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A Simple Grid Deviation Technique of Study of the Areal Composition Variations in Granitic Bodies

Published online by Cambridge University Press:  01 May 2009

Ajit Kumar Saha
Ajit Kumar Saha
Affiliation:
Department of Geology, Presidency College, Calcutta, India.
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Abstract

A method of preparing grid deviation maps for the representation of the areal composition variations in granitic bodies is described. A comparative study of this method and the trend surface method by using the data of forty-five modal analyses of Bahalda hornblende granodiorite indicates greater effectiveness of the former in several respects.

Type
Articles
Information
Geological Magazine , Volume 101 , Issue 2 , 17 April 1964 , pp. 145 - 149
Copyright
Copyright © Cambridge University Press 1964

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References

REFERENCES

Chayes, F., 1949. A simple point counter for thin section analysis. Amer. Min., 34, 1–11.Google Scholar
Chayes, F., 1949 a, in Fairbairn, H. W., Structural Petrology of deformed rocks. Addison-Wesley Inc.Google Scholar
Chayes, F., 1952. The finer-grained calc-alkaline granites of New England. J. Geol., 60, 207–254.CrossRefGoogle Scholar
Chayes, F., 1961. Numerical Petrography. Carnegie Inst. Wash. Yearbook, 60, 158–165.Google Scholar
Fairbairn, H. W. et al. , 1951. Precision and accuracy of chemical, spectro-chemical and modal analysis of silicate rocks. Bull. U.S. geol. Surv., 980.Google Scholar
Krumbein, W. C., 1959. Trend surface analysis of contour type maps with irregular control-point spacing. J. Geophys. Res., 64, 823–834.CrossRefGoogle Scholar
Saha, A. K., 1954. The granodiorites around Bahalda Road, Mayurbhanj. Quart. J. Geol. Min. Met. Soc. India, 26, 87–104.Google Scholar
Saha, A. K., 1959. Emplacement of three granitic plutons in south-eastern Ontario, Canada. Bull. geol. Soc. Amer., 71, 1293–1326.CrossRefGoogle Scholar
Saha, A. K., 1963. Systematic quantitative areal variation in five grantic massifs: a Discussion. J. Geol., 70, 116–118.CrossRefGoogle Scholar
Saha, A. K., and Chakraborti, S. K., 1963. A quantitative petrological study of the Bahalda Road granodiorite, Mayurbhanj. J. Deccan Geol. Min. Soc., 3, 50–59.Google Scholar
Whitten, E. H. T., 1957. The Gola granite (Co. Donegal) and its regional setting. Proc. Roy. Irish Acad., 58B, 245–292.Google Scholar
Whitten, E. H. T., 1959. Composition trends in a granite: modal variation and ghost stratigraphy in a part of Donegal granite, Eire. J. Geophys. Res., 64, 835–848.CrossRefGoogle Scholar
Whitten, E. H. T., 1961. Systematic quantitative areal variations in five granitic massifs from India, Canada, and Great Britian. J. Geol., 69, 619–646.CrossRefGoogle Scholar