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Persistent multitiered magma plumbing beneath Katla volcano, Iceland
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- Budd, David, 1985- (author)
- Uppsala universitet,Mineralogi, petrologi och tektonik
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- Troll, Valentin R. (author)
- Uppsala universitet,Mineralogi, petrologi och tektonik
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- Dahrén, Börje, fil.dr, 1984- (author)
- Uppsala universitet,Mineralogi, petrologi och tektonik
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- (creator_code:org_t)
- American Geophysical Union (AGU), 2016
- 2016
- English.
- In: Geochemistry Geophysics Geosystems. - : American Geophysical Union (AGU). - 1525-2027. ; 17:3, s. 966-980
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Recent seismic unrest and a persistent Holocene eruption record at Katla volcano, Iceland indicate that a near-future eruption is possible. Previous petrological investigations suggest that Katla is supplied by a simple plumbing system that delivers magma directly from depth, while seismic and geodetic data also point toward the existence of upper-crustal magma storage. To characterize Katla's recent plumbing system, we established mineral-melt equilibrium crystallization pressures from four age-constrained Katla tephras spanning from 8 kyr BP to 1918. The results point to persistent shallow- (≤8 km depth) as well as deep-crustal (ca. 10 – 25 km depth) magma storage beneath Katla throughout the last 8 kyr. The presence of multiple magma storage regions implies that mafic magma from the deeper reservoir system may become gas-rich during ascent and storage in the shallow crust and erupt explosively. Alternatively, it might intersect evolved magma pockets in the shallow-level storage region, and so increase the potential for explosive mixed-magma ash eruptions.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Keyword
- Katla volcano; mineral-melt equilibrium thermobarometry; persistent multi-tiered magma plumbing system
- Geovetenskap med inriktning mot mineralogi, petrologi och tektonik
- Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
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- ref (subject category)
- art (subject category)
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