Calcic amphibole equilibria and a new amphibole-plagioclase geothermometer; reply

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Authors:Blundy, Jonathan D.; Holland, Timothy J. B.
Author Affiliations:Primary:
Bristol Univ., Dep. Geol., Bristol, United Kingdom
Volume Title:Contributions to Mineralogy and Petrology
Source:Contributions to Mineralogy and Petrology, 111(2), p.269-272. Publisher: Springer International, Heidelberg-New York, International. ISSN: 0010-7999
Publication Date:1992
Note:In English. For reference to discussion see Rutherford, M. J., et. al., Contrib. Mineral. Petrol., Vol. 111, No. 2, p. 266-268, 1992; for reference to original see Blundy, J. D. and Holland, T. J. B., Contrib. Mineral. Petrol., Vol. 104, p. 208-224, 1990. 22 refs.; illus.
Summary:The present authors reaffirm the barometric potential for their amphibole-plagioclase thermometer for rocks where (and only where) the final equilibration T is very well constrained. In the advantageous case of granitic rocks with simple thermal histories this T may be the wet granitic solidus at the P of interest. They emphasise the need for careful petrographic assessment of equilibrium between plagioclase and amphibole before attempting total-Al barometry and recommend that a relatively large number of pairs are analysed for each sample. In rocks with complex post- consolidation or fluid-flow histories such barometry requires an independent means of determining amphibole equilibration T. [P.Br.]
Subjects:Alkaline earth metals; Amphibole group; Calcium; Chain silicates; Clinoamphibole; Edenite; Feldspar group; Framework silicates; Geologic thermometry; Hornblende; Metals; Mineral assemblages; Pargasite; Plagioclase; Silicates; Tremolite
Abstract Numbers:93M/998
Record ID:1993040337
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe
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