Magallanes Basin

53°00′S 69°30′W / 53.000°S 69.500°W / -53.000; -69.500EtymologyStrait of Magellan
Austral = "south"LocationSouthern South AmericaRegionPatagoniaCountry Argentina
 ChileState(s)Santa Cruz Province
Aysén & Magallanes RegionsCitiesPunta Arenas
UshuaiaCharacteristicsOn/OffshoreBothBoundariesAndes, Río Chico-Dungeness HighPart ofAndean foreland basinsArea170,000–200,000 km2 (66,000–77,000 sq mi)HydrologySea(s)Southern Atlantic OceanRiver(s)Shehuén RiverLake(s)Viedma, Cardiel, Argentino, Pueyrredón, FontanaGeologyBasin typeForeland basinOrogenyAndeanAgeJurassic-HoloceneStratigraphyStratigraphyField(s)Chilean coal

The Magallanes Basin[A] or Austral Basin[B] is a major sedimentary basin in southern Patagonia. The basin covers a surface of about 170,000 to 200,000 square kilometres (66,000 to 77,000 sq mi) and has a NNW-SSE oriented shape.[1][2] The basin is bounded to the west by the Andes mountains and is separated from the Malvinas Basin to the east by the Río Chico-Dungeness High.[1] The basin evolved from being an extensional back-arc basin in the Mesozoic to being a compressional foreland basin in the Cenozoic.[3] Rocks within the basin are Jurassic in age and include the Cerro Toro Formation.[4] Three ages of the SALMA classification are defined in the basin; the Early Miocene Santacrucian from the Santa Cruz Formation and Friasian from the Río Frías Formation and the Pleistocene Ensenadan from the La Ensenada Formation.

The Magallanes Basin contains most of Chile's coal reserves dwarfing those found in the Arauco Basin or around Valdivia (e.g. Catamutún, Mulpún). Its coals are lignitic to sub-bituminous.[5]

Stratigraphy

Aysén Basin

The northwesternmost reaches of the basin form a sub-basin known as Aysén Basin or Río Mayo Embayment. From top to bottom the fill the basin is:[6]

Northwestern basin

In the Argentinian parts of the basin, the following formations have been registered from north to south:[7]

South-central basin

Tierra del Fuego

See also

Notes

  1. ^ Chiefly used in Chile[citation needed]
  2. ^ Mainly used in Argentina[citation needed]

References

  1. ^ a b Gallardo, Rocío E. (2014). "Seismic sequence stratigraphy of a foreland unit inthe [sic] Magallanes-Austral Basin, Dorado Riquelme Block, Chile: Implications for deep-marine reservoirs". Latin American Journal of Sedimentology and Basin Analysis (in Spanish). 1221 (1). Retrieved 7 December 2015.
  2. ^ "Cuenca Austral". Secretaría de Energía (in Spanish). Government of Argentina. Retrieved 30 November 2015. De una superficie total de 170.000 Km2, unos 23.000 Km2 pertenecen al área costa afuera.
  3. ^ Wilson, T.J. (1991). "Transition from back-arc to foreland basin development in the southernmost Andes: Stratigraphic record from the Ultima Esperanza District, Chile". Geological Society of America Bulletin. 103 (1): 98–111. Bibcode:1991GSAB..103...98W. doi:10.1130/0016-7606(1991)103<0098:tfbatf>2.3.co;2.
  4. ^ Fosdick, Julie C. (2007). Late Miocene Exhumation of the Magallanes Basin and sub-Andean fold belt, southern Chile: New constrains from apatite U-Th/He thermochronology. Geological Society of America, Denver Annual Meeting (28–31 October 2007) Paper No. 123-15. Denver.
  5. ^ Hackley, Paul C.; Warwick, Peter D.; Alfaro, Guillermo H.; Cuebas, Rosenelsy M. (2006). "World Coal Quality Inventory: Chile" (PDF). World Coal Quality Inventory: South America (Report). USGS. pp. 90–131. Retrieved February 23, 2017.
  6. ^ Demant, A.; Suárez, M.; de la Cruz, R.; Bruguier, O (2010). "Early Cretaceous Surtseyan volcanoes of the Baño Nuevo Volcanic Complex (Aysén Basin, Eastern Central Patagonian Cordillera, Chile)". Geologica Acta. 8 (2): 207–219. doi:10.1344/105.000001530 (inactive 2024-07-09).{{cite journal}}: CS1 maint: DOI inactive as of July 2024 (link)
  7. ^ Pérez Panera, 2010, p.52

