Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: the Sauce Grande basin–Ventana foldbelt (Argentina) and Karoo basin–Cape foldbelt (South Africa) revisited

Abstract

As integral parts of du Toit's (

Complete recycling of a magmatic arc: evidence from chemical and isotopic composition of Quaternary trench sediments in Chile (36°–40°S)

“…The eastern series comprises non-metamorphic to medium grade (meta)sedimentary rocks whereas high P metamorphism and metabasites are generally absent. The depositional age of these sediments is not well constrained, but they belong to Devonian-Carboniferous-Permian sedimentary basins along the western margin of Gondwana (González Bonorino 1991;França et al 1995;López-Gamundi and Rossello 1998;Bandel and Quinzio-Sinn 1999). In contrast to the accretionary wedge of the Coastal Cordillera, Devonian metasedimentary rocks of the eastern foothills of the Main Cordillera are of the high-T, medium-P type (Lucassen et al 2004).…”

The Whitehill Formation a high conductivity marker horizon in the Karoo Basin

“…With a sediment provenance in the cratonic hinterland to the north, deposition of these sequences was on a horizontal shelf within a brackish, shallow sea of depths between 50-150 m (Cole and McLachlan, 1994). At this time the Karoo Basin extended into South America where the Prince Albert and Whitehill Formation are known as the Piedra Azul and Irati Formations, respectively (Lopez-Gamudi and Rossello, 1998).…”

La Dorsal Asunción - Río Grande: Un Altofondo Regional Entre Las Cuencas Paraná (Brasil, Paraguay Y Uruguay) Y Chacoparanaense (Argentina)

“…La elaborac ion de la informacion cstructural y las intcrpretac iones tecto nicas real izada s perm iten reconoce r en la Cuenca Norte de Uruguay la existcncia de una tect6ni ca pa leozoi ea tardia de tipo co mprcs iona l, tal co mo ocurre en las Sierras Australes de Bueno s Aires (Cob bold et at., 199 1;Rossello et at.. 1997; Lopcz-Garnu ndi & Rosscl lo, 199 7). Ademas, so n co ncomitantes co n la depositacion del G rupo Pillahuin co ( Lopez-Gamundi el al., 1995 ) y otras unidades litocstratigraficas contemponineas preservadas en algunas porciones de l subsuelo de la llanura Chacopampcana de Argentina (Che bli et al, 1999).…”