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www.the-cryosphere-discuss.net/4/1635/2010/
doi:10.5194/tcd-4-1635-2010
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under the Creative Commons Attribution 3.0 License.
Do crustal deformations observed by GPS in Tierra del Fuego (Argentina) reflect glacial-isostatic adjustment?
1Departamento de Astrometría, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, La Plata, Argentina
2Institut für Planetare Geodäsie, Technische Universität Dresden, Dresden, Germany
3CONICET, Argentina
Abstract. Vertical site velocities determined by geodetic GPS observations in the Lago Fagnano area, Tierra del Fuego main island, are interpreted with respect to their potential relation with the glacial-isostatic crustal response to ice mass changes. The spatial pattern of the uplift rates, in combination with the horizontal crustal deformation pattern, point towards a fault-tectonic rather than glacial-isostatic origin of the determined vertical crustal deformations. This implies rather small GIA effects pointing towards relatively small Holocene ice-mass changes in Tierra del Fuego. However, these findings are considered to be preliminary. They should be confirmed by additional observations covering an extended area with GPS sites.
Discussion Paper (PDF, 1314 KB) Interactive Discussion (Closed, 4 Comments) Publication in TC not foreseen Special Issue
Citation: Mendoza, L., Richter, A., Hormaechea, J. L., Perdomo, R., Del Cogliano, D., Dietrich, R., and Fritsche, M.: Do crustal deformations observed by GPS in Tierra del Fuego (Argentina) reflect glacial-isostatic adjustment?, The Cryosphere Discuss., 4, 1635-1645, doi:10.5194/tcd-4-1635-2010, 2010. Bibtex EndNote Reference Manager XML
