quartzite from the Mesoproterozoic Itremo Group (Central Madagascar) Giulio Morteani and Dietrich Ackermand...(APB)-bearing Mesoproterozoic quartzite of the Itremo Group (central Madagascar) and discusses the genesis of the...as well as the metamorphic P-T-conditions. The Itremo Group consists from bottom to top of a micaschist...shallow continental shelf environment. Lazulite, augelite, trolleite, svanbergite, goyazite, crandallite...thermal springs. Using textures, stability data for augelite, trolleite, berlinite, lazulite, scorzalite, dumortierite |