Rae, ASP, Edmonds, M, Maclennan, J et al. (4 more authors) (2016) Time scales of magma transport and mixing at Kīlauea Volcano, Hawai’i. Geology, 44 (6). pp. 463-466. ISSN 0091-7613
Abstract
Modeling of volcanic processes is limited by a poor knowledge of the time scales of storage, mixing and final ascent of magmas into the shallowest portions of volcanic ‘plumbing’ systems immediately prior to eruption. It is impossible to measure these timescales directly; however, micro-analytical techniques provide indirect estimates based on the extent of diffusion of species through melts and crystals. Here, diffusion in olivine phenocrysts from the A.D. 1959 Kīlauea Iki (Hawai’i, USA) eruption is used to constrain the timing of mixing events in the crustal plumbing system on time scales of months to years before eruption. The time scales derived from zonation of Fe-Mg in olivines, combined with contemporaneous geophysical data suggests mixing occurred on three time scales: (1) up to 1 yr prior to eruption in the deep storage system; (2) in a shallow reservoir, between incoming hot melts and resident melt for several weeks to months prior to eruption; and (3) in the conduit and summit reservoir, between the resident magma and cooled surface lava, draining back into the vent on time scales of hours to several days during pauses between episodes. Synchronous inflation of the shallow reservoir with deep earthquake swarms and mixing suggests a fitfully open transcrustal magmatic system.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Authors. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY). |
Keywords: | Kīlauea; Hawai'i; Magmatic timescales; Diffusion chronometry |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Jun 2016 14:11 |
Last Modified: | 23 Jun 2023 22:07 |
Published Version: | https://dx.doi.org/10.1130/G37800.1 |
Status: | Published |
Publisher: | Geological Society of America |
Identification Number: | 10.1130/G37800.1 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:100560 |