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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/3062

Title: Volcanology and eruptive styles of barren island: an active mafic stratovolcano in the andaman sea, ne indian ocean
Authors: SHETH, HC
RAY, JS
BHUTANI, R
KUMAR, A
SMITHA, RS
Keywords: volcanism
barren island
andaman and nicobar islands
india
indian ocean
andaman sea
Issue Date: 2009
Publisher: SPRINGER
Citation: BULLETIN OF VOLCANOLOGY,71(9)1021-1039
Abstract: Barren Island (India) is a relatively little studied, little known active volcano in the Andaman Sea, and the northernmost active volcano of the great Indonesian arc. The volcano is built of prehistoric (possibly late Pleistocene) lava flows (dominantly basalt and basaltic andesite, with minor andesite) intercalated with volcaniclastic deposits (tuff breccias, and ash beds deposited by pyroclastic falls and surges), which are exposed along a roughly circular caldera wall. There are indications of a complete phreatomagmatic tephra ring around the exposed base of the volcano. A polygenetic cinder cone has existed at the centre of the caldera and produced basalt-basaltic andesite aa and blocky aa lava flows, as well as tephra, during historic eruptions (1787-1832) and three recent eruptions (1991, 1994-95, 2005-06). The recent aa flows include a toothpaste aa flow, with tilted and overturned crustal slabs carried atop an aa core, as well as locally developed tumuli-like elliptical uplifts having corrugated crusts. Based on various evidence we infer that it belongs to either the 1991 or the 1994-95 eruptions. The volcano has recently (2008) begun yet another eruption, so far only of tephra. We make significantly different interpretations of several features of the volcano than previous workers. This study of the volcanology and eruptive styles of the Barren Island volcano lays the ground for detailed geochemical-isotopic and petrogenetic work, and provides clues to what the volcano can be expected to do in the future.
URI: http://dx.doi.org/10.1007/s00445-009-0280-z
http://dspace.library.iitb.ac.in/xmlui/handle/10054/13854
http://hdl.handle.net/100/3062
ISSN: 0258-8900
Appears in Collections:Review

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