Vitric Tuff from Archipelago Group (Mio-Pliocene), South Andaman

Authors

  • Tapan pal
     Project: Andaman, Op: WSA, ER, GSI, GSI Complex, Karunamoyee, DK Block, Salt Lake, Kolkata - 700 091
  • T. Dutta Gupta
     Project: Andaman, Op: WSA, ER, GSI, GSI Complex, Karunamoyee, DK Block, Salt Lake, Kolkata - 700 091
  • S. C. Das Gupta
     Project: Andaman, Op: WSA, ER, GSI, GSI Complex, Karunamoyee, DK Block, Salt Lake, Kolkata - 700 091

Keywords:

Vitric tuff (dacitic), Mio-Pliocene, South Andaman.

Abstract

Vitric tuff is being reported from Archipelago Group of South Andaman. The tuff is composed of delicately shaped glass shards with variable amount of microlites and broken phenocrysts of quartz, plagioclase and mica. Major oxide analyses show dacitic composition of the tuff. Petrographic and XRD studies show that the glass is altered to clinoptilolite and analcime. The sedimentary structures in tuff beds suggest these as products of ash turbidite.

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Issue

Volume 59, Issue 2, February 2002

Section

Research Papers

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Published

2002-02-01

How to Cite

pal, T., Dutta Gupta, T., & Das Gupta, S. C. (2002). Vitric Tuff from Archipelago Group (Mio-Pliocene), South Andaman. Journal of Geological Society of India, 59(2), 111–114. Retrieved from http://www.geosocindia.com/index.php/jgsi/article/view/83824

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