{{Short description|Volcano in Chile}} {{Use dmy dates|date=December 2022}} {{coord|21|47|09|S|68|18|37|W|notes=<ref name=Tierney2011 />|display=intitle|name=Cerro Chanka|type:mountain}} '''Cerro Chanka''' (also known as Chanka or Pabellon) is a Pleistocene lava dome in the Andes. It is part of the Altiplano-Puna volcanic complex. Potassium-argon dating indicates that the dome last erupted 119.8±5.4 ka ago.<ref name=Tierney2011 /> Another reported age is 1.5±0.1 mya.<ref name=SilvaSelf1994 />
The dome is located on the northwestern side of Cerro del Azufre. It is constructed from three lobes with diameters of {{convert|1.5|km}}. The flanks of the dome are steep and talus and lava blocks lie at its feet.<ref name=Tierney2011 />
Cerro Chanka has a SiO<sub>2</sub> content of 66% and is of calc-alkaline origin. The lavas are potassium-rich dacitic and rhyolitic save for an andesitic mafic component, and rich in crystals.<ref name=Tierney2011 />
== See also ==
* Cerro Chao * Cerro Chascon-Runtu Jarita complex * Tocorpuri
== References == {{Reflist|refs= <ref name=Tierney2011>{{cite web |last1=Tierney |first1=Casey R. |title=Timescales of large silicic magma systems: implications from accessory minerals in Pleistocene lavas of the Altiplano-Puna Volcanic Complex, central Andes |url=http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/21754/TierneyCaseyR2011.pdf |website=ScholarsArchive@OSU |publisher=Oregon State University |accessdate=10 October 2015 |date=14 June 2011 |url-status=dead |archiveurl=https://web.archive.org/web/20151010140804/http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/21754/TierneyCaseyR2011.pdf |archivedate=10 October 2015}}</ref> <ref name=SilvaSelf1994>{{cite journal |last1=de Silva |first1=S. L. |last2=Self |first2=S. |last3=Francis |first3=P. W. |last4=Drake |first4=R. E. |last5=Carlos |first5=Ramirez R. |title=Effusive silicic volcanism in the Central Andes: The Chao dacite and other young lavas of the Altiplano-Puna Volcanic Complex |journal=Journal of Geophysical Research |date=1994 |volume=99 |issue=B9 |pages=17805 |doi=10.1029/94JB00652}}</ref>}}
Category:Pleistocene lava domes Category:Lava domes of Chile
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