Technical Comments

Comment on “Rapid cooling and cold storage in a silicic magma reservoir recorded in individual crystals”

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Science  22 Dec 2017:
Vol. 358, Issue 6370, eaap8429
DOI: 10.1126/science.aap8429

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Rubin et al. (Reports, 16 June 2017, p. 1154) proposed that gradients in lithium abundance in zircons from a rhyolitic eruption in New Zealand reflected short-lived residence at magmatic temperatures interleaved with long-term “cold” (<650°C) storage. Important issues arise with the interpretation of these lithium gradients and consequent crystal thermal histories that raise concerns about the validity of this conclusion.

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