Title: Cordierite in the Shackleton Range, Antarctica: First Recorded Occurrence
Abstract: An example of cordierite-bearing gneiss that is part of a high-grade gneiss-migmatite sequence is described from the Hatch Plain in the Read Mountains of the Shackleton Range, Antarctica, for the first time. The cordieritebearing rocks eonstitute the more melanosomic portions of the metatectic and migmatitic rocks that are associated with relict granulite facies rocks such as enderbitic granulite and enderbitic garnet granulite. The predominant mineral assemblage in the eordierite-bearing rocks is chemically homogeneous eordierite (X 0.61) and biotite (Xo 0.47), strongly zoned garnot (X 0.18-0.11), silli;llanite, K-feldspar (Or:'.94Ab5.,sAn06)' plagioclase (An28)~ and quartz. Inclusions of sillimanite and biotite relics in both gamet and cordierite indicate that garnet and cordierite were produced by the coupled, discontinuous reaction
Publication Year: 1995
Publication Date: 1995-01-01
Language: en
Type: article
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