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Garnets from the Upper Swat Hornblendic Group, Swat District, Pakistan. Part I: Garnets from gneisses and pegmatites

Published online by Cambridge University Press:  05 July 2018

Zulfiqar Ahmed
Affiliation:
Department of Geology, University of the Punjab, Lahore (Pakistan)
Shafeeq Ahmed
Affiliation:
Department of Geology, University of the Punjab, Lahore (Pakistan)

Summary

Chemical analyses of eleven garnets from orthogneisses and related pegmatites, belonging to the Upper Swat Hornblendic Group, Pakistan, are presented along with the petrographic descriptions of the host rocks. The garnets show dominant almandine content, followed by grossular pyrope, spessartine, and andradite, in order of relative abundance. One garnet sample is different from the rest in having higher andradite and spessartine contents and higher refractive index, and is also different in habit. This is the first detailed study of garnets from Pakistan.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1975

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References

Cinner, (G. A.), 1960. Pelitic Gneisses with varying Ferrous/Ferric Ratios from Glen Clova, Angus, Scotland. Journ. Petrology, 1, 178-217.CrossRefGoogle Scholar
Davis, (R. G.), 1965. The nature of the Upper Swat Hornblendic Group of Martin et al. (1962). Geol. Bull. Punjab Univ. No. 2, 5-152.Google Scholar
Deer, (W. A.), Howle (.R. A.), and Zussmann, (J.), 1962. Rock Forming Minerals. London (Longmans), 1, 77.Google Scholar
Jan, (M. Q.) and Kempe, (D. R. C.), 1973. The petrology of the basic and intermediate rocks of Upper Swat, Pakistan. Geol. Mag. 110 (3), 285300.CrossRefGoogle Scholar
Leake, (B. E.), 1972. Garnetiferous striped amphibolites from Connemara, Western Ireland. Min. Mag. 35, 649-65.CrossRefGoogle Scholar
Martin, (N. R.), Siddiqui, (S. F. A.), and King, (B. H.), 1962. A geological reconnaissance of the region between the Lower Swat and Indus rivers of West Pakistan. Geol. Bull. Punjab Univ. No. 2, 1-14.Google Scholar
Němec, (D.), 1967. The miscibility of the pyralspite and grandite molecules in garnets. Min. Mag. 36, 389-402.Google Scholar