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Locating the depth of magma supply for volcanic eruptions, insights from Mt. Cameroon
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Mineralogy Petrology and Tectonics.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Mineralogy Petrology and Tectonics.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Mineralogy Petrology and Tectonics. Univ Las Palmas Gran Canaria, Dept Phys GEOVOL, La Palmas Gran Canaria, Spain.
2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, 33629Article in journal (Refereed) Published
Abstract [en]

Mt. Cameroon is one of the most active volcanoes in Africa and poses a possible threat to about half a million people in the area, yet knowledge of the volcano’s underlying magma supply system is sparse. To characterize Mt. Cameroon’s magma plumbing system, we employed mineral-melt equilibrium thermobarometry on the products of the volcano’s two most recent eruptions of 1999 and 2000. Our results suggest pre-eruptive magma storage between 20 and 39 km beneath Mt. Cameroon, which corresponds to the Moho level and below. Additionally, the 1999 eruption products reveal several shallow magma pockets between 3 and 12 km depth, which are not detected in the 2000 lavas. This implies that small-volume magma batches actively migrate through the plumbing system during repose intervals. Evolving and migrating magma parcels potentially cause temporary unrest and short-lived explosive outbursts, and may be remobilized during major eruptions that are fed from sub-Moho magma reservoirs.

Place, publisher, year, edition, pages
2016. Vol. 6, 33629
National Category
Geochemistry
Identifiers
URN: urn:nbn:se:uu:diva-304697DOI: 10.1038/srep33629ISI: 000391998100001PubMedID: 27713494OAI: oai:DiVA.org:uu-304697DiVA: diva2:1033551
Funder
The Royal Swedish Academy of SciencesSwedish Research Council
Available from: 2016-10-07 Created: 2016-10-07 Last updated: 2017-11-30Bibliographically approved

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Geiger, HarriBarker, Abigail K.Troll, Valentin R.

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