Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138995
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dc.contributor.authorLynn, Kendra J.en_US
dc.contributor.authorShea, Thomasen_US
dc.contributor.authorGarcia, Michael O.en_US
dc.contributor.authorCosta, Fidelen_US
dc.contributor.authorNorman, Marc D.en_US
dc.date.accessioned2020-05-14T09:03:52Z-
dc.date.available2020-05-14T09:03:52Z-
dc.date.issued2018-
dc.identifier.citationLynn, K. J., Shea, T., Garcia, M. O., Costa, F., & Norman, M. D. (2018). Lithium diffusion in olivine records magmatic priming of explosive basaltic eruptions. Earth and Planetary Science Letters, 500, 127-135. doi:10.1016/j.epsl.2018.08.002en_US
dc.identifier.issn0012-821Xen_US
dc.identifier.urihttps://hdl.handle.net/10356/138995-
dc.description.abstractThe short duration (e.g., hours to days) of magmatic processes leading up to volcanic eruptions are challenging to characterize using conventional petrologic and geophysical methods. This is especially true for eruptions that occurred prior to the implementation of seismic and geodetic monitoring (mid-20th century). We present a new application of diffusion chronometry that utilizes lithium zoning in olivine phenocrysts to investigate the timing of late-stage, pre-eruptive magma mixing at Kīlauea Volcano (Hawai‘i). The diffusive re-equilibration of sub-ppm changes in lithium concentration are modeled in rapidly quenched, well-oriented olivine from six eruptions during a dominantly explosive period (1500–1820 CE). Lithium timescales reveal repeated intrusion of primitive composition magma into Kīlauea's shallow (∼2–6 km) reservoir system typically only a few days prior to each eruption. These timescales are shorter than the weeks to years retrieved from modeling Fe–Mg and Ni zoning in the same olivine crystals, which record earlier magma mixing events. The short Li timescales indicate that an intrusion primed the shallow magma reservoir potentially only hours to a few days before an eruption. Late-stage intrusions and mixing events should thus be investigated at other basaltic volcanoes to better understand pre-eruptive processes, so that eruption scenarios can be better constrained.en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.language.isoenen_US
dc.relation.ispartofEarth and Planetary Science Lettersen_US
dc.rights© 2018 Elsevier B.V. All rights reserved. This paper was published in Earth and Planetary Science Letters and is made available with permission of Elsevier B.V.en_US
dc.subjectScience::Geology::Volcanoes and earthquakesen_US
dc.titleLithium diffusion in olivine records magmatic priming of explosive basaltic eruptionsen_US
dc.typeJournal Articleen
dc.contributor.schoolAsian School of the Environmenten_US
dc.contributor.researchEarth Observatory of Singaporeen_US
dc.identifier.doi10.1016/j.epsl.2018.08.002-
dc.description.versionAccepted versionen_US
dc.identifier.scopus2-s2.0-85051833865-
dc.identifier.volume500en_US
dc.identifier.spage127en_US
dc.identifier.epage135en_US
dc.subject.keywordsOlivineen_US
dc.subject.keywordsDiffusionen_US
dc.description.acknowledgementThe authors thank Gareth Fabbro for assistance with LA-ICPMS analyses, Eric Hellebrand for help with EPMA, Don Swanson for sample collection, and Eileen Chen for sample preparation. We are grateful to Adam Kent and E. Bruce Watson for constructive reviews and Tamsin Mather for editorial handling. This work was supported by the Fred M. Bullard Graduate Fellowship (University of Hawai‘i) and a National Science Foundation (NSF) East Asia and Pacific Summer Institutes grant (OISE15-13668) to K.J.L. Additional support was provided by NSF grants to M.G. (EAR13-47915 and EAR14-49744) and T.S. (EAR13-21890), and a National Research Foundation Singapore Investigatorship Award (NRF-NRFI2017-06) to F.C. This is SOEST contribution number 10431.en_US
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