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Paleomagnetic Constraints on the Permian-Triassic Boundary in Terrestrial Strata of the Karoo Supergroup, South Africa: Implications for Causes of the End-Permian Extinction Event

De Kock, M. O. and Kirschvink, J. L. (2004) Paleomagnetic Constraints on the Permian-Triassic Boundary in Terrestrial Strata of the Karoo Supergroup, South Africa: Implications for Causes of the End-Permian Extinction Event. Gondwana Research, 7 (1). pp. 175-183. ISSN 1342-937X. doi:10.1016/S1342-937X(05)70316-6. https://resolver.caltech.edu/CaltechAUTHORS:20130111-082506399

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Abstract

The closure of the Palaeozoic witnessed the greatest biotic crisis in earth history. Surprisingly little is known about the effects and timing of the terrestrial counterpart of the well-described End-Permian mass extinction from known marine successions worldwide. In the present study, reliable paleomagnetic results were obtained from a PT boundary section in the terrestrial Karoo Basin of South Africa. Permo-Triassic aged mudstones from a locality in the Eastern Cape Province yielded two magnetic chrons, reverse followed by normal (with the boundary possibly close to the reversal). This extends to results from a previous study: thereby jointly identifying a R/N/R polarity pattern for this boundary interval. The PTB interval is constrained below the red mudstones of the Beaufort Group at the present locality and within reverse-magnetised green mudstone, implying a diachronic relation between the marine and terrestrial End-Permian mass extinction events.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/S1342-937X(05)70316-6DOIUNSPECIFIED
http://www.sciencedirect.com/science/article/pii/S1342937X05703166PublisherUNSPECIFIED
ORCID:
AuthorORCID
Kirschvink, J. L.0000-0001-9486-6689
Additional Information:© 2004 International Association for Gondwana Research, Japan. Manuscript received August 30,2002; accepted May 16, 2003.
Subject Keywords:Permian-Triassic boundary; extinction; paleomagnetism; Karoo Supergroup; South Africa
Issue or Number:1
DOI:10.1016/S1342-937X(05)70316-6
Record Number:CaltechAUTHORS:20130111-082506399
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130111-082506399
Official Citation:M.O. De Kock, J.L. Kirschvink, Paleomagnetic Constraints on the Permian-Triassic Boundary in Terrestrial Strata of the Karoo Supergroup, South Africa: Implications for Causes of the End-Permian Extinction Event, Gondwana Research, Volume 7, Issue 1, January 2004, Pages 175-183, ISSN 1342-937X, 10.1016/S1342-937X(05)70316-6.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36311
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:11 Jan 2013 22:06
Last Modified:09 Nov 2021 23:21

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