Moquegua Basin

Moquegua Basin
Cuenca Moquegua
Coordinates	16°48′S70°48′W / 16.800°S 70.800°W / -16.800; -70.800
Etymology	City of Moquegua, Peru
Location	Western South America
Country	Peru
State(s)	Department of Moquegua
Cities	Moquegua
Characteristics
On/Offshore	Onshore
Part of	Circum-Pacific forearc basins
Hydrology
Sea(s)	Eastern Pacific Ocean
River(s)	Osmore River
Geology
Basin type	Forearc basin
Orogeny	Andean
Age	Cenozoic

Moquegua Basin is a sedimentary basin in southernmost Peru. Sedimentary rocks of the basin, including those of Moquegua Group, ^[1] crop out in the Central Depression makes up part of the sedimentary fill of the basin. ^[2] The basement of the basin is made of rocks older than the Cenozoic. ^[2]

Despite being close to the Pacific Ocean Moquegua Basin appear to have been unaffected by the Oligo-Miocene marine transgression that affected many other basins of western South America such as nearby Pisco Basin. ^[3] Concurrent with Andean uplift it is thought that the basin went from having a “balanced basin-fill” between Oligocene and Middle Miocene having a “overfilled basin-fill” from the Middle Miocene to the present. ^[1]

References

1. Alván, Aldo; Ramírez, Katerine; von Eynatten, Hilmar; Dunkl, István; Jacay, Javier; Bertone, Gabriela (2017). "Evolución Geológica de las Cuencas de Antearco del Sur de Perú (Moquegua y Camaná-Mollendo): Proveniencia Sedimentaria y Análisis de Facies en Rocas Cenozoicas". Boletín de la Sociedad Geológica del Perú (in Spanish). 112: 053–077.
2. Salazar, Esteban; Bustamante, Yacory F.; Sánchez, Elvis A.; Mamani, Mirian I. (2020). "Arquitectura estratigráfica, paleogeografía y proveniencia sedimentaria de las rocas cenozoicas del sur de Perú (Tacna, 18° S)". Andean Geology . 47 (2). National Geology and Mining Service: 351–383. doi: 10.5027/andgeoV47n2-3131 .
3. Macharé, José; Devries, Thomas; Barron, John; Fourtanier, Élisabeth (1988). "Oligo-Miocene transgression along the Pacifie margin of South America: new paleontological and geological evidence from the Pisco basin (Peru)" (PDF). Geódynamique . 3 (1–2): 25–37. Retrieved 2020-03-09.