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Unconfirmed historical eruptions are suspected to have occurred in 1865–1867. The last activity has been reported of low-intensity seismicity accompanied with fumarolic activity in
November 1989 and March 1990 intense degassing. In 2010, there a campaign conducted seismic activity showing 3 potencial
406:
Clavero J., Soler V., Amigo A. 2006. CaracterizaciĂłn preliminar de la actividad sĂsmica y de desgasificaciĂłn pasiva de volcanes activos de Los Andes
Centrales del Norte de Chile. XI Congreso GeolĂłgico Chileno, Actas II, 443-446
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in composition, with lava flows extending several kilometres north of the peak. The only activity from the ridge during historical times was a flank eruption from 1865 to 1867. The exact source of this eruption is unclear.
299:, while others suggest to be much older with the appearance of the edifices volcanic activity migrated east over time. There is also evidence that glaciers were on the volcano in the late Pleistocene. The
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S and hydrocarbons. The carbon/sulfur ratios are high and the isotopic values suggest the mixture between magmatic, hydrothermal, and atmospheric fluids. Other techniques used to measure the amount of SO
417:
Aguilera, Felipe; Layana, Susana; Rojas, Felipe; Arratia, Pilar; Wilkes, Thomas C.; González, Cristóbal; Inostroza, Manuel; McGonigle, Andrew J.S.; Pering, Tom D.; Ureta, Gabriel (2020-07-02).
468:"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"
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field is about 0.1 km and the emissions measured in situ at the crater show a highly mixed magmatic system between high temperature temperature gasses and hydrothermal fluids.
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Pritchard, M.E.; Henderson, S.T.; Jay, J.A.; Soler, V.; Krzesni, D.A.; Button, N.E.; Welch, M.D.; Semple, A.G.; Glass, B.; Sunagua, M.; Minaya, E. (June 2014).
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Different information exists regarding the activity and activity migration of Olca. There is a study dating two flows, which suggest a formation during the
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521:"Reconnaissance earthquake studies at nine volcanic areas of the central Andes with coincident satellite thermal and InSAR observations"
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376:"Gas discharges from four remote volcanoes in northern Chile (Putana, Olca, Irruputuncu and Alitar): a geochemical survey"
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419:"First Measurements of Gas Flux with a Low-Cost Smartphone Sensor-Based UV Camera on the Volcanoes of Northern Chile"
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352:"Geothermal Exploration at Irruputuncu and Olca Volcanoes: Pursuing a Sustainable Mining Development in Chile"
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Worner, Gerhard; Hammerschmidt, Konrad; Henjes-Kunst, Friedhelm; Lezaun, Judith; Wilke, Hans.
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Franco Tassi; Felipe
Aguilera; Orlando Vaselli; Thomas Darrah; Eduardo Medina (2011-06-30).
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Olca volcanic dome with the fumarole, picture taken from the south looking at the plume.
216:. It lies in the middle of a 15 km long ridge composed of several stratovolcanos.
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559:"Global Volcanism Program | Report on Olca-Paruma (Chile-Bolivia) — March 1990"
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field over at the crater's dome for at least 60 years. The
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The gas composition indicates low concentration of H
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525:Journal of Volcanology and Geothermal Research
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281:Differential Optical Absorption Spectroscopy
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356:Geothermal Resources Council Transactions
224:to the east. It is also close to the pre-
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571:10.5479/si.gvp.bgvn199003-355050
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137:San Pedro de Quemes Municipality
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639:Volcanoes of Antofagasta Region
649:Volcanoes of PotosĂ Department
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256:at the base and a persistent
244:Gas emissions and composition
43:5,407 m (17,740 ft)
326:List of volcanoes in Bolivia
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669:Pleistocene stratovolcanoes
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472:Revista GeolĂłgica de Chile
331:List of volcanoes in Chile
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674:Holocene stratovolcanoes
634:Stratovolcanoes of Chile
600:Global Volcanism Program
605:Smithsonian Institution
497:volcano.oregonstate.edu
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654:Polygenetic volcanoes
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220:lies to the west and
71:20.93333°S 68.48333°W
659:Bolivia–Chile border
644:Subduction volcanoes
380:Annals of Geophysics
76:-20.93333; -68.48333
537:2014JVGR..280...90P
493:"Olca & Paruma"
435:2020RemS...12.2122A
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149:Antofagasta Region
133:Nor LĂpez Province
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229:Cerro Paruma
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161:Parent range
297:Pleistocene
141:Cana Canton
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49:Coordinates
628:Categories
576:2021-12-10
531:: 90–103.
502:2021-12-10
478:: 205–240.
337:References
453:2072-4292
407:(Spanish)
262:fumarolic
233:andesitic
87:Geography
62:68°29′0″W
59:20°56′0″S
39:Elevation
315:See also
258:fumarole
231:. It is
226:Holocene
125:Location
588:Sources
533:Bibcode
431:Bibcode
321:OllagĂĽe
237:dacitic
214:Bolivia
173:Geology
129:Bolivia
451:
254:spring
250:gasses
222:Paruma
386:(2).
358:: 35.
210:Chile
204:is a
167:Andes
145:Chile
449:ISSN
248:The
235:and
212:and
202:Olca
195:1867
112:Olca
19:Olca
567:doi
541:doi
529:280
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