USAP-DC

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Shear Wave Splitting Analysis and Seismic Anisotropy beneath the Northern Transantarctic Mountains Data DOI: https://doi.org/10.15784/601019 Cite as Hansen, S. (2017) "Shear Wave Splitting Analysis and Seismic Anisotropy beneath the Northern Transantarctic Mountains" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601019. AMD - DIF Record(s) USAP-1148982_1 Abstract Using data from the Transantarctic Mountains (TAMs) Northern Network, shear-wave splitting analysis has been employed to constrain azimuthal anisotropy beneath a portion of the northern TAMs. Splitting measurements were made for PKS, SKS, and SKKS phases with the eigenvalue method in SplitLab. The results show two distinct geographic regions of anisotropy: one behind the TAMs front and the other along the Ross Sea coastline. The anisotropic structure behind the TAMs front is best attributed to relict fabric associated with past tectonic episodes. Along the coastline, the anisotropy is interpreted to reflect mantle flow associated with rift-related decompression melting and Cenozoic extension. Creator(s): Hansen, Samantha Date Created: 2017-04-20 Repository: USAP-DC (current) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: 153.327, East: 165.120012, South: -76.237352, North: -73.032547 Award(s) NSF 1148982 Version: 1 Related Project(s) CAREER: Deciphering the Tectonic History of the Transantarctic Mountains and the Wilkes Subglacial Basin References Graw, J.H. and S.E. Hansen, (2017). Upper mantle seismic anisotropy beneath the Northern Transantarctic Mountains, Antarctica from PKS, SKS, and SKKS splitting analysis, Geochem. Geophys. Geosys., 18, doi:10.1002/2016GC006729. (doi:10.1002/2016GC006729) Keywords Antarctica Geology/Geophysics - Other GPS Sample/collection Description Seismology Shearwave Spitting Solid Earth Transantarctic Mountains