Tectonic history of the Calcatapul Formation, Chubut province, Argentina, and the “Gastre fault system”

Gosen, Werner von; Loske, W.

doi:10.1016/j.jsames.2004.08.007

Cited by 61 publications

(64 citation statements)

References 13 publications

(9 reference statements)

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“…In this work we have visited two localities which were subject of controversial observations, in order to perform petrographical, microstructural and anisotropy of the magnetic susceptibility studies to contribute to the ongoing discussion. The results mostly agree with the findings von Gosen and Loske (2004) in that rocks spatially and temporally associated to the Gastre Fault System do not show evidence supporting the existence of a major dextral fault system active during Jurassic times.…”

Section: Introductionsupporting

confidence: 90%

“…In contrast, Franzese and Martino (1998) suggested an oblique reverse displacement with a sinistral component after studying the same outcrops that of Rapela et al (1991). Recently, von Gosen and Loske (2004) reported heterogeneous deformation, with rocks in the western sector of the Gastre Fault System recording penetrative shortening with dip-slip displacement. Another aspect that led to opposite interpretations is the relationship between the fault system and the granitoids.…”

Section: Introductionmentioning

confidence: 99%

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Anisotropy of magnetic susceptibility study in two classical localities of the Gastre Fault System, central Patagonia

Zaffarana

Luchi

Somoza

et al. 2010

Journal of South American Earth Sciences

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Section: Introductionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Anisotropy of magnetic susceptibility study in two classical localities of the Gastre Fault System, central Patagonia

Zaffarana

Luchi

Somoza

et al. 2010

Journal of South American Earth Sciences

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“…Therefore, the Lanalhue Fault Zone cannot reflect an original curvature of the continental margin. A previously suggested transcontinental, NW-SE trending shear zone as a possible reason for this margin dissection seems unlikely as hypothetically Lanalhue-correlated strike-slip structures in Argentina are either dextral, Mesozoic in age, or entirely disputable (Rapela and Pankhurst, 1992;von Gosen and Loske, 2004). The reason for margin dissection may thus be found within the evolving active margin system itself.…”

Section: Model Of Margin Evolutionmentioning

confidence: 80%

Differential Late Paleozoic active margin evolution in South-Central Chile (37°S–40°S) – the Lanalhue Fault Zone

Glodny

Echtler

Collao

et al. 2008

Journal of South American Earth Sciences

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“…In the Frontal Cordillera, the onset of the Anden cycle takes place in the Permian, while in the Northpatagonian Andes and its foreland, the orogenic phase linked to the Gondwanan cycle extended throughout the Permian period and probably into the Triassic (von Gosen and Loske, 2004), so that the Andean cycle did not start until the Jurassic.…”

Section: Structures Of the Andean Cyclementioning

confidence: 99%

Stratigraphy, structure and geodynamic evolution of the Paleozoic rocks in the Cordillera del Viento (37º S latitude, Andes of Neuquén, Argentina)

Giacosa

Allard

Foix

et al. 2014

Journal of Iberian Geology

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The Pre-Andean Paleozoic substrate from the Cordillera del Viento anticline is a polyorogenic basement composed of two groups of preorogenic rocks with different stratigraphy and deformation. The oldest set consists of pre-Late Devonian metasedimentary rocks belonging to the Guaraco Norte Formation. The upper set is formed by the thick volcano-sedimentary sequence of the Carboniferous Andacollo Group. This group is composed from bottom to top of the silicic volcanic rocks of the Arroyo del Torreón Formation (early Carboniferous) and the marine sedimentary rocks of the Huaraco Formation (late Carboniferous) developed in an extensional basin. Both formations are locally separated by minor syn-extensional unconformities.The relationship between the metamorphic rocks of the Guaraco Norte Formation and the volcano-sedimentary sequence of the Andacollo Group is not observed, but we inferred a major angular unconformity associated with the Late Devonian-early Carboniferous Chanic orogeny. The main Chanic structures are tight vertical and subvertical folds with slight W-WSW vergence, formed under low-grade metamorphic conditions, with the development of a pervasive axial-plane cleavage (S1), affected by a disjunctive crenulation cleavage (S2).In the early Permian, during the San Rafael orogeny of the Gondwanan orogenic cycle, deformation occurred under very low-grade to non-metamorphic conditions. The main structures are thrusts and associated folds that are re-folded by the Cordillera del Viento anticline, related to the Andean orogeny. The WNW-oriented and SSW-vergent folds are associated with an incipient axial-plane cleavage in the pyroclastic rocks and pencil lineation in shales.The pre-Andean Paleozoic basement rocks are intruded and unconformably covered by early Permian to Early Triassic? granitoids and silicic volcanic rocks from the Huingancó volcanic-plutonic Complex (equivalent to the Choiyoi Group), establishing the beginning of the Andean orogenic cycle in this region.Keywords: Andes, Paleozoic, Tectonics, Chanic Orogeny, Cordillera del Viento Resumen El sustrato paleozoico pre-andino que aflora en el anticlinal de la Cordillera del Viento, es un basamento poliorogénico que está compuesto por dos conjuntos de rocas preorogénicas con estratigrafía y condiciones de deformación diferentes. El más antiguo tiene una edad devónica superior y está formado por las rocas metasedimentarias de la Formación Guaraco Norte, en tanto que el conjunto superior son las espesas acumulaciones volcano-sedimentarias carboníferas del Grupo Andacollo. Este grupo, integrado en su parte inferior por rocas volcánicas silíceas de la Formación Arroyo del Torreón (Carbonífero inferior) y hacia techo, por las sedimentitas clásticas marinas de la Formación Huaraco (Carbonífero superior) fue desarrollado en el marco de una cuenca extensional y pueden estar separadas localmente por discordancias menores de carácter sin-extensional.Las relaciones entre las rocas metamórficas y la secuencia volcano-sedimentaria del Carbonífero no se ...

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Tectonic history of the Calcatapul Formation, Chubut province, Argentina, and the “Gastre fault system”

Cited by 61 publications

References 13 publications

Anisotropy of magnetic susceptibility study in two classical localities of the Gastre Fault System, central Patagonia

Anisotropy of magnetic susceptibility study in two classical localities of the Gastre Fault System, central Patagonia

Differential Late Paleozoic active margin evolution in South-Central Chile (37°S–40°S) – the Lanalhue Fault Zone

Stratigraphy, structure and geodynamic evolution of the Paleozoic rocks in the Cordillera del Viento (37º S latitude, Andes of Neuquén, Argentina)

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