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Feldspars and pryoxenes from the charnockite aeries of Visakhapatnam area, Andhra Pradesh, India1

Published online by Cambridge University Press:  14 March 2018

M. S. Murty
M. S. Murty*
Affiliation:
Geology Department, Sri Venkateswara University, Tirupati, India
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Summary

A twin-law study of the plagioclase indicated metamorphic origin of the charnockites and volcanic origin of the basic members of the charnockite series. The original volcanic products have been influenced by the later metamorphism, resulting in the various basic members. The twinning in the plagioclase is considered to be primary. The perthite in the charnockite is of orthoclase variety and indicates a higher temperature of formation than the charnockites of other areas containing microcline. The orthopyroxene in the charnockite series is hypersthene and the clinopyroxene is sahlite. Hypersthene is inferred to have formed at the expense of sahlite, hornblende, biotite, and garnet.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 270 , June 1965 , pp. 393 - 400
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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Footnotes

1

This forms a summary of part of the thesis accepted for the degree of Doctor of Science by the Andhra University, Waltair, in 1961.

References

Alling, (H. L.), 1921. Journ. Geol., vol. 29, pp. 193–294.Google Scholar
Alling, (H. L.), 1938. Ibid., vol. 46, pp. 142–165.Google Scholar
Coulson, (A. L.), 1932. Rec. Geol. Surv. India, vol. 65, pp. 173–184.Google Scholar
Crookshank, (H.), 1938. Ibid., vol. 73, pp. 398–434.Google Scholar
Donnay, (J. D. H.), 1943. Bull. Geol. Soc. Amer., vol. 54, pp. 1645–1651.Google Scholar
Gorai, (M.), 1951. Amer. Min., vol. 36, pp. 884–901.Google Scholar
Groves, (A. W.), 1935. Quart. Jour. Geol. Soc., vol. 91, pp. 150–207.Google Scholar
Harker, (H. H.), 1954. Geol. Mag., vol. 91, p. 129.CrossRefGoogle Scholar
Hess, (H. H.), 1941. Amer. Min., vol. 26, pp. 515–585 and 573-594.Google Scholar
Hess, (H. H.) and Phllips, (A. H.), 1938. Ibid., vol. 23, pp. 450–456.Google Scholar
Hess, (H. H.), 1940. Ibid., vol. 25, pp. 271–285.Google Scholar
Holland, (T. H.), 1900. Mem. Geol. Surv. India, vol. 28, pp. 119–249.Google Scholar
Mackenzie, (W. S.), 1954. Min. Mag., vol. 30, pp. 354–366.Google Scholar
Muir, (I. D.) and Tilley, (C. E.), 1958. Geol. Mag., vol. 95, pp. 403–408.Google Scholar
Murty, (M. S.), 1962. Indian Min., vol. 3, no. I, pp. 43–50.Google Scholar
Murty, (M. S.), 1964. Nature, vol. 202, pp. 283–284.Google Scholar
Spencer, (E.), 1930. Min. Mag., vol. 22, pp. 291–367.Google Scholar
Sriramadas, (A.), 1956. Proc. Indian Acad. Sci., vol. 44R, pp. 338–344.CrossRefGoogle Scholar
Sriramadas, (A.) and Murty, (M. S.), 1963. Ibid., vol. 58, pp. 49–56.Google Scholar
Turner, (F. J.), 1947. Amer. Min., vol. 32, pp. 389–410.Google Scholar