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Abstract Details

δ94/90Zr Variations in Granites

Kirkpatrick H, Harrison M, Liu M-C, Bell E, Tissot F & Ibañez-Mejia M

Kirkpatrick H, Harrison M, Liu M-C, Bell E, Tissot F & Ibañez-Mejia M (2020) Goldschmidt Abstracts, 2020 1325

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04j: Room 1, View in program

Heather Kirkpatrick
Mark Harrison View all 2 abstracts at Goldschmidt2020
Ming-Chang Liu
Elizabeth Bell
Francois L. H. Tissot View all 2 abstracts at Goldschmidt2020
Mauricio Ibañez-Mejia

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 Changqian Ma on
Thank you for showing a very exciting and important study! Could you please introduce the application of non-traditional stable isotope systems in granite research?


Submitted by Marc Norman on
Thank you for a very nice study with intriguing results. Clearly there is a lot of work needed to understand the causes of the Zr isotopic variations, very exciting! My question is: many granites formed by mixtures of crustal and mantle components, how might this impact on Zr-isotopic variations? Might be interesting to compare Zr isotopic variations with O and/or Hf isotopes? Best wishes for your work.


Submitted by Calvin Miller on
Intriguing, potentially very powerful new approach! Some questions: (1) Have you considered using Hf in zircon (or Zr/Hf) as a fractionation indicator (I believe that it is more reliable than Th and U)? (2) Do you think that crystallization of zircon is the principal (or only) effective mechanism for modifying d94/90Zr? If so, then I suppose that the value in zircons of unknown heritage will be useful as an indicator of extent of zircon fractionation in the magmatic heritage of a grain (or zone) – correct? (3) Are you interested in testing your hypotheses in suites of zircon-bearing samples that show evidence for simple and fairly extreme closed-system fractionation?


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