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The mineral paragenesis and metamorphic status of garnet-hornblende-pyroxene-scapolite gneiss from Ghana (Gold Coast)

Published online by Cambridge University Press:  14 March 2018

O. von Knorring  and
W. Q. Kennedy
O. von Knorring
Affiliation:
Dept. of Geology, University of Leeds
W. Q. Kennedy
Affiliation:
Dept. of Geology, University of Leeds
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Summary

The main minerals (garnet, pyroxene, hornblende, and scapolite) in certain Dahomeyan (Archaean) garnet-hornblende-pyroxene-scapolite gneisses from Ghana have been separated and analysed. Both the garnet and the pyroxene show marked eclogitic affinities, and the rocks are considered to occupy a transitional position between the amphibolite and eclogite facies. The scapolite is a sulphatic variety containing more than 4 % SO3 and is believed to be a product of autometasomatism. A revised scheme for the distribution of mineral facies within the temperature-pressure field of metamorphism is proposed.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 31 , Issue 241 , June 1958 , pp. 846 - 859
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1958

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References

Alderman, (A. R.), 1936. Eclogites in the neighbourhood of Glenelg, Inverness. shire. Quart. Journ. Geol. Soc., Vol. 92, p. 488.CrossRefGoogle Scholar
Borgström, (L. H.), 1913. Die Skapolithlagerstätte von Laurinkari. Bull. Comm. Géol. Finlande, No. 41.Google Scholar
Buddington, (A. F.), 1939. Adirondack igneous rocks and their metamorphism. Geol. Soc. Amen, Mem. 7.Google Scholar
Edwards, (A. B.) and Baker, (G.), 1953. Scapolitization in the Cloncurry district of North-western Queensland. Journ. Geol. Soc. Australia, Vol. 1, p. 1 [M.A. 12-421].Google Scholar
Eskola, (P.), 1920. The mineral facies of rocks. Norsk. Geol. Tidsskr., Vol. 6, p. 143.Google Scholar
Eskola, (P.), 1921. On the eclogites of Norway. Skrifter Vidensk.-selskab. Kristiania. I. Mat.-Nat. Kl., no. 8 [M.A. 2-313].Google Scholar
Hall, (A. L.), 1938. Analyses of rocks, minerals, ores, etc., from southern Africa. Dept. Mines, Geol. Surv. Mem. no. 32.Google Scholar
Junner, (N. R.) and Bates, (D. A.), 1945. Reports on the geology and hydrology of the coastal area east of the Akwapim range. Gold Coast Geol. Surv. Mere., no. 7.Google Scholar
[Korzhinsky, (D. S.)] Kopдинский, (Д. C.), 1937. [Dependence of mineral stability on the depth.] 3aП. Bcepocc. Mин. OбIII. (Mém. Soc. Russe Min.), Vol. 66, no. 2, p. 369.Google Scholar
Niggli, (P.), 1926. Lehrbuch der Mineralogie, Vol. 2. Berlin, Borntraeger.Google Scholar
Parras, (K.), 1941. Das Gebiet der Pyroxen führenden Gasteine im westlichen Uusimaa in Südfinnland. Geol. Bundschau (Suomi-Finnland Heft), Bd. 32, p. 484.Google Scholar
Ramberg, (H.), 1952. The origin of metamorphic and metasomatie rocks. Univ. Chicago Press.Google Scholar
Robertson, (E. C.), Birch, (F.), and MacDonald, (G. J. F.). 1957. Experimental determination of jadeite stability relations to 25 000 bars. Amer. Journ. Sci., Vol. 255, p. 115.Google Scholar
Sundius, (N.), 1918. Beiträtge zur Kenntnis der Skapolithe. Bull. Geol. Inst. Univ. Upsala, Vol. 16. p. 96.Google Scholar
Tilley, (C. E.), 1937. The paragenesis of kyanite-amphibolites. Min. Mag., Vol. 24, p. 555.Google Scholar
Turner, (F. J.) and Verhoogen, (J.), 1951. Igneous and Metamorphic Petrology. New York, McGraw-Hill Book Co., Inc.Google Scholar