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Observations on the Nepheline Syenites of Koraput, Orissa

Published online by Cambridge University Press:  01 May 2009

M. K. Bose
M. K. Bose
Affiliation:
Department of Geology, Presidency College, Calcutta.
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Abstract

The nepheline syenites of Koraput, Orissa, in eastern India, are described for the first time with mineralogical details. The major rock type is a hypersolvus nepheline syenite. The mafic minerals are iron-rich biotite and subordinate alkali ferrohastingsite, the latter coexisting with titanomagnetite. The crystallization history of the magma has been interpreted in the light of chemical data on the rock and coexisting nepheline and alkali feldspar.

Type
Articles
Information
Geological Magazine , Volume 101 , Issue 6 , 30 December 1964 , pp. 558 - 563
Copyright
Copyright © Cambridge University Press 1964

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References

REFERENCES

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