| Reference Type | Journal (article/letter/editorial) |
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| Title | A geochemical study of Lewisian metasedimentary granulites and gneisses in the Scourie-Laxford area of the north-west Scotland |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Okeke, P. O. | Author |
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| Borley, G. D. | Author |
| Watson, J. | Author |
| Year | 1983 (March) | Volume | 47 |
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| Issue | 342 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_47/47-342-1.pdf+ |
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| DOI | doi:10.1180/minmag.1983.047.342.01Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 3463 | Long-form Identifier | mindat:1:5:3463:4 |
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| GUID | 0 |
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| Full Reference | Okeke, P. O., Borley, G. D., Watson, J. (1983) A geochemical study of Lewisian metasedimentary granulites and gneisses in the Scourie-Laxford area of the north-west Scotland. Mineralogical Magazine, 47 (342) 1-9 doi:10.1180/minmag.1983.047.342.01 |
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| Plain Text | Okeke, P. O., Borley, G. D., Watson, J. (1983) A geochemical study of Lewisian metasedimentary granulites and gneisses in the Scourie-Laxford area of the north-west Scotland. Mineralogical Magazine, 47 (342) 1-9 doi:10.1180/minmag.1983.047.342.01 |
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| In | (1983, March) Mineralogical Magazine Vol. 47 (342) Mineralogical Society |
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| Abstract/Notes | AbstractMajor element, trace element, and REE data for metasedimentary granulites and their retrogressed derivatives formed from Archaean parent-rocks at two localities in the Lewisian complex of north-west Scotland are presented.The metasedimentary rocks are enclosed in and intruded by metatonalites and related calc-alkaline rocks and have been highly deformed and metamorphosed along with these rocks. They are geochemically distinct from this meta-igneous suite and range from highly aluminous to highly siliceous types. Comparisons of major and trace element data with those for unmetamorphosed Archaean and post-Archaean sediments suggest that they are derived from a detrital shale-greywacke assemblage, which may have included a volcaniclastic component. High ΣREE and ΣLREE suggest that the source-rocks included fractionated felsic igneous rocks.Evidence that depletion in the large ion lithophile elements K, Rb, Th accompanied high-pressure granulite metamorphism supports the view, based on data derived from the associated meta-igneous rocks, that depletion was effected by active fluids rather than by abstraction of a partial melt and suggests that removal of K and Th began only when a considerable reduction of Rb had taken place. |
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