This assemblage occurs in aluminous pelites in the outer part of the aureole of the Skiddaw Granite in the English Lake District. It has been documented by a PhD student of mine, Sid Burdon. His thesis is Contact metamorphism and fluid-rock interaction associated with the Skiddaw Granite intrusion, Cumbria, Northwest England, 1999, Derby.
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Does anyone know of occurrences of the following rather rare metamorphic
Muscovite+Chloritoid+chlorite+Al2SiO5 mineral (with or without biotite)
Okuyama-Kusunose (J Met Geol 1994) reports extensive development of
MsChlCtdBt and MsCtdAndBt in metamorphosed lateritic pelites in the Tono
aureole, Japan, and alludes to the occurrence of MsCtdChlAnd(without Bt).
The most likely rock types for these assemblages are aluminous metapelites,
aluminous quartzites and metamorphosed altered felsic volcanics.
David R.M. Pattison, Department of Geology and Geophysics,
University of Calgary, Calgary, Alberta, T2N 1N4, Canada.
Phone: 403-220-3263 (my office); 403-220-5841 (dept. office)
Fax: 403-284-0074 email: [log in to unmask]