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New Ar-39-Ar-40 ages of dykes from Madhya Pradesh and Chhattisgarh: evidence for polyphase dyke intrusion in eastern Deccan Volcanic Province

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Title New Ar-39-Ar-40 ages of dykes from Madhya Pradesh and Chhattisgarh: evidence for polyphase dyke intrusion in eastern Deccan Volcanic Province
 
Creator LALA, T
MOMBASAWALA, LS
PANDE, K
PAUL, DK
 
Subject Argon dating
lava flows
mafic dykes
volcanic burst
FLOOD BASALTS
K-AR
INDIA
TRAPS
GEOCHRONOLOGY
CONSTRAINTS
DURATION
BOUNDARY
ROCKS
 
Description Mafic dykes constitute an important component of the Deccan Volcanic Province. The duration of Deccan volcanism was from 69 to 63 Ma with a peak at 65 +/- 1 Ma. The thickness of the lava flows is much reduced and intensity of dyke occurrence is much less in the eastern part of the province compared to the western part. Here we report new Ar-39-Ar-40 plateau ages of 60.1 +/- 0.3 Ma (2 sigma) and 82.3 +/- 0.7 Ma (2 sigma) of two mafic dykes from Shandol (Madhya Pradesh) and Chirimiri (Chhattisgarh), which indicate polyphase dyke intrusion in the eastern Deccan Volcanic Province.
 
Publisher INDIAN ACAD SCIENCES
 
Date 2014-12-29T06:41:31Z
2014-12-29T06:41:31Z
2014
 
Type Article
 
Identifier CURRENT SCIENCE, 107(6)1027-1032
0011-3891
http://dspace.library.iitb.ac.in/jspui/handle/100/17335
 
Language English