George W. Putman, Jerry W. Sullivan; Granitic pegmatites as estimators of crustal pressures — A test in the eastern Adirondacks, New York. Geology ; 7 (11): 549–553. doi: https://doi.org/10.1130/0091-7613(1979)7<549:GPAEOC>2.0.CO;2
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Liquidus equilibria of the “granitic” system (Q-Or-Ab-An-H2O) provide a potential means of estimating pressures and temperatures in natural rocks if certain requirements are met. These include limitations on bulk composition and mineralogy and a basis for a presumption of fluid-phase saturation of the former melt. A test of application of the experimental data is possible by means of at least two approaches.
In this paper we show that an estimate of 7 kb obtained from a cross-cutting granite pegmatite in the eastern Adirondacks, New York, compares favorably with the results of other studies of similar granulite-facies metamorphism.