Infiltration of aqueous fluid and high fluid-rock ratios during greenschist facies metamorphism; a discussion

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Authors:Wood, Bernard J.; Graham, Colin M.
Author Affiliations:Primary:
Northwest. Univ., Dep. Geol. Sci., Evanston, IL, United States
Other:
Univ. Edinburgh, United Kingdom
Volume Title:Journal of Petrology
Source:Journal of Petrology, 27(3), p.751-761. Publisher: Clarendon Press, Oxford, United Kingdom. ISSN: 0022-3530
Publication Date:1986
Note:In English. For original paper by Ferry, J. M., see J. Petrol., Vol. 25, p. 871-893, 1984. 33 refs.; illus. incl. 2 tables
Summary:Uncertainties in experimental calibrations of geothermometers and in the effects of minor substituents lead the authors to suggest that Ferry's temperatures are approx 40°C too low in the garnet zone. If this were so, the fluid/rock ratio would be lowered by an order of magnitude to approx 0.1:1 and for such a ratio the water source could be a thin sequence of underlying metapelitic rocks and/or the granitic intrusives which accompanied the Acadian orogeny. [R.A.H.]
Subjects:Aqueous solutions; Biotite; Facies; Garnet group; Geologic thermometry; Greenschist facies; Interpretation; Isograds; Metamorphic rocks; Metamorphism; Mica group; Nesosilicates; Orthosilicates; P-T conditions; Paleozoic; Partitioning; Petrology; Phase equilibria; Prograde metamorphism; Schists; Sheet silicates; Silicates; Silurian; Temperature; Thermodynamic properties; Waterville Formation; Maine; United States; South-central Maine
Abstract Numbers:87M/0638
Record ID:1988000331
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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