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A stochastic sampling approach to zircon eruption age interpretation

Author(s): Keller, CB; Schoene, Blair; Samperton, Kyle M

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DC FieldValueLanguage
dc.contributor.authorKeller, CB-
dc.contributor.authorSchoene, Blair-
dc.contributor.authorSamperton, Kyle M-
dc.date.accessioned2022-01-25T14:50:19Z-
dc.date.available2022-01-25T14:50:19Z-
dc.date.issued2018-01-01en_US
dc.identifier.citationKeller, C. Brenhin, Blair Schoene, and Kyle M. Samperton. "A stochastic sampling approach to zircon eruption age interpretation." Geochemical Perspectives Letters 8 (2018): 31 - 35. doi:10.7185/geochemlet.1826.en_US
dc.identifier.issn2410-339X-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1j960863-
dc.description.abstractThe accessory mineral zircon is widely used to constrain the timing of igneous processes such as magma crystallisation or eruption. However, zircon U-Pb ages record zircon crystallisation, which is not an instantaneous process. Zircon saturation calculations link zircon crystallisation, temperature, and melt fraction, allowing for the estimation of zircon crystallisation distributions as a function of time or temperature. Such distributions provide valuable prior information, enabling Bayesian estimates of magma eruption time and allowing for comparison of the relative accuracy of common weighted-mean and youngest-zircon age interpretations with synthetic datasets. We find that both traditional interpretations carry a risk of underestimating the uncertainty in eruption age; a low mean square of weighted deviates (MSWD) does not guarantee the accuracy of weighted-mean interpretations. In the absence of independent confirmation that crystallisation timescale is short relative to analytical uncertainties, a Bayesian approach frequently provides the most accurate results and is least likely to underestimate uncertainty. Finally, since U-Pb zircon studies now routinely resolve geological age dispersion due to increasing analytical precision, such considerations are increasingly critical to future progress in resolving rates and dates of Earth processes.en_US
dc.format.extent31 - 35en_US
dc.language.isoen_USen_US
dc.relation.ispartofGeochemical Perspectives Lettersen_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleA stochastic sampling approach to zircon eruption age interpretationen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.7185/geochemlet.1826-
dc.identifier.eissn2410-3403-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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