(Table 1) Representative analyses of the main minerals in samples from East Antarctica

Biotite and white mica: structural formulae on the basis of 22 oxygens. Ca-amphibole: ferrous and ferric iron contents determined by charge balance and structural formulae on the basis of 23 oxygens and 13 cations excluding Ca+Na+K. Plagioclase: structural formulae on the basis of 8 oxygens. Garnet: structural formulae on the basis of 12 oxygens and 8 cations. Pyroxenes: structural formulae on the basis of 6 oxygens.