Hogbomite in sappherine-bearing rocks from the Bamble Sector, south Norway

Hogbomite is reported from two upper-amphibolite and granulite-facies, sapphirine-bearing, Al-Mg-Fe-rich and silica-poor lens-shaped layers within the Bamble Sector, south Norway. Primary assemblages, indicating peak metamorphic conditions of 773-844 °C at 7 kbar (Mg-Fe exchange thermometry), are spinel-sapphirine-biotite-gedrite, spinel-corudum...

Sapphirine-cordierite-bearing metasediments at Gladstad, South of Tvedestrand

Aluminous reaction textures in orthoamphibol-bearing rocks; the pressure-temperature evolution of the high-grade Proterozoic of the Bamble sector, south Norway