Microstructures of Prograde Reaction

Practical demonstration for ISPET seminar

The practical part of this ISPET seminar contribution consisted of thin section study of a selection of metapelitic rocks, with accompanying notes, to illustrate points raised in the lecture.

Here I have documented those specimens, and added more information about some of the other rocks illustrated in the lecture.

Case 1: Timeball Hill metapelite, aureole of the Bushveld Complex, South Africa

Case 2: Graphitic metapelites, Boven shale member, aureole of the Bushveld Complex, South Africa

Case 3: Andalusite-sillimanite-staurolite schist, Okahandja Lineament zone of the Damara belt, Namibia

Case 4: Sillimanite-kyanite-garnet mica schist, Trough zone of the Damara belt, Namibia

Case 5: Zoutpan Schist, West Coast (Gariep) belt, South Africa

Case 6: Andalusite-staurolite schist, Buchan Dalradian, NE Scotland