Abstract Details
(2020) Suppression of Plagioclase and Clinopyroxene Nucleation in a Basaltic Magma: Insights from Real-Time Synchrotron Tomography
Le Gall N, Arzilli F, Cai B, Polacci M, Vo N, La Spina G, Hartley M, Atwood R, Di Genova D, Nonni S, Llewellin E, Burton M & Lee P
https://doi.org/10.46427/gold2020.1446
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05e: Room 2, Friday 26th June 23:27 - 23:30
Nolwenn Le Gall
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View abstracts at 4 conferences in series
Fabio Arzilli View all 5 abstracts at Goldschmidt2020
Biao Cai View all 2 abstracts at Goldschmidt2020 View abstracts at 2 conferences in series
Margherita Polacci View all 4 abstracts at Goldschmidt2020 View abstracts at 4 conferences in series
Nghia Vo View abstracts at 2 conferences in series
Giuseppe La Spina View all 4 abstracts at Goldschmidt2020 View abstracts at 4 conferences in series
Margaret E. Hartley View all 6 abstracts at Goldschmidt2020 View abstracts at 3 conferences in series
Robert Atwood View all 2 abstracts at Goldschmidt2020 View abstracts at 3 conferences in series
Danilo Di Genova View all 3 abstracts at Goldschmidt2020 View abstracts at 4 conferences in series
Sara Nonni View all 2 abstracts at Goldschmidt2020 View abstracts at 2 conferences in series
Edward W. Llewellin View all 6 abstracts at Goldschmidt2020
Mike R. Burton View all 4 abstracts at Goldschmidt2020
Peter D. Lee View all 2 abstracts at Goldschmidt2020
Fabio Arzilli View all 5 abstracts at Goldschmidt2020
Biao Cai View all 2 abstracts at Goldschmidt2020 View abstracts at 2 conferences in series
Margherita Polacci View all 4 abstracts at Goldschmidt2020 View abstracts at 4 conferences in series
Nghia Vo View abstracts at 2 conferences in series
Giuseppe La Spina View all 4 abstracts at Goldschmidt2020 View abstracts at 4 conferences in series
Margaret E. Hartley View all 6 abstracts at Goldschmidt2020 View abstracts at 3 conferences in series
Robert Atwood View all 2 abstracts at Goldschmidt2020 View abstracts at 3 conferences in series
Danilo Di Genova View all 3 abstracts at Goldschmidt2020 View abstracts at 4 conferences in series
Sara Nonni View all 2 abstracts at Goldschmidt2020 View abstracts at 2 conferences in series
Edward W. Llewellin View all 6 abstracts at Goldschmidt2020
Mike R. Burton View all 4 abstracts at Goldschmidt2020
Peter D. Lee View all 2 abstracts at Goldschmidt2020
Listed below are questions that have been submitted by the community that the author will try and cover in their presentation. To submit a question, ensure you are signed in to the website. Authors or session conveners approve questions before they are displayed here.
Submitted by Julia Hammer on Saturday 27th June 00:07
Nice presentation, and interesting results! a comment/ inference about why the stepwise experiments produced cpx whereas the constant-rate experiments did not: The step-cooling experiments promoted faster growth of plagioclase because of higher DT at moment of nucleation. The failure of compositional boundary layer in the liquid surrounding plag to relax caused supersaturation of cpx. By contrast, the constant-rate cooling experiments promoted diffusive relaxation of the boundary layers and this "suppressed" cpx nucleation. If this is correct, the constant-rate cooling experiments produced cpx closer to it's equilibrium-in temperature. I.e., for me this is not an issue of nucleation suppression in the constant-rate (linear cooling) experiments, but rather hastened nucleation in the isothermal (dwell-type) experiments. Is this a possibility you have considered? Or do you have an alternate interpretation?
Nice presentation, and interesting results! a comment/ inference about why the stepwise experiments produced cpx whereas the constant-rate experiments did not: The step-cooling experiments promoted faster growth of plagioclase because of higher DT at moment of nucleation. The failure of compositional boundary layer in the liquid surrounding plag to relax caused supersaturation of cpx. By contrast, the constant-rate cooling experiments promoted diffusive relaxation of the boundary layers and this "suppressed" cpx nucleation. If this is correct, the constant-rate cooling experiments produced cpx closer to it's equilibrium-in temperature. I.e., for me this is not an issue of nucleation suppression in the constant-rate (linear cooling) experiments, but rather hastened nucleation in the isothermal (dwell-type) experiments. Is this a possibility you have considered? Or do you have an alternate interpretation?
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