Observations on the Nepheline Syenites of Koraput, Orissa
- 17 April 1964
- journal article
- research article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 101 (6) , 558-563
- https://doi.org/10.1017/s0016756800050135
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.Keywords
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