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News
Thu, 9 Jul 2020, 07:06
Laguna del Maule volcano covered by snow on 27 June (image: SERNAGEOMIN)
On 7 July SERNAGEOMIN reported that the seismicity remains elevated associated with earthquakes located east of the volcano with diameter approx. 5 km near the intersection of two faults near Las Nieblas, and corresponded to elevated levels of carbon dioxide emissions. ... read all
Fri, 19 Jun 2020, 08:24
During 11-16 Jun SERNAGEOMIN recorded increased seismic activity associated with seismic swarms. On 15 June recorded volcano-tectonic earthquakes that were located at 10,4 km depth beneath the southwest flank of the volcano. ... read all
 

Laguna del Maule volcano

caldera 3092 m / 10,144 ft
Central Chile, -36.02°S / -70.58°W
Current status: restless (2 out of 5)
Laguna del Maule webcams / live data | Reports
Laguna del Maule volcano books
Last update: 9 Jul 2020 (seismicity remains elevated)
Typical eruption style: explosive
Laguna del Maule volcano eruptions: unknown, but less than 10,000 years ago
TimeMag. / DepthDistanceLocation
Wed, 29 Jul 2020 (UTC)
Wed, 29 Jul 06:38 UTCM 3.3 / 182.7 km26 km120 km al E de Linares (Argentina)
Thu, 25 Jun 2020 (UTC)
Thu, 25 Jun 01:15 UTCM 2.9 / 170.5 km17 km110 km al E de Linares (Argentina)
Wed, 24 Jun 2020 (UTC)
24/06/2020 04:39:36 (24 Jun 07:39:36 UTC)M 3.3 / 182 km25 kmNEUQUEN (Argentina)
Sat, 22 Feb 2020 (UTC)
Sat, 22 Feb 07:25 UTCM 2.6 / 148.7 km24 km84 km al NE de San Fabián (Chile)
View all recent quakes
Laguna del Maule is a 15x25 km wide lake-filled volcanic caldera in central Chile near the border to Argentina, east of Nevados de Longavi volcano. The complex is less than 30,000 years old and covers 300 km2 contains a cluster of small stratovolcanoes, lava domes, and cinder cones some of which are younger than 10,000 years.

Background:

In this region of the Andes, the volcanoes are about 90 km above the top of the subducting slab of the Nazca place, the so-called Benioff zone, which dips at an angle of 25 degrees. The subducting plate is broken into different segments subducting at different angles under continental crust of varying thickness. This results in zones of different magma generation. Volcanoes around 33-34 deg S are predominantly andesitic, while volcanoes south of 37 deg S are more basaltic. The Laguna del Maule volcano lies in this transition zone. It has more silica-rich, even rhyolite lavas than the volcanoes further to the south, which are mainly basaltic.

4 volcanic units are distinguished in the evoution of the Laguna del Maule volcanic complex:
1) Valley unit
2) Dikes and Volcanic neck unit
3) Volcanic Cones
4) Lake unit

Valley unit: 14 lava flows are found exposed in the upper part of the Maule river valley. Their vents are covered by younger lava flows of the Lake unit.
The Lake unit consists of rhyolitic domes and flows, as well a cluster of Pleistocene cones found around Maule Lake. The individual vents include Domo del Maule, Loma de los Espejos, Colada Occidental, Colada Dendrifonne, Colada las Nieblas, Cerro Barrancas, Colada Cari-Launa, and an explosion crater on the eastern side of the lake. The latter represents the latest activity from Laguna del Maule.
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Source:
- Frederick A. Frey, David C. Gerlach, Rosemary L. Hickey, Leopoldo Lopez-Escobar and Francisco Munizaga-Villavicencio (1984) "Petrogenesis of the Laguna del Maule volcanic complex, Chile (36° S)", Contributions to Mineralogy and Petrology, Volume 88, Numbers 1-2, 133-149

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