Supporting information may be found in the online version of this article.

jrs_4161_sm_f1.TIFTIFF image172KFigure S1. Numerical model of the P–T evolution for zircon, rutile, and albite inclusions in a sapphire crystal taken from southeastern Australia (SEA). The model uses Eq. 21 of Zhang,[33] in which a host and an inclusion are postulated to be spherical and isotropic, and behave as a perfect elastic body. For the calculation, the bulk moduli and volume thermal expansion coefficients of the sapphire and the inclusions in Table 1 were used, and the shear modulus of sapphire was set to 166 GPa, which represents the Voigt average of the elastic stiffness constant.[42] We postulate that the P–T path for the exhumation of the sapphire grain follows the ancient geothermal gradient in SEA[48]. The initial diameters of the host sapphire and inclusions are 1 cm and 0.1 mm, respectively. The P–T conditions for the formation of the sapphire were assumed to be 0.92 GPa and 900°C corresponding to the lower crust condition.

Please note: Wiley Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.