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NewsSaturday, Apr 20, 2013
The latest report of Sernageomin indicates that volcanic unrest continues at reduced intensity. GPS measurements show that the central part of the volcanic edifice has been experiencing uplift at a rate of 1.4 cm / month and a horizontal displacement to the west at a rate of 0.64 cm / month. ...
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Saturday, Mar 09, 2013
New signs of volcanic unrest - seismic swarms and ground inflation - have been detected at the volcano recently and SERNAGEOMIN raised the alert level of the volcano to yellow. ...
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Laguna del Maule volcanocaldera 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 [hide map] [enlarge map]
Last update: 20 Apr 2013
Typical eruption style: explosive Laguna del Maule volcano eruptions: unknown, but less than 10,000 years ago Last earthquakes nearby:
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. --- 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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