Gastre Fault

The Gastre Fault Zone (GFZ) is a NW-SE striking dextral Jurassic Gastre Fault System (cf. Rapela & Pankhurst, 1992) in Central Patagonia, Argentina.[1]

From a tentative correlation of the fault zone with the similarly NW-SE trend, it was termed ‘Gastre Fault Zone’ or ‘Gastre-Purén Fault Zone’ to the Lanalhue Fault Zone in Chile by early works. However, in later works [2] it is shown that this correlation is incorrect. Since the lake ‘Lago Lanalhue’, is located on the fault trace and shows a NW-SE-elongated shape, ‘Lanalhue Fault Zone (LFZ)’ stands as appropriate name for the here discussed fault zone. The Mocha-Villarrica Fault Zone is the NW-SE trending fault responsible for the alignment of Villarrica, Quetrupillán and Lanín volcanoes.[3]

References
  1. W. von Gosena and W. Loskeb, 2004. Tectonic history of the Calcatapul Formation, Chubut province, Argentina, and the “Gastre fault system”
  2. "Glodny, J., Echtler, H., Collao, S., Ardiles, M., Burón, P., Figueroa, O. (2008): Differential Late Paleozoic active margin evolution in South-Central Chile (37°S-40°S) -The Lanalhue Fault Zone. - Journal of South American Earth Sciences, 26, 4, 397-411"
  3. Moreno et al. MODELAMIENTO DE DISLOCACIÓN ELÁSTICA EN EL BLOQUE DE ARAUCO (36-38°S), BASADO EN DATOS DE GPS Y EN LA GEOMETRIA DE LAS TERRAZAS MARINAS ALZADAS
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