Articles | Volume 20, issue 1
https://doi.org/10.5194/cp-20-25-2024
https://doi.org/10.5194/cp-20-25-2024
Research article
 | 
03 Jan 2024
Research article |  | 03 Jan 2024

Nonlinear increase in seawater 87Sr ∕ 86Sr in the Oligocene to early Miocene and implications for climate-sensitive weathering

Heather M. Stoll, Leopoldo D. Pena, Ivan Hernandez-Almeida, José Guitián, Thomas Tanner, and Heiko Pälike

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Cited articles

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De Vleeschouwer, D., Vahlenkamp, M., Crucifix, M., and Pälike, H.: Alternating Southern and Northern Hemisphere climate response to astronomical forcing during the past 35 my, Geology, 45, 375–378, https://doi.org/10.1130/G38663.1, 2017. 
Egger, L. M., Bahr, A., Friedrich, O., Wilson, P. A., Norris, R. D., van Peer, T. E., Lippert, P. C., Liebrand, D., and Pross, J.: Sea-level and surface-water change in the western North Atlantic across the Oligocene–Miocene Transition: a palynological perspective from IODP Site U1406 (Newfoundland margin), Mar. Micropaleontol., 139, 57–71, https://doi.org/10.1016/j.marmicro.2017.11.003, 2018. 
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The Oligocene and early Miocene periods featured dynamic glacial cycles on Antarctica. In this paper, we use Sr isotopes in marine carbonate sediments to document a change in the location and intensity of continental weathering during short periods of very intense Antarctic glaciation. Potentially, the weathering intensity of old continental rocks on Antarctica was reduced during glaciation. We also show improved age models for correlation of Southern Ocean and North Atlantic sediments.