Persistent multitiered magma plumbing beneath Katla volcano, Iceland

Budd, David,1985-Uppsala universitet,Mineralogi, petrologi och tektonik (author)

Title in thesis list of papers: Persistent two-tiered magma plumbing beneath Katla volcano, Iceland
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.

NATURVETENSKAP Geovetenskap och miljövetenskap Geologi hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geology hsv//eng
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

Troll, Valentin R.Uppsala universitet,Mineralogi, petrologi och tektonik(Swepub:uu)valtr808 (author)
Dahrén, Börje,fil.dr,1984-Uppsala universitet,Mineralogi, petrologi och tektonik(Swepub:uu)borda768 (author)
Burchardt, Steffi,1982-Uppsala universitet,Mineralogi, petrologi och tektonik(Swepub:uu)stebu734 (author)
Uppsala universitetMineralogi, petrologi och tektonik (creator_code:org_t)

In:Geochemistry Geophysics Geosystems: American Geophysical Union (AGU)17:3, s. 966-9801525-2027

By the author/editor: Budd, David, 198 ...; Troll, Valentin ...; Dahrén, Börje, f ...; Burchardt, Steff ...

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