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Stable isotope compositions of alteration fluids in low-grade Lower Palaeozoic rocks, English Lake District

Published online by Cambridge University Press:  05 July 2018

L. J. Thomas ,
R. S. Harmon  and
G. J. H. Oliver
L. J. Thomas
Affiliation:
Department of Geology, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
R. S. Harmon
Affiliation:
Department of Geology, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
G. J. H. Oliver
Affiliation:
Department of Geology, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
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Abstract

A combination of hydrogen and oxygen isotope analyses and fluid inclusion studies has defined the composition of fluids involved in the metamorphism of Lower Palaeozoic rocks in the English Lake District. Three fluid fields have been defined from secondary phases: 1, syn-burial metamorphic D-enriched fluids from epidote and chlorite at a temperature between 250 and 350°C; D-depleted fluid measured from groundmass and quartz inclusions; 3, a mixed magmatic-meteoric fluid with an intermediate H-isotopic composition estimated from W/R granite data and calculated from illite.

Keywords

metamorphismstable isotopesPalaeozoic rocksLake DistrictEngland
Type
Research Article
Information
Mineralogical Magazine , Volume 49 , Issue 352 , June 1985 , pp. 425 - 434
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985

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