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(2020) Eclogites of the North Atlantic Craton: Insights from the Chidliak Eclogite Xenoliths (S. Baffin Island, Canada)

Pobric V, Korolev N & Kopylova M


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03g: Room 1, Thursday 25th June 00:42 - 00:45

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Submitted by Jing Sun on Tuesday 23rd June 07:40
Thank you for giving the presentation. For questions, how did you calculate the pressures and temperatures of eclogites with and without opx? What thermobarometer or you used PerpleX? Thank you.
Thank you for your question! We used the same approach for opx-bearing and opx-free eclogites. Equilibration pressures and temperatures of the eclogites were obtained using the latest version of the garnet-clinopyroxene geothermometer (Nakamura 2009) in combination with local geotherms derived for 65 peridotite xenoliths from Chidliak (Kopylova et al. 2019). On slides 6 and 7 in the presentation file, the local geotherms are green and red lines, and the blue line is the averaged peridotite geotherm. As can be seen from the figures, they correspond with a surface heat flow between 35 and 37 mW/m2 (Hasterok and Chapman 2011). The peridotite geotherms were calculated using FITPLOT (Mather et al. 2011). Dear Colleagues, You can find more details of this research in the recent Contributions to Mineralogy and Petrology paper: https://link.springer.com/article/10.1007/s00410-020-01709-w#Sec20 You can also get an open access to a full-text view-only version of the paper by using the link below: https://rdcu.be/b5vOt Best regards, Nester

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