Analcite from the Neoproterozoic Peralkaline Dykes of Southern Karnataka

Authors

  • T. C. Devaraju
     Department of Studies in Geology, Karnatak University, Dharwad - 580 003
  • K. Laajoki
     Institute of Geosciences and Astronomy, Department of Geology, University of Oulu, Linnanmaa, SF-90570
  • H. Makkonen
     Institute of Geosciences and Astronomy, Department of Geology, University of Oulu, Linnanmaa, SF-90570

Abstract

Analcite with the chemical formula close to Na15Al16Si32O96 occurs as one of the important groundmass minerals of some of the peralkaline Neoproterozoic dykes in Southern Karnataka. Observations suggest its formation upon emplacement, at low temperature, from a soda-enriched and silica deficient residual melt, after intratelluric preemplacement crystallization of K-feldspar and alkali pyroxene phenocrysts.

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Issue

Volume 48, Issue 5, November 1996

Section

Short Communications

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Published

1996-11-01

How to Cite

Devaraju, T. C., Laajoki, K., & Makkonen, H. (1996). Analcite from the Neoproterozoic Peralkaline Dykes of Southern Karnataka. Journal of Geological Society of India, 48(5), 579–582. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/68690

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