Spatial distribution of zircon with shock microtwins in pseudotachylite-bearing granite gneisses, Vredefort impact structure, South Africa

Mechanical microtwins in zircon is a characteristic shock feature and a potential tool for estimating shock pressure and/or shear stress. However, so far, zircon with microtwins has rarely been described in situ. The present study of pseudotachylite-bearing granitic gneisses from the Vredefort impact structure focuses on the spatial distribution of zircon with microtwins and other deformation features. Zircon hosted by granitic gneiss does not...