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Ricardo Gómez,Maisa Tunik,Silvio Casadío
Pág. 256 - 274
The Upper Cretaceous nonmarine deposits of the Neuquén Basin have an important regional exposure. These deposits are included in the Neuquén Group, a well-studied unit in both the south and central part of the basin. However, the northernmost exposed bet...
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Sebastián Oriolo,Ernesto Osvaldo Cristallini,María Silvia Japas,Daniel Leonardo Yagupsky
Pág. 20 - 35
Analogue models combining different sets of preexisting structural weaknesses were developed to understand their evolution during regional ~ENE shortening. Strain analysis of simulations was performed with the GEODEF 1.1 software, a tool that allows to q...
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Jose Francisco Mescua,Laura Beatriz Giambiagi,Victor Alberto Ramos
Pág. 102 - 116
The Cordillera de los Andes is the typical example of a subduction-related orogen. Its present topography is the result of post-Miocene uplift, however, Andean compressional deformation and uplift started in the Late Cretaceous, as increasingly recognize...
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Nemesio Heredia,Pedro Farias,Joaquín García-Sansegundo,Laura Giambiagi
Pág. 242 - 257
The Andean Paleozoic basement of the Cordón del Plata (Argentina) consists of two sets of rocks showingdifferent stratigraphy, structure and metamorphism. The lower one is represented by the pre-Carboniferous (Devonian?)Vallecitos beds. These rocks have ...
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Christian Creixell,Miguel angel Parada,Diego Morata,Paulina Vasquez,Carlos Perez de Arce,Cesar Arriagada
Pág. 37 - 63
The Middle-Late Jurassic mafic dike swarms of central Chile between 33º and 33º45'S register the tectonic activity of the contemporaneous arc represented by the Coastal batholith. These dike swarms evidence alternate episodes of transtension and transpre...
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Juan A. Murra,Edgardo G. Baldo
Pág. 277 - 298
An important magmatic and tectonometamorphic activity of Early and Middle Ordovician age is registered in the pre-Andean basement of the Sierras Pampeanas of Argentina. These were linked to the development of a continental magmatic arc during the Famatin...
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Juan A. Dahlquist
Pág. 147 - 161
A petrological and geochemical study of Lower Ordovician epidote-bearing granitoids of the Sierra de Chepes (Famatinian Orogen, Sierras Pampeanas, Argentina) indicates low-pressure emplacement of these extensive metaluminous suites. Textural relationship...
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Hans-J. Gotze,Michael Schmitz,Peter Giese,Sabine Schmidt,Peter Wigger,Gerhard Schwarz,Manuel Araneda,Guillermo Chong,Jose Viramonte
Pág. 179 - 192
RESUMEN. Se presentan los resultados de investigaciones sismicas, magnetoteluricas y gravimetricas en bs Andes centrales australes (20-26°S) durante la decada de los 80. Los datos estructurales permiten deducir una fuerte asimetria en la litosfera del or...
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Constantino Mpodozis,Richard Allmendinger
Pág. 167 - 197
ABSTRACT. Large scale Cretaceous extensional tectonics in the Andes of northern Chile (Puquios-Sierra Fraga, 27°S). Extensional structures are commonly inferred, but seldom observed or described in the Andean Orogen. In the Andes of Northern Chile, the S...
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Ramon Moscoso,Constantino Mpodozis
Pág. 151 - 166
RESUMEN. En Chile, entre los 28° y 31°S, la cadena andina esta formada por dos provincias tectonicas con estilos estructurales distintos pero complementarios. La Cordillera Frontal (CF) esta dominada por la deformacion de basamento ('thick skinned'), ca...
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