Palaeohydrology of the calcsilicate aureole of the Beinn an Dubhaich Granite, Skye, Scotland; a stable isotopic study

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Authors:Holness, M. B.; Fallick, A. E.
Author Affiliations:Primary:
University of Edinburgh, Department of Geology and Geophysics, Edinburgh, United Kingdom
Other:
Scottish Universities Research and Reactor Centre, United Kingdom
Volume Title:Journal of Metamorphic Geology
Source:Journal of Metamorphic Geology, 15(1), p.71-83. Publisher: Blackwell, Oxford, United Kingdom. ISSN: 0263-4929
Publication Date:1997
Note:In English. 26 refs.; illus., incl. 3 tables, geol. sketch map
Summary:In this aureole, strongly depleted isotopic compositions of reaction-product calcite correlate with high silica and fluorine contents, demonstrating a strong link between isotopic alteration and metasomatism by fluids with a significant magmatic component, even at the margins of the aureole. The Δ18O and Δ13C compositions of the carbonates form a linear cluster with a positive slope of ∼ 5, consistent with the depletion of isotope compositions by the infiltration of magmatic and/or meteoric fluids. Stable isotope compositions of coexisting calcite-dolomite pairs show varying degrees of isotopic disequilibrium, which correlates with the inferred fluid infiltration mechanism. The largest fractions are found in dolostones that have been infiltrated along pre-metamorphic fractures, and the smallest occur where fluid flow was pervasive. [R.A.H.]
Subjects:Aureoles; C-13; Carbon; Carbonates; Circulation; Contact metamorphism; Fluid phase; Geochemistry; Hydrothermal conditions; Isotope ratios; Isotopes; Metamorphic rocks; Metamorphism; Metasedimentary rocks; O-18/O-16; Oxygen; Stable isotopes; Europe; Great Britain; Hebrides; Highland region Scotland; Inner Hebrides; Inverness-shire Scotland; Isle of Skye; Scotland; United Kingdom; Western Europe; Balnakeil Formation; Beinn an Dubhaich Granite
Coordinates:N570000 N574000 W0054000 W0064500
Abstract Numbers:97M/2791
Record ID:1997018038
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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001 1997018038
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005 20190221172439.0
008 190110e199701 xxka 0 0 eng d
034 0 |a a  |d W0064500  |e W0054000  |f N574000  |g N570000 
040 |a ViAlAGI  |c ViAlAGI 
072 7 |a 02D  |2 georeft 
072 7 |a 05A  |2 georeft 
100 1 |a Holness, M. B.  |e analytic author  |u University of Edinburgh, Department of Geology and Geophysics, Edinburgh 
245 1 0 |a Palaeohydrology of the calcsilicate aureole of the Beinn an Dubhaich Granite, Skye, Scotland; a stable isotopic study 
300 |a p. 71-83 
500 |a In English. 26 refs. 
500 |a Abstract number: 97M/2791 
500 |a Abstractor: R.A.H. 
500 |a Affiliation: University of Edinburgh, Department of Geology and Geophysics; Edinburgh; GBR; United Kingdom 
500 |a Affiliation: Scottish Universities Research and Reactor Centre; ; GBR; United Kingdom 
500 |a Key title: Journal of Metamorphic Geology 
500 |a Source note: Journal of Metamorphic Geology, 15(1), p.71-83. Publisher: Blackwell, Oxford, United Kingdom. ISSN: 0263-4929 
500 |a Publication type: journal article 
504 |b 26 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom 
520 |a In this aureole, strongly depleted isotopic compositions of reaction-product calcite correlate with high silica and fluorine contents, demonstrating a strong link between isotopic alteration and metasomatism by fluids with a significant magmatic component, even at the margins of the aureole. The Δ>18`O and Δ>13`C compositions of the carbonates form a linear cluster with a positive slope of ∼ 5, consistent with the depletion of isotope compositions by the infiltration of magmatic and/or meteoric fluids. Stable isotope compositions of coexisting calcite-dolomite pairs show varying degrees of isotopic disequilibrium, which correlates with the inferred fluid infiltration mechanism. The largest fractions are found in dolostones that have been infiltrated along pre-metamorphic fractures, and the smallest occur where fluid flow was pervasive. 
650 7 |a Aureoles  |2 georeft 
650 7 |a C-13  |2 georeft 
650 7 |a Carbon  |2 georeft 
650 7 |a Carbonates  |2 georeft 
650 7 |a Circulation  |2 georeft 
650 7 |a Contact metamorphism  |2 georeft 
650 7 |a Fluid phase  |2 georeft 
650 7 |a Geochemistry  |2 georeft 
650 7 |a Hydrothermal conditions  |2 georeft 
650 7 |a Isotope ratios  |2 georeft 
650 7 |a Isotopes  |2 georeft 
650 7 |a Metamorphic rocks  |2 georeft 
650 7 |a Metamorphism  |2 georeft 
650 7 |a Metasedimentary rocks  |2 georeft 
650 7 |a O-18/O-16  |2 georeft 
650 7 |a Oxygen  |2 georeft 
650 7 |a Stable isotopes  |2 georeft 
651 7 |a Europe  |2 georeft 
651 7 |a Great Britain  |2 georeft 
651 7 |a Hebrides  |2 georeft 
651 7 |a Highland region Scotland  |2 georeft 
651 7 |a Inner Hebrides  |2 georeft 
651 7 |a Inverness-shire Scotland  |2 georeft 
651 7 |a Isle of Skye  |2 georeft 
651 7 |a Scotland  |2 georeft 
651 7 |a United Kingdom  |2 georeft 
651 7 |a Western Europe  |2 georeft 
653 |a Balnakeil Formation 
653 |a Beinn an Dubhaich Granite 
700 1 |a Fallick, A. E.,  |e analytic author  |u Scottish Universities Research and Reactor Centre 
773 0 |t Journal of Metamorphic Geology  |d Oxford : Blackwell, Jan. 1997  |x 0263-4929  |n Journal of Metamorphic Geology, 15(1), p.71-83. Publisher: Blackwell, Oxford, United Kingdom. ISSN: 0263-4929 Publication type: journal article  |g Vol. 15, no. 1  |h illus., incl. 3 tables, geol. sketch map