The Gastre Fault Zone (GFZ) is a NW-SE striking dextral Jurassic Gastre Fault System (cf. Rapela & Pankhurst, 1992) in Central Patagonia, Argentina.
From a tentative correlation of the fault zone with the similarly NW-SE trend, it was termed âÂÂGastre Fault Zoneâ or âÂÂGastre-Purén Fault Zoneâ to the Lanalhue Fault Zone in Chile by early works. However, in later works it is shown that this correlation is incorrect. Since the lake âÂÂLago LanalhueâÂÂ, is located on the fault trace and shows a NW-SE-elongated shape, âÂÂLanalhue Fault Zone (LFZ)â 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 LanÃÂn volcanoes.