Deciphering the evolution of ultrahigh temperature granulites, Prydz Bay, Antarctica: reaction textures, reaction history and the relationships between lower crustal and mantle processes during continent formation and destruction
Final Report Abstract
A variety of granulite-facies metamorphic rocks were sampled from a number of locations from within the exposed Precambrian basement forming the islands and promontories of the Larsemann Hills and Rauer Islands. The main sampling locations from the Larsemann Hills were on Osmar and Fisher islands, and the Stornes, Broknes, Stinear and Brattnevet peninsulas. In the Rauer Islands most samples were from the Mather peninsula with additional material also collected from Filla Island. The main rocks collected were: cordierite-and garnet-rich pods in migmatitic gneisses, lenses of metapelite in migmatitic gneisses, magnetite-rich lenses in quartzo-feldspathic gneisses, B-rich mineral lenses with tourmaline and/or kornerupine, calc-silicate rocks, marble, mafic garnet-clinopyroxene granulites, orthopyroxene-rich gneisses and sapphirine-bearing metapelites.
Publications
- 2008 Petrology of Prydz Bay granulites (Larsemann Hills and Rauer Islands). Berichte zur Polar- und Meeresforschung 583, 102-106
Patrick J. O’Brien & Roland Oberhänsli
