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Age estimation of the Deccan Traps from the North American apparent polar wander pathIt has recently been proposed that flood basalt events, such as the eruption of the Deccan Traps, have been responsible for mass extinctions. To test this hypothesis, accurate estimations of the ages and duration of these events are needed. In the case of the Deccan Traps, however, neither age nor duration of emplacement is well constrianed; measured ages range from 40 to more than 80 Myr, and estimates of duration range from less than 1 to 67 Myr. To make an independent age determination, paleomagnetic and sea-floor-spreading data are used, and the associated errors are estimated. The Deccan paleomagnetic pole is compared with the reference apparent polar wander path of North America by rotating the positions of the paleomagnetic pole for the Deccan Traps to the reference path for a range of assumed ages. Uncertainties in the apparent polar wander path, Deccan paleopole position, and errors resulting from the plate reconstruction are estimated. It is suggested that 83-70 Myr is the most likely time of extrusion of these volcanic rocks.
Document ID
19890032477
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Stoddard, Paul R.
(Northwestern Univ. Evanston, IL, United States)
Jurdy, Donna M.
(Northwestern University Evanston, IL, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1988
Publication Information
Publication: Geology
ISSN: 0091-7613
Subject Category
Geophysics
Accession Number
89A19848
Funding Number(s)
CONTRACT_GRANT: NAS5-885
CONTRACT_GRANT: NSF EAR-87-08558
Distribution Limits
Public
Copyright
Other

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