Chiliques

Chiliques is a stratovolcano located in the Antofagasta Region of Chile.[1]

Chiliques
Volcano in Chile
The Chiliques volcano, seen from Laguna Miscanti
Highest point
Elevation5,778 m (18,957 ft)
Coordinates23°35′0″S 67°42′0″W 
Geography
LocationChile
Parent rangeAndes
Geology
Mountain typeStratovolcano
Last eruptionUnknown

Chiliques is capped off by a 500 metres (1,600 ft) wide summit crater, which contains two crater lakes. One of these lakes is found in the northern part and the other east-southeastern part.[2] The volcano is formed by rocks ranging from andesite to dacite; the andesites of the main stratocone building phase contain pyroxene.[3] Together with Tumisa, Leija and Cordón de Puntas Negras it forms a northwest-trending volcano alignment.[4]

The first part of Chiliques to form was a block lava field, which still crops out northeast of the main volcano to a distance of 6.5 kilometres (4.0 mi). Lava flows with lengths of up to 10 kilometres (6.2 mi) then constructed the stratovolcano proper and were later buried by shorter (up to 5 kilometres (3.1 mi)) lava flows that cover a surface of 16.26 square kilometres (6.28 sq mi) around the summit crater. The Cerro Overo maar northeast of Chiliques is occasionally considered the last phase of Chiliques's activity, and the two have erupted rocks with similar chemical composition.[3] There is no evidence for historical activity.[2]

Over years, Chiliques has been monitored from space by ASTER imagery.[5] In 2002, the imagery showed evidence of a temperature anomaly on Chiliques, which occasionally reached a scale of 15 °C (27 °F). This temperature anomaly may reflect either thermal events in crater lakes or fumarolic activity, although evidence for the occurrence of either is equivocal.[5] Some of the anomalies were observed in the crater and others on the upper slopes of the volcano.[2] This anomaly lasted only a few months.[5]

Magnetotelluric investigation of the region has shown evidence of a high-conductivity structure underground between Chiliques, Cordón de Puntas Negras and Láscar. This high conductivity zone reaches a depth of 6 kilometres (3.7 mi) at its southern end, and it might reflect the presence of magma underground.[6]

The lake Laguna Lejia lies north of Chiliques volcano,[7] other parts of the volcano drain into the Salar de Atacama; the volcano forms part of the drainage divide of the salar.[8] A pre-modern route goes up the mountain and aside from the steep slopes and height of the mountain, does not feature any major difficulties.[1]

The town of Socaire is found west of Chiliques, and the volcano has cultural importance to the town, with the volcano being considered the origin of the water for Socaire and part of a cosmological representation together with the neighbouring mountains Tumisa, Lausa, Ipira and Miñiques.[9] Seen from Socaire, the sun rises behind Chiliques during St. Bartholomew's Day; St. Bartholomew is an important saint for the town.[1] Archeological findings made on Chiliques include pottery, a stone room and an elliptical structure in the summit area. Additional platforms and stone structures are found lower on its slopes, and an Incan tambo even farther down.[9] Such archeological sites on mountains are common in Chile, with Licancabur and Cerro Quimal being examples of other mountains with such structures.[1]

References
  1. Moyano, Ricardo; Uribe, Carlos (2012). "El volcán Chiliques y el 'morar-en-elmundo' de una comunidad atacameña del norte de Chile". Estudios Atacameños (43): 187–208. doi:10.4067/S0718-10432012000100010. ISSN 0718-1043.
  2. Pieri, D; Abrams, M (2004-07-15). "ASTER watches the world's volcanoes: a new paradigm for volcanological observations from orbit". Journal of Volcanology and Geothermal Research. Volcanic Observations from Space: New Results from the EOS Satellite Instruments. 135 (1–2): 24–26. doi:10.1016/j.jvolgeores.2003.12.018.
  3. Ureta, Gabriel. "Caracterización geológica y geoquímica del maar Cerro Overo, Andes Centrales" (PDF). biblioserver.sernageomin.cl (in Spanish). SERNAGEOMIN.
  4. Zeil, Werner (December 1964). "Die Verbreitung des jungen Vulkanismus in der Hochkordillere Nordchiles". Geologische Rundschau (in German). 53 (2): 750. doi:10.1007/BF02054561. ISSN 0016-7835.
  5. Jay, J. A.; Welch, M.; Pritchard, M. E.; Mares, P. J.; Mnich, M. E.; Melkonian, A. K.; Aguilera, F.; Naranjo, J. A.; Sunagua, M. (2013-03-04). "Volcanic hotspots of the central and southern Andes as seen from space by ASTER and MODVOLC between the years 2000 and 2010". Geological Society, London, Special Publications. 380 (1): 162–179. doi:10.1144/SP380.1. ISSN 0305-8719.
  6. Díaz, Daniel; Brasse, Heinrich; Ticona, Faustino (March 2012). "Conductivity distribution beneath Lascar volcano (Northern Chile) and the Puna, inferred from magnetotelluric data". Journal of Volcanology and Geothermal Research. 217: 27–28. doi:10.1016/j.jvolgeores.2011.12.007.
  7. Muñoz-Pedreros, Andrés; Ríos, Patricio De los; Möller, Patricia (2013). "Zooplankton in Laguna Lejía, a high-altitude Andean shallow lake of the Puna in northern Chile". Crustaceana. 86 (13–14): 1634–1643. doi:10.1163/15685403-00003265. ISSN 1568-5403 – via http://ceachile.cl/humedales/cdn/Lejia.pdf.
  8. Muñoz, Santiago (1894). Jeografía descriptiva de las provincias de Atacama i Antofagasta (in Spanish). Santiago de Chile : Impr. Gutenberg. pp. 27.
  9. Moyano, Ricardo (January 2011). "Sub-tropical astronomy in the southern Andes: the ceque system in Socaire, Atacama, northern Chile". Proceedings of the International Astronomical Union. 7 (S278): 93–103. doi:10.1017/s1743921311012518. ISSN 1743-9221.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.