Cuyo Basin

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Not to be confused with Cuyania.
Cuyo Basin
Cuenca Cuyana
Field(s)
Tupungato

Cuyo Basin (Spanish: Cuenca Cuyana) is a sedimentary basin in Mendoza Province, western Argentina. The Cuyo Basin has a NNW-SSE elongated shape and is limited to the west by the Sierra Pintada System and to the east by the Pampean pericraton. To the north the basin reaches the area around the city of Mendoza.[1]

Description

The Cuyo Basin has an approximate area of 30,000 square kilometres (12,000 sq mi).[2] It has two major sub-basins: Cacheuta (Spanish: Subcuenca Cacheuta) in the north and Alvear (Spanish: Subcuenca Alvear) in the south. The northern fringes of Cacheuta sub-basin reaches into San Juan Province. The basin existed already during the Triassic but its current shape is derivative of the Andean orogeny.[1]

The basin originated as a rift basin in the context of extensional tectonics and crustal thinning that followed the Paleozoic Gondwanide orogeny.[note 1]

Stratigraphy

The stratigraphy of the Cuyo Basin comprises the following formations:

Age
bold is SALMA type		 Group Formation Lithologies Depositional environment Notes
Pleistocene Tunuyán [4]
Mio-Pliocene
Huayquerian		 Huayquerías Mudstones, sandstones, tuff
Fluvial
 [5]
Miocene Mogotes Alluvial [6]
Miocene La Pilona Shales and sandstones Alluvial [6]
Middle Miocene
Laventan		 Mariño Sandstones Alluvial and eolian [6]
Late Oligocene
Deseadan
Early Oligocene
 Hiatus [6]
Priabonian
Bartonian
Divisaderan		 Divisadero Largo Fluvial [6]
Lutetian Papagayos Fluvial [6]
Early Eocene
 Hiatus [6]
Paleocene
Late Cretaceous
Early Cretaceous Punta de las Bardas Basalts Volcanic [6]
Late Jurassic
Barrancas Sandstones and conglomerates Alluvial to fluvial [6]
Rhaetian Uspallata Río Blanco Fluvial-deltaic [6][3]
Norian
Carnian Cacheuta Black shales Lacustrine [6][7]
Potrerillos Tuffs, conglomerates, sandstones, shales Alluvial to fluvial [6][7][8]
Ladinian Cerro de las Cabras Mudstones and conglomerates [6][7]
Anisian
Olenekian Río Mendoza Volcaniclastic conglomerates [6][7]
Induan
Late Permian
 Choiyoi Group [3]
Carboniferous Hiatus [9][10]
Devonian
Early Paleozoic Cuyania [9][10]

See also

Notes and references

Notes

  1. ^ These tectonics are not related to the break-up of Gondwana later in the Mesozoic.[3]

References

  1. ^ a b "Cuenca Cuyana". Secretaría de Energía (in Spanish). Government of Argentina. Retrieved 30 November 2015.
  2. ^ Zencich et al., 2008, p.110
  3. ^ a b c Spalletti et al., 2008, p.270
  4. ^ Yrigoyen, 1993
  5. ^ Garrido et al, 2017, p.51
  6. ^ a b c d e f g h i j k l m n Zencich et al., 2008, p.112
  7. ^ a b c d Spalletti et al., 2008, p.269
  8. ^ Spalletti et al., 2005
  9. ^ a b Finney, 2007
  10. ^ a b Keller et al., 1998

Bibliography

General
Divisadero Largo Formation
  • Bulletin of the Museum of Comparative Zoology
    127. 239–293. Accessed 2019-02-15.
Huayquerías Formation
Mariño Formation

Further reading

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