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The emplacement of pahoehoe lavas on Kilauea and in the Deccan Traps

DSpace at IIT Bombay

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Title The emplacement of pahoehoe lavas on Kilauea and in the Deccan Traps
 
Creator SHETH, HC
 
Subject flood-basalt emplacement
volcanic province
india
flows
age
crust
geochemistry
constraints
extinctions
transition
volcanism
lava
kilauea
hawaii
deccan
flood basalt
 
Description There is a growing interest in deciphering the emplacement and environmental impact of flood basalt provinces such as the Deccan, India. Observations of active volcanism lead to meaningful interpretations of now-extinct volcanic systems. Here, I illustrate and discuss the morphology and emplacement of the modern and active lava flows of Kilauea volcano in Hawaii, and based on them, interpret the compound pahoehoe lavas of the Deccan Traps. The latter are vastly larger (areally extensive and voluminous) than Kilauea flows, and yet, their internal architecture is the same as that of Kilauea flows, and even the sizes of individual flow units often identical. Many or most compound flows of the Deccan Traps were emplaced in a gentle, effusive, Kilauea-like fashion. Bulk eruption rates for the Deccan province are unknown, and were probably high, but the local eruption rates of the compound flows were no larger than Kilauea's. Large (>= 1000 km(3)) individual compound pahoehoe flows in the Deccan could have been emplaced at Kilauea-like local eruption rates (1 m(3)/sec per metre length of fissure) in a decade or less, given fissures of sufficient length (tens of kilometres), now exposed as dyke swarms in the province.
 
Publisher INDIAN ACADEMY SCIENCES
 
Date 2011-08-02T08:41:23Z
2011-12-26T12:53:47Z
2011-12-27T05:40:49Z
2011-08-02T08:41:23Z
2011-12-26T12:53:47Z
2011-12-27T05:40:49Z
2006
 
Type Article
 
Identifier JOURNAL OF EARTH SYSTEM SCIENCE, 115(6), 615-629
0253-4126
http://dx.doi.org/10.1007/s12040-006-0007-x
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8729
http://hdl.handle.net/10054/8729
 
Language en