Artículo
Lithospheric Erosion in the Patagonian Slab Window, and Implications for Glacial Isostasy
Mark, Hannah F.; Wiens, Douglas A.; Ivins, Erik R.; Richter, Andreas Jorg
; Ben Mansour, Walid; Magnani, M. Beatrice; Marderwald, Eric Rodolfo
; Adaros, Rodrigo; Barrientos, Sergio
Fecha de publicación:
01/2022
Editorial:
American Geophysical Union
Revista:
Geophysical Research Letters
ISSN:
0094-8276
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The Patagonian slab window has been proposed to enhance the solid Earth response to ice mass load changes in the overlying Northern and Southern Patagonian Icefields (NPI and SPI, respectively). Here, we present the first regional seismic velocity model covering the entire north-south extent of the slab window. A slow velocity anomaly in the uppermost mantle indicates warm mantle temperature, low viscosity, and possibly partial melt. Low velocities just below the Moho suggest that the lithospheric mantle has been thermally eroded over the youngest part of the slab window. The slowest part of the anomaly is north of 49°S, implying that the NPI and the northern SPI overlie lower viscosity mantle than the southern SPI. This comprehensive seismic mapping of the slab window provides key evidence supporting the previously hypothesized connection between post-Little Ice Age anthropogenic ice mass loss and rapid geodetically observed glacial isostatic uplift (≥4 cm/yr).
Palabras clave:
SEISMOLOGY
,
VELOCITY STRUCTURE
,
PATAGONIA
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Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Citación
Mark, Hannah F.; Wiens, Douglas A.; Ivins, Erik R.; Richter, Andreas Jorg; Ben Mansour, Walid; et al.; Lithospheric Erosion in the Patagonian Slab Window, and Implications for Glacial Isostasy; American Geophysical Union; Geophysical Research Letters; 49; 2; 1-2022; 1-10
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