAB) beneath Antarctica, derived from common conversion point stacking of Sp receiver functions. The dataset provides constraints on lithospheric thickness variations, particularly in West Antarctica, where a vertically localized LAB is observed at depths of 70–100 km. In East Antarctica, two zones of well-defined LAB depths are present in regions near the coast at depths of 75-110 km (~140˚E) and 90-130 km (~115˚E). Interpretation of these results and comparison with prior studies are provided in the associated journal article (see References). Creator(s): Brown, Sarah; Fischer, Karen Date Created: 2025-02-12 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -180, East: 180, South: -90, North: -60 Temporal Extent(s) Start: 1980-01-01 - End: 2024-01-01 Award(s) NSF 2201129 Version: 1 Related Project(s) Probing the Western Antarctic Lithosphere and Asthenosphere with New Approaches to Imaging Seismic Wave Attenuation and Velocity References S. E. Brown and K. M. Fischer, Investigating the Antarctic Lithosphere through Sp Receiver Functions Analysis, Geochem., Geophys., Geosys., submitted. Keywords Antarctica Cryosphere LAB Lithosphere Lithospheric Thickness