Sedimentary basin in Patagonia, South America
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]
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]
In the Argentinian parts of the basin, the following formations have been registered from north to south:[ 7]
South-central basin [ edit ]
^ 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 .
^ "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.
^ 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 .
^ 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.
^ 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 .
^ 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 )
^ Pérez Panera, 2010, p.52
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 , hdl :11336/56470 , retrieved 2019-02-12
Vizcaíno, Sergio F.; Kay, Richard F.; Bargo, Susana (2012), Early Miocene Paleobiology in Patagonia: High-Latitude Paleocommunities of the Santa Cruz Formation , Cambridge University Press, pp. 1–370, ISBN 9780521194617 , retrieved 2017-10-21
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
Sedimentary basins of Argentina
Onshore & offshore
Offshore Sources