Bibliography

Cretaceous
  • Pérez Panera, Juan Pablo (2010), Sistemática y bioestratigrafía de los nanofósiles calcáreos del Cretácico del sudeste de la Cuenca Austral, Santa Cruz, Argentina (PhD thesis), Universidad Nacional de La Plata, pp. 1–450
Neogene
  • Abello, María Alejandra; Rubilar Rogers, David (2012), "Revisión del género Abderites Ameghino, 1887 (Marsupialia, Paucituberculata)", Ameghiniana, 49 (2): 164–184, doi:10.5710/AMGH.v49i2(408), retrieved 2019-02-15
  • Arnal, M.; Vucetich, M.G. (2015), "Revision of the fossil rodent Acaremys Ameghino, 1887 (Hystricognathi, Octodontoidea, Acaremyidae) from the Miocene of Patagonia (Argentina) and the description of a new acaremyid", Historical Biology: An International Journal of Paleobiology, 27 (1): 42–59, retrieved 2019-02-13
  • Bellosi, Eduardo S. (2014), Ambientes asociados a la fauna Friasense (Mioceno Medio) en Alto río Cisnes (Aysén, Chile), XIV Reuñión Argentina de Sedimentología, pp. 40–41, retrieved 2018-09-10
  • Bostelmann, J.E. (2012), The Alto Río Cisnes Fossil Fauna (Río Frías Formation, Early-Middle Miocene, Friasian SALMA): A keystone and paradigmatic vertebrate assemblage of the South American Fossil Record, III Simposio Paleontología en Chile, pp. 44–45, retrieved 2018-09-10
  • Dal Molín, C.N.; Colombo, F. (2003), "Sedimentación neógena en la Cuenca del Río Zeballos y del Río Jeinemeni (47° Latitud Sur) Antepaís patagónico Argentina" (PDF), Geogaceta, 34: 139–142, retrieved 2018-09-10
  • Góis, Flávio; González Ruiz, Laureano Raúl; Scillato Yané, Gustavo Juan; Soibelzon, Esteban (2015), "A Peculiar New Pampatheriidae (Mammalia: Xenarthra: Cingulata) from the Pleistocene of Argentina and Comments on Pampatheriidae Diversity", PLoS ONE, 10 (6): e0128296, Bibcode:2015PLoSO..1028296G, doi:10.1371/journal.pone.0128296, hdl:11336/82694, PMC 4470999, PMID 26083486
  • Kramarz, Alejandro G.; Bond, Mariano (2005), "Los Litopterna (Mammalia) de la Formación Pinturas, Mioceno Temprano-Medio de Patagonia", Ameghiniana, 42: 611–625, retrieved 2017-08-15
  • Kramarz, Alejandro G (2001), Estudio de la fauna de roedores de la Formación Pinturas, Mioceno medio inferior de la Provincia de Santa Cruz (PhD thesis) (PDF), Universidad de Buenos Aires, pp. 1–300, retrieved 2017-08-15
  • Le Roux, Jacobus P.; Puratich, Jacqueline; Mourgues, F. Amaro; Oyarzún, José Luis; Otero, Rodrigo A.; Torres, Teresa; Hervé, Francisco (2010), "Estuary deposits in the Río Baguales Formation (Chattian-Aquitanean), Magallanes Province, Chile" (PDF), Andean Geology, 37: 329–344, retrieved 2017-10-25
  • Marshall, Larry G. (1990), "Fossil Marsupialia from the type Friasian land mammal age (Miocene), Alto Río Cisnes, Aisén, Chile", Revista Geológica de Chile, 17: 19–55, retrieved 2017-10-21
  • Marshall, Larry G.; Salinas, Patricia (1990), "Stratigraphy of the Río Frías Formation (Miocene) along the Alto Río Cisnes, Aisén, Chile", Revista Geológica de Chile, 17: 57–87, retrieved 2017-10-21
  • Náñez, Carolina; Quattrocchio, Mirta E.; Ruiz, Liliana (2009), "Palinología y micropaleontología de las Formaciones San Julián y Monte León (Oligoceno - Mioceno temprano) en el subsuelo de cabo Curioso, provincia de Santa Cruz, Argentina", Ameghiniana, 46: 669–693, retrieved 2017-08-15
  • Picasso, Mariana B.J.; Degrange, Federico J. (2009), "El género Nothura (Aves, Tinamidae) en el Pleistoceno (Formación Ensenada) de la provincia de Buenos Aires, Argentina", Revista Mexicana de Ciencias Geológicas, 26: 428–432, retrieved 2018-09-10
  • Tonni, E.P. (1999), "The Ensenada and Buenos Aires formations (Pleistocene) in a quarry near La Plata, Argentina" (PDF), Journal of South American Earth Sciences, 12 (3): 273–291, Bibcode:1999JSAES..12..273T, doi:10.1016/S0895-9811(99)00021-8, retrieved 2018-09-10
  • Verzi, Diego H.; Olivares, A. Itatí; Morgan, Cecilia C. (2017), "Systematics and evolutionary significance of the small Abrocomidae from the early Miocene of southern South America", Historical Biology: An International Journal of Paleobiology, 29 (3): 411–422, Bibcode:2017HBio...29..411V, doi:10.1080/08912963.2016.1168410, retrieved 2019-02-12
  • {{citation |last1=Vizcaíno |first1=Sergio F. |last2=Kay |first2=Richard F. |last3=Bargo |first3=Susana |year=2012 |title=Early Miocene Paleobiology in Patagonia: High-Latitude Paleocommunities of the Santa Cruz Formation |url=https://books.google.com/books?id=3Ce0uINITb4C |publisher=[[Cambridge University|Cambridge University Press |isbn=9780521194617 |pages=1–370 |accessdate=2017-10-21}}

Further reading

  • Bally, A.W.; Snelson, S. (1980), "Realms of subsidence", Canadian Society for Petroleum Geology Memoir, 6: 9–94
  • Kingston, D.R.; Dishroon, C.P.; Williams, P.A. (1983), "Global Basin Classification System" (PDF), AAPG Bulletin, 67: 2175–2193, retrieved 2017-06-23
  • Klemme, H.D (1980), "Petroleum Basins - Classifications and Characteristics", Journal of Petroleum Geology, 3 (2): 187–207, Bibcode:1980JPetG...3..187K, doi:10.1111/j.1747-5457.1980.tb00982.x
  • Moreno, Teresa; Gibbons, Wes (2006), Geology of Chile (PDF), Geological Society of London, pp. 1–396, ISBN 9781862392199, retrieved 2018-09-06
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Major South American geological features
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Sedimentary basins of Argentina
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Magallanes Basin is located in Argentina
Offshore
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  • Colorado Marina Basin
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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.
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