I hope you are doing well.
Could you please help me calculate the fluid oxygen isotope range also source temperature based on the analyzed magnetite's oxygen isotopic data?
Is there any excel file for automatic calculation?
Hi Afshin, I am not very familiar with this. You´d better check with Valentin Troll, Erik Joinsson or Franz Weis.
Cheers,
Ulf
Hi Ulf,
Thank you for your help. I am in contact with Prof. Troll.
The appendix to our Nature Communication paper (from page 20 onward) is good for this problem.
Hi Afshin,
It depends a bit on the temperature range that you are interested in. For 18O/16O fractionation at high temperatures, it is probably best to use the fractionation factors by Zheng et al. (1991, GCA) that are based on the vibrational frequencies of the molecules. For triple oxygen isotope fractionation, one could use the theoretical values by Hayles et al. (2018, GCA). Both papers explain well how to to calculate water-magnetite fractionation at different temperatures. It is important to keep in mind that the calculations give accurate results only at the level of ca. +/- 0.5 per mill in d18O at the very best.
Best wishes,
Stefan
Stefan T.M. Peters
Hi Stefan,
Thank you for your attention and Thank you in advance for your help.
Dear Stefan T.M. Peters
Could you please send calculation samples based on Zheng et al, (1991) and Hayles et al, (2018).
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