Lupica Formation (Spanish: Formación Lupica) is a volcano-sedimentary geological formation in the Andes of Arica y Parinacota Region in northernmost Chile. There have been differing views on the relative age and stratigraphy of Lupica Formation, to some authors, it is an eastern equivalent of the Miocene Oxaya Formation,[1] yet others consider it is an older formation that underlies part of the Oxaya Formation.[2] According to Wotzlaw and co-workers the lower part of the formation originated from a nearby volcanic arc that existed in the Eocene.[3]
| Lupica Formation | |
|---|---|
Stratigraphic range: | |
| Underlies | Chucal Formation, Oxaya Formation? |
| Overlies | Belén Metamorphic Complex |
| Lithology | |
| Primary | Tuff, volcanic breccia, sedimentary breccia, fluvial conglomerate, andesite, dacite, fluvial sandstone |
| Location | |
| Region | Arica y Parinacota Region |
| Country | Chile |
Azapa Formation contain clasts that possibly derive from Lupica Formation.[2]
References
edit- ^ Charrier, Reynaldo; Chávez, Álvaro N.; Elgueta, Sara; Hérail, Gérard; Flynn, John J.; Croft, Darin A.; Wyss, André R.; Riquelme, Rodrigo; García, Marcelo (2005). "Rapid tectonic and paleogeographic evolution associated with the development of the Chucal anticline and the Chucal-Lauca Basin in the Altiplano of Arica, northern Chile". Journal of South American Earth Sciences. 19 (1): 35–54. Bibcode:2005JSAES..19...35C. doi:10.1016/j.jsames.2004.06.008.
- ^ a b Wörner, Gerhard; Hammerschmidt, Konrad; Henjes-Kunst, Friedhelm; Lezaun, Judith; Wilke, Hans (2000-12-01). "Geochronology (40Ar/39Ar, K-Ar and He-exposure ages) of Cenozoic magmatic rocks from Northern Chile (18-22°S): implications for magmatism and tectonic evolution of the central Andes". Revista Geológica de Chile. 27 (2): 205–240.
- ^ Wotzlaw, Jörn F.; Decou, Audrey; von Eynatten, Hilmar; Wörner, Gerhard; Frei, Dirk (2011). "Jurassic to Palaeogene tectono-magmatic evolution of northern Chile and adjacent Bolivia from detrital zircon U-Pb geochronology and heavy mineral provenance". Terra Nova. 23 (6): 399–406. doi:10.1111/j.1365-3121.2011.01025.x. S2CID 131560137.