Crystal scavenging from mush piles recorded by melt inclusions.
Publication Date
2019-12-20Journal Title
Nature communications
ISSN
2041-1723
Publisher
Springer Nature
Volume
10
Issue
1
Pages
5797
Language
eng
Type
Article
This Version
AM
Physical Medium
Electronic
Metadata
Show full item recordCitation
Wieser, P., Edmonds, M., Maclennan, J., Jenner, F. E., & Kunz, B. E. (2019). Crystal scavenging from mush piles recorded by melt inclusions.. Nature communications, 10 (1), 5797. https://doi.org/10.1038/s41467-019-13518-2
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 AD. 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.
Sponsorship
NERC (NE/L002507/1)
Embargo Lift Date
2022-11-14
Identifiers
External DOI: https://doi.org/10.1038/s41467-019-13518-2
This record's URL: https://www.repository.cam.ac.uk/handle/1810/298902
Rights
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