The assemblage quartz — Sillimanite — Garnet — Cordierite as an indicator of metamorphic conditions in the Daly Bay Complex,N.W.T. |
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| Authors: | I Hutcheon E Froese T M Gordon |
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| Institution: | (1) Geological Survey of Canada, Ottawa, Canada;(2) Present address: Department of Geology, Carleton University, Ottawa, Canada |
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| Abstract: | If cordierite is treated as an anhydrous mineral, the composition of garnet and cordierite, coexisting with quartz and silliminate, depends on total pressure and temperature. Phase relations may be deduced by combining some available experimental work with several approximations. Assuming ideal ionic solution in garnet and cordierite, analyses of coexisting garnet and cordierite permit the determination of total pressure and temperature. Five rocks from the Daly Bay Complex, N. W. T., collected from locations up to 35 miles apart, indicate a range of 610–760 and 5.3–6.6 kb. |
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