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Report on Yanteles (Chile) — November 1993

Bulletin of the Global Volcanism Network, vol. 18, no. 11 (November 1993)
Managing Editor: Richard Wunderman.

Yanteles (Chile) Active fumaroles, some issuing from a hole in the snow-and-ice cap

Please cite this report as:

Global Volcanism Program, 1993. Report on Yanteles (Chile) (Wunderman, R., ed.). Bulletin of the Global Volcanism Network, 18:11. Smithsonian Institution.

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43.497°S, 72.81°W; summit elev. 2049 m

All times are local (unless otherwise noted)

Aerial observations on 21 September 1993 provided a clearer overview of fumarole locations. The aerial observations took place at noon and 1700 and included photo and video records. Two main vent areas were recognized and described. One vent area lies at the S side of the upper ridge segment, and covers an approximate area of 0.05-0.2 km2. This area resembled the flanks of a dome and emitted yellow-colored steam. The other vent area lies ~2 km to the NNE of the previously described one, and exits through a 100-m-wide perforation through Yanteles snow-and-ice cap. This vent area emitted a roughly 100-m high, white-to-yellow plume. Neither this vent area nor any other site in vicinity of the ridge has the morphology of a crater.

Geologic Background. Little-known Yanteles volcano in southern Chile is composed of five glacier-capped peaks along an 8-km-long NE-trending ridge. Several Holocene tephra layers have been documented, but historical activity from this 2042-m-high, andesitic volcanic complex is uncertain. Although there were reports of an eruption at the time of the 20 February 1835 Chile earthquake, and Sapper (1917) reported that previously unseen black areas were seen near the crater after the 1835 earthquake, the nature of this activity is not clear.

Information Contacts: J. Naranjo, SERNAGEOMIN, Santiago.