Ocean acidification in the aftermath of the Marinoan glaciation

Ohnemueller, F., Prave, A. R., Fallick, A. E. and Kasemann, S. A. (2014) Ocean acidification in the aftermath of the Marinoan glaciation. Geology, 42(12), pp. 1103-1106. (doi: 10.1130/G35937.1)

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Abstract

Boron isotope patterns preserved in cap carbonates deposited in the aftermath of the younger Cryogenian (Marinoan, ca. 635 Ma) glaciation confirm a temporary ocean acidification event on the continental margin of the southern Congo craton, Namibia. To test the significance of this acidification event and reconstruct Earth’s global seawater pH states at the Cryogenian-Ediacaran transition, we present a new boron isotope data set recorded in cap carbonates deposited on the Yangtze Platform in south China and on the Karatau microcontinent in Kazakhstan. Our compiled δ11B data reveal similar ocean pH patterns for all investigated cratons and confirm the presence of a global and synchronous ocean acidification event during the Marinoan deglacial period, compatible with elevated postglacial pCO2 concentrations. Differences in the details of the ocean acidification event point to regional distinctions in the buffering capacity of Ediacaran seawater.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fallick, Professor Anthony
Authors: Ohnemueller, F., Prave, A. R., Fallick, A. E., and Kasemann, S. A.
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Geology
Publisher:Geological Society of America
ISSN:0091-7613
ISSN (Online):1943-2682
Copyright Holders:Copyright © 2014 Geological Society of America
First Published:First published in Geology 42(12):1103-1106
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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