Crystal scavenging from mush piles recorded by melt inclusions
Publication Date
2019-12-20Journal Title
Nature Communications
Publisher
Nature Publishing Group UK
Volume
10
Issue
1
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Wieser, P. E., Edmonds, M., Maclennan, J., Jenner, F. E., & Kunz, B. E. (2019). Crystal scavenging from mush piles recorded by melt inclusions. Nature Communications, 10 (1) https://doi.org/10.1038/s41467-019-13518-2
Abstract
Abstract: Olivine-hosted melt inclusions are commonly used to determine pre-eruptive storage conditions. However, this approach relies on the assumption that co-erupted olivines have a simple association with their carrier melts. We show that primitive olivine crystal cargoes and their melt inclusions display a high degree of geochemical disequilibrium with their carrier melts at Kīlauea Volcano, Hawai’i. Within a given eruption, melt inclusions trapped in primitive olivine crystals exhibit compositional diversity exceeding that in erupted lava compositions since 1790 CE. This demonstrates that erupting liquids scavenge crystal cargoes from mush piles accumulating diverse melt inclusion populations over timescales of centuries or longer. Entrainment of hot primitive olivines into cooler, evolved carrier melts drives post-entrapment crystallization and sequestration of CO2 into vapour bubbles, producing spurious barometric estimates. While scavenged melt inclusion records may not be suitable for the investigation of eruption-specific processes, they record timescales of crystal storage and remobilization within magmatic mush piles.
Keywords
Article, /704/2151/209, /704/2151/431, /704/2151/598, /147/28, /147/135, article
Sponsorship
RCUK | Natural Environment Research Council (NERC) (NE/P017045/1)
Identifiers
s41467-019-13518-2, 13518
External DOI: https://doi.org/10.1038/s41467-019-13518-2
This record's URL: https://www.repository.cam.ac.uk/handle/1810/315459
Rights
Attribution 4.0 International (CC BY 4.0)
Licence URL: https://creativecommons.org/licenses/by/4.0/
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