French
DeutschChaco Basin
| Chaco Basin | |
|---|---|
| Cuenca Chaco, Cuenca Chaco Paranaense | |
  Location of the basin in South America | |
| Coordinates | 25°S 60°W / 25°S 60°W |
| Etymology | Chaco |
| Location | Central South America |
| Region | Gran Chaco Paraná Basin |
| Country |  Argentina Bolivia Paraguay |
| State(s) | Chaco, Formosa Chuquisaca, Santa Cruz, Tarija Alto Paraguay, Boquerón |
| Cities | Filadelfia |
| Characteristics | |
| On/Offshore | Onshore |
| Boundaries | Andes |
| Part of | Andean foreland basins |
| Hydrology | |
| River(s) | Paraguay, Paraná |
| Geology | |
| Basin type | Foreland basin |
| Orogeny | Andean |
| Age | Paleozoic-Holocene |
| Stratigraphy | Stratigraphy |
The Chaco Basin (Spanish: Cuenca Chaco, Spanish: Cuenca Chaco Paranaense or Spanish: Cuenca Chaco-Paraná) is a major sedimentary basin in Central South America around the borders of Argentina, Bolivia and Paraguay. The basin forms part of the larger Paraná Basin. Superficially, the Chaco Basin is an alluvial basin composed of land-derived (in contrast to marine sediments) material, mostly fine sand and clays of Paleogene, Neogene and Quaternary age. On deeper levels the Paraguayan Chaco is made up by four sub-basins, the Pirizal, Pilar, Carandaity and Curupaity basins.[1][2]
Stratigraphy[edit]
The basin is part of the megaregional Paraná Basin, of which it occupies its western portion. The basin is subdivided into the Western Chaco (Chaco Occidental) and Eastern Chaco (Chaco Oriental). The Paleozoic stratigraphy of the Chaco Basin comprises the Middle to Late Carboniferous Sachayoj Formation, the Late Carboniferous Charata Formation and the Early Permian Chacabuco Formation.[3] The Neogene cover contains the Late Miocene Paraná Formation,[4] the Late Pleistocene (Lujanian in the SALMA classification) Chaco Formation,[5][6] also described as Eocene to Miocene,[7] and the substratum-forming Fortín Tres Pozos Formation in the Formosa Province of northern Argentina.[8][9]
References[edit]
- ^ Zhang, Lei (1 September 2018). "Geological Conditions of Tight Gas in Chaco Basin". Proceedings of the 2nd Unconventional Resources Technology Conference. American Association of Petroleum Geologists. doi:10.15530/URTEC-2014-1921799. ISBN 978-0-9912144-1-9. Retrieved 1 September 2018.
- ^ "President Energy Finds Oil In Paraguay's Chaco Basin". Exploration & Production. Retrieved 1 September 2018.
- ^ Cuenca Chaco Paranense
- ^ Brea et al., 2013, p.28
- ^ Quebrada Agua Blanca at Fossilworks.org
- ^ Mapa Geológico del Paraguay, 1986, p.42
- ^ Filí, 2001, p.28
- ^ Zurita et al., 2009, p.279
- ^ Soibelzon et al., 2010, p.315
Bibliography[edit]
- Brea, Mariana; María Jimena Franco, and Alejandro F. Zucol. 2013. Paleoflora de la Formación Paraná (Mioceno Tardío), Cuenca Chaco-Paranaense, Argentina. El Neógeno de la Mesopotamia argentina, Asociación Paleontológica Argentina, Publicación Especial 14. 41–55. Accessed 2018-09-03.
- Filí, M.F. 2001. Síntesis Geológica e Hidrogeológica del noroeste de la provincia de Entre Ríos - República Argentina. Boletín Geológico y Minero 112. 25–36. Accessed 2018-09-03.
- Soibelzon, Leopoldo Héctor et al. 2010. Primer registro fósil de Procyon cancrivorus (G. Cuvier, 1798) (Carnivora, Procyonidae) en la Argentina. Revista Mexicana de Ciencias Geológicas 27. 313–319. Accessed 2018-09-03.
- Zurita, Alfredo Eduardo; Ángel Ramón Miño Boilini; Alfredo Armando Carlini; Martín Iriondo, and María Alejandra Alcaraz. 2009. Paleontología del Chaco Oriental. Una nueva localidad con mamíferos fósiles pleistocenos en el río Bermejo (Formosa, Argentina). Revista Mexicana de Ciencias Geológicas 26. 277–288. Accessed 2018-09-03. Archived 2018-09-04 at the Wayback Machine
- Various, Authors. 1986. Mapa Geológico del Paraguay - Proyecto PAR 86 - Escala 1:1,000,000 - Texto explicativo, 1–62. _. Accessed 2018-09-03.
Major South American geological features | |||||
|---|---|---|---|---|---|
| Tectonic plates |  | ||||
| Cratons and shields | |||||
| Structures undergoing subduction | |||||
| Faults and shear zones | |||||
| Rifts and grabens | |||||
| Sedimentary basins | |||||
| Orogenies | |||||
| Metallogenetic provinces | |||||
| Volcanism |
| ||||
Sedimentary basins of Argentina | ||
|---|---|---|
| Onshore & offshore |  | |
| Offshore | ||
| Sources | Álvarez Pontoriero, O.; Giménez, M.; Braitemberg, C.; Martínez, M.; Ruíz, F.; Introcaso, A.; Guspí, F. (2011). Principales cuencas sedimentarias de Argentina, interpretadas mediante Gravimetría Satelital. VIII Congreso de Exploración y Desarrollo de Hidrocarburos. pp. 13–20. Retrieved 2018-08-28. Mapa de cuencas sedimentarias (Map). YPF. p. 1. Retrieved 2018-08-28. | |
