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  • Chile-Bolivia
  • South America
  • Stratovolcano
  • Unknown - Uncertain Evidence
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 21.3°S
  • 68.18°W

  • 5868 m
    19247 ft

  • 355060
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Ollague.

The Global Volcanism Program has no Weekly Reports available for Ollague.

The Global Volcanism Program has no Bulletin Reports available for Ollague.

Geological Background

Volcán Ollagüe, also known as Oyahué, is a massive andesitic stratovolcano with a summit dacitic lava dome. A large Pleistocene debris-avalanche deposit extending westward separates the Salar de San Martín from the Salar de Ollagüe. Three youthful-looking silicic lava flows mark late post-collapse eruptions, but show evidence of glaciation and are thought to pre-date the last glacial advance at about 11,000 years ago (Freeley et al., 1993). A youthful-looking scoria cone on the lower WSW flank, La Poruñita, was initially considered to be of Holocene age (González-Ferrán, 1995), however Wörner et al. (2000) later obtained Potassium-Argon dates of 420,000 to 680,000 years. Active sulfur mines on the upper western and southern flanks of Ollagüe are reached by a road that climbs to about 5500 m elevation. No historical eruptions have been recorded from Ollagüe; activity has been restricted to periods of intense fumarolic activity, and a persistent steam plume emanates from a fumarole on the south side of the summit dome.

Eruptive History

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 1903 Dec 8 ] [ Unknown ] Uncertain    

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.


Oyagua | Ollagua | Oyahue


Feature Name Feature Type Elevation Latitude Longitude
Celosa, Cerro la
    Ingenio, El
Cone 4320 m 21° 16' 0" S 68° 13' 0" W
Poruñita, La Cone 3868 m 21° 19' 0" S 68° 18' 0" W

Photo Gallery

Vigorous fumarolic activity occurs near the summit of Ollagüe volcano, and sulfur deposits have formed. Intensified fumarolic activity was reported in 1854, 1888, 1889, and 1960.

Photo by Oscar González-Ferrán (University of Chile).
Steam pours from vigorous fumaroles near the summit of Volcán Ollagüe. This massive 5868-m-high stratovolcano is capped by a large dacitic lava dome. Collapse of the volcano produced a massive Pleistocene debris-avalanche deposit that extends to the west. Active sulfur mines on the upper western and southern flanks are reached by a road that climbs to about 5500 m elevation. Only increased fumarolic activity has been recorded at Ollagüe during historical time.

Photo by Oscar González-Ferrán (University of Chile).


The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Casertano L, 1963a. Chilean Continent. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 15: 1-55.

Clavero J, Polanco E, Godoy E, Aguilar G, Sparks R S J, van Wyk de Vries B, Perez de Arce C, Matthews S, 2004. Substrata influence in the transport and emplacement mechanism of the Ollague debris avalanche (northern Chile). Acta Vulc, 16: 59-76.

de Silva S L, Francis P W, 1991. Volcanoes of the Central Andes. Berlin: Springer-Verlag, 216 p.

Feeley T C, Davidson J P, 1994. Petrology of calc-alkaline lavas at Volcan Ollague and the origin of compositional diversity at central Andeam stratovolcanoes. J Petr, 35: 1295-1340.

Feeley T C, Davidson J P, Armendia A, 1993. The volcanic and magmatic evolution of Volcan Ollague, a high-K, late Quaternary stratovolcano in the Andean Central Volcaniz Zone. J Volc Geotherm Res, 54: 221-245.

Francis P W, Wells G L, 1988. Landsat thematic mapper observations of debris avalanche deposits in the central Andes. Bull Volc, 50: 258-278.

Gonzalez-Ferran O, 1972. Distribucion del volcanismo activo de Chile y la reciente erupcion del Volcan Villarrica. Instituto Geog Militar Chile, O/T 3491.

Gonzalez-Ferran O, 1995. Volcanes de Chile. Santiago: Instituto Geografico Militar, 635 p.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Vezzoli L, Tibaldi A, Renzullic A, Mennac M, Flude S, 2008. Faulting-assisted lateral collapses and influence on shallow magma feeding system at Ollagüe volcano (Central Volcanic Zone, Chile-Bolivia Andes). J Volc Geotherm Res, 171: 137-159.

Worner G, Hammerschmidt K, Henjes-Kunst F, Lezaun J, Wilke H, 2000. 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. Rev Geol Chile, 27: 205-240.

Volcano Types

Lava dome
Pyroclastic cone

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Andesite / Basaltic Andesite


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Affiliated Databases

Large Eruptions of Ollague Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.