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The Karoo Large Igneous Province: brevity, origin and relation with mass extinction in question from new 40Ar/39Ar age data.

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Authors
Jourdan, Fred
Feraud, G.
Bertrand, H.
Kampunzu, A.
Tshoso, G.
Watkeys, M.
Le Gall, B.
Date
2005
Type
Journal Article

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Jourdan, Fred and Feraud, Gilbert and Bertrand, Herve and Kampunzu, Ali Bashira and Tshoso, Gomotsang and Watkeys, Michael K. and Le Gall, Bernard. 2005. The Karoo Large Igneous Province: brevity, origin and relation with mass extinction questioned by new 40Ar/39Ar age data: Reply. Geology. 33 (1): pp. 745-748.
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Geology
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Department of Applied Geology
Faculty of Science and Engineering
WA School of Mines
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Abstract

Riley et al. (2006a) question our interpretations of 40Ar/39Ar data obtained on the Karoo fl ood basalts (Jourdan, et al., 2005). We believe their arguments are partially based on (1) poorly reliable 40Ar/39Ar age data (e.g., analyses of whole rocks that might have suffered hardly detectable alteration, recoil, etc.), and (2) mis-interpretation of the reliable geochronological data available on Karoo and other continential flood basalts (CFBs).