Earth:Chillahuita
| Chillahuita | |
|---|---|
  Chillahuita Chile | |
| Highest point | |
| Elevation | 4,706 m (15,440 ft) [1] |
| Coordinates | [ ⚑ ] : 22°10′10″S 68°2′30″W / 22.16944°S 68.04167°W [1] |
| Geography | |
| Location | Antofagasta Region, Chile |
| Parent range | Andes |
| Geology | |
| Mountain type | Lava dome |
Chillahuita is a dacitic lava dome in northern Chile . It may have formed after the Pleistocene,[2] although argon-argon dating on amphibole has indicated an age of 370,000 ±40,000 years.[3] It has an altitude of about 4,750 metres (15,580 ft). It formed in a single non-explosive eruption.[4]
The flow moved northward and eastward from the vent over a terrain with slopes of 3-4°. The flow has a surface area of 11 square kilometres (4.2 sq mi) with a flat circular surface containing flow folds. Steep 200-metre (660 ft) high flanks limit the flow, which has a total volume of 4 cubic kilometres (0.96 cu mi). It is surrounded by a pumice deposit probably from the San Pedro volcano to the northwest.[4]
The eruption of the Chillahuita dome appears to have been controlled by local fault systems associated with the Altiplano-Puna volcanic complex, which also has geochemical similarity with Chillahuita lavas.[4]
See also
References
- ↑ 1.0 1.1 "Cerro del Leon: Synonyms & Subfeatures". Smithsonian Institution. https://volcano.si.edu/volcano.cfm?vn=355832.
- ↑ Guest, J. E.; Sánchez R, J. (September 1969). "A large dacitic lava flow in northern Chile". Bulletin Volcanologique 33 (3): 778–790. doi:10.1007/BF02596749. ISSN 1432-0819.
- ↑ Polanco, Edmundo; Clavero, Jorge; Giavelli, Aldo. "Geología de la cadena volcánica Paniri-Toconce, Zona Volcánica Central, Altiplano de la Región de Antofagasta, Chile" (in es). Santiago: SERNAGEOMIN. Archived from the original on 19 November 2015. https://web.archive.org/web/20151119140217/http://biblioserver.sernageomin.cl/opac/DataFiles/14127_pp_468_470.pdf. Retrieved 19 November 2015.
- ↑ 4.0 4.1 4.2 de Silva, S. L.; Self, S.; Francis, P. W.; Drake, R. E.; Carlos, Ramirez R. (1994). "Effusive silicic volcanism in the Central Andes: The Chao dacite and other young lavas of the Altiplano-Puna Volcanic Complex". Journal of Geophysical Research 99 (B9): 17805. doi:10.1029/94JB00652. http://pdfs.semanticscholar.org/fe7b/c96ba14629604e73c0cb9c6098b942bffb34.pdf.
External links
- "Chillahuita". Oregon State University. http://volcano.oregonstate.edu/oldroot/CVZ/chillahuita/index.html. Retrieved 19 November 2015.
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