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Near-Surface Characterization of the Llancanelo Lake Region (Argentina) by Surface-Wave Analysis of 2D Reflection Data
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 24th European Meeting of Environmental and Engineering Geophysics, Sep 2018, Volume 2018, p.1 - 5
Abstract
The inversion of surface-wave dispersion curves is a reliable method to derive near-surface shear-wave velocity profiles. In this contribution, we invert 2D seismic-reflection data acquired as part of a paleoenvironmental study of the Llancanelo Lake basin (southern Mendoza Province, Argentina), that cannot be used to image the first 50 m with reflection processing due to its characteristics. Though exhibiting severe spatial aliasing, the Rayleigh dispersion curves were successfully sampled and then inverted to obtain 2D shallow shear-wave velocity profiles. The results are compatible with the already known stratigraphy of the near-surface in the region, and provide more details on the uppermost layers, particularly some differences in the seismic response of different sedimentary deposits.