Prehnite-epidote equilibria and their petrologic applications

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Authors:Liou, J. G.; Kim, Hyung Shik; Maruyama, Shigenori
Author Affiliations:Primary:
Stanford Univ., Dep. Geol., Stanford, CA 94305, United States
Volume Title:Journal of Petrology
Source:Journal of Petrology, 24(4), p.321-342. Publisher: Clarendon Press, Oxford, United Kingdom. ISSN: 0022-3530
Publication Date:1983
Note:In English. 2 p. refs.; illus. incl. 12 anal., 7 tables
Summary:Using conventional hydrothermal apparatus and solid oxygen-buffer techniques, the phase relations of prehnite and epidote are shown to be defined by continuous reactions where a transition zone between the garnet-in reaction and the prehnite-out reaction occurs at 325-343°C, 2 kbar; 353-375°C, 5 kbar; and 373-395°C, 8 kbar Pfluid and fO2 of the HM buffer. These results, combined with previously determined relations for prehnite, zoisite and epidote, delineate a petrogenetic grid which is consistent with parageneses and variation in Fe/Al ratios of coexisting prehnite and epidote in metabasic rocks of the prehnite-pumpellyite and pumpellyite-actinolite facies, and in altered rocks from many geothermal systems. [R.A.H.]
Subjects:Chain silicates; Epidote group; Experimental studies; Facies; High pressure; Low temperature; Low-grade metamorphism; Metamorphic rocks; Metamorphism; Mineral assemblages; Orthosilicates; Petrology; Phase equilibria; Prehnite; Prehnite-pumpellyite facies; Pressure; Silicates; Sorosilicates; Stability; Synthesis; Temperature
Abstract Numbers:84M/1618
Record ID:1986006238
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique
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