Extended Data Fig. 10: Isotopic comparison with Jack Hills zircons.
From: Evidence for pre-Noachian granitic rocks on Mars from quartz in meteorite NWA 7533
(a) Calculation of δ18O for quartz in equilibrium with zircon versus temperature for the Hadean Jack Hills zircons. Zircon δ18O data are from 6 zircons in Peck et al.56 and 18 zircons in Mojzsis et al.37, and the oxygen fractionation is taken from Valley et al.57. Each point is the average of calculated values and the error is their standard deviation. (b) The δ18O values measured in the Martian quartz are shown in the histogram plot for comparison.
