Salta Basin
Salta Basin | |
---|---|
Cuenca Salta | |
Coordinates | 23°40′S 66°07′W / 23.667°S 66.117°W |
Etymology | Salta Province |
Region | Argentine Northwest |
Country | ![]() ![]() ![]() |
State(s) | Salta, Jujuy, Tucumán Potosí Antofagasta |
Cities | Salta |
Characteristics | |
On/Offshore | Onshore |
Boundaries | Andes |
Part of | Andean foreland basins |
Geology | |
Basin type | Foreland-on-rift basin or intracontinental rift basin |
Plate | South American |
Orogeny | Andean |
Age | Neocomian-Neogene |
Stratigraphy | Stratigraphy |
Salta Basin or Salta Rift Basin is a sedimentary basin located in the Argentine Northwest.[1][2] The basin started to accumulate sediments in the Early Cretaceous (Neocomian) and at present it has sedimentary deposits reaching thicknesses of 5,000 metres (16,000 ft). The basin contains seven sub-basins: Tres Cruces, Lomas de Olmedo, Metán, Alemanía, Salfity, El Rey, Sey and Brealito. The basin environment has variously been described as a "foreland rift" and an "intra-continental rift". The basin developed under conditions of extensional tectonics and rift-associated volcanism.[1]
Description
The basin basement is composed of rocks belonging to the Puncoviscana Formation.[2] The volcanism that began in the Late Jurassic was initially of subalkaline character (low sodium and potassium content), but turned increasingly alkaline in the Early Cretaceous.[1]
The rifts of Salta Basin developed in a time of generalized extensional tectonics along western South America.[3] It has been proposed that the Salar de Atacama depression in Chile was once a westward rift arm of the Salta Basin.[4]
Stratigraphy
Age | Group | Subgroup | Formation | Lithologies | Basin stage | Notes |
---|---|---|---|---|---|---|
Pliocene | Payogastilla | San Felipe | Conglomerates | Foreland | [5] | |
Huayquerian | Jujuy | Piquete | [6][7] | |||
Huayquerian | Guanaco Sonso | [8] | ||||
Montehermosan | Palo Pintado | [9] | ||||
Chasicoan | ||||||
Laventan | Angastaco | [10][11] | ||||
Friasian | ||||||
Friasian | Metán | Jesús María | [11] | |||
Friasian | Anta | [11] | ||||
Early Miocene | Río Seco | [11] | ||||
Priabonian | Los Colorados | [11] | ||||
Casamayoran | Quebrada de los Colorados | [10] | ||||
Salta | Santa Bárbara | Lumbrera | Late post-rift | [12][13] | ||
Lutetian | ||||||
Itaboraian | Maíz Gordo | [12][14] | ||||
Thanetian | ||||||
Peligran | Mealla | Sandstones, siltstones, conglomerates, paleosols | [12][15] | |||
Selandian | Balbuena | Tunal | Early post-rift | [12] | ||
Danian | Olmedo | [12] | ||||
Yacoraite | Sandstones, limestones | [12] | ||||
Maastrichtian | ||||||
early Maastrichtian | Lecho | Sandstones | [12] | |||
Campanian | Pirgua | Los Blanquitos | Sandstones | Late synrift | [12] | |
Las Curtiembres | Early synrift | [12] | ||||
Santonian | ||||||
Coniacian | ||||||
Turonian | ||||||
Cenomanian | Isonza | Basalt | [12] | |||
Albian | La Yesera | [12] | ||||
Aptian |
References
- ^ a b c Marquillas et al., 2005
- ^ a b Grier et al., 1991
- ^ Ramos, 2009
- ^ Reutter et al., 2006
- ^ Galli et al., 2019, p.380
- ^ González & Abascal, 2012
- ^ Galli et al., 2019, p.369
- ^ López Rodríguez, 2018
- ^ Galli et al., 2011
- ^ a b Del Papa et al., 2013
- ^ a b c d e Galli & Hernández, 1999, p.171
- ^ a b c d e f g h i j k Marquillas et al., 2005, p.96
- ^ Del Papa, 2006
- ^ Narváez, 2009
- ^ Sánchez & Marquillas, 2010
Bibliography
- General
- Template:Cite LSA
- Template:Cite LSA doi:10.1144/SP327.3
- Reutter, Klaus-J.; Charrier, Reynaldo; Götze, Hans-J.; Schurr, Bernd; Wigger, Peter; Scheuber, Ekkehard; Giese, Peter; Reuther, Claus-Dieter; Schmidt, Sabine; Rietbrock, Andreas; Chong, Guillermo; Belmonte-Pool, Arturo (2006). "The Salar de Atacama Basin: a Subsiding Block within the Western Edge of the Altiplano-Puna Plateau". In Oncken, Onno; Chong, Guillermo; Franz, Gerhard; Giese, Peter; Götze, Hans-Jürgen; Ramos, Víctor A.; Strecker, Manfred R.; Wigger, Peter (eds.). The Andes: Active Subduction Orogeny. pp. 303–325. ISBN 978-3-540-24329-8.
- Template:Cite LSA doi:10.1007/s00531-004-0443-2 Bibcode:2005IJEaS..94...94M
- Template:Cite LSA
- Template:Cite LSA doi:10.1016/0895-9811(91)90007-8 Bibcode:1991JSAES...4..351G
- Guanaco Sonso Formation
- Lumbrera Formation
- Maíz Gordo Formation
- Mealla Formation
- Palo Pintado Formation
- Piquete Formation
- Quebrada de Los Colorados Formation