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Continental weathering following a Cryogenian glaciation : evidence from calcium and magnesium isotopes
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dc.contributor.author | Kasemann, S.A. | |
dc.contributor.author | Pogge von Strandmann, P.A.E. | |
dc.contributor.author | Prave, A.R. | |
dc.contributor.author | Fallick, A.E. | |
dc.contributor.author | Elliott, T. | |
dc.contributor.author | Hoffmann, K.-H. | |
dc.date.accessioned | 2015-06-10T15:10:04Z | |
dc.date.available | 2015-06-10T15:10:04Z | |
dc.date.issued | 2014-06-15 | |
dc.identifier.citation | Kasemann , S A , Pogge von Strandmann , P A E , Prave , A R , Fallick , A E , Elliott , T & Hoffmann , K-H 2014 , ' Continental weathering following a Cryogenian glaciation : evidence from calcium and magnesium isotopes ' , Earth and Planetary Science Letters , vol. 396 , pp. 66-77 . https://doi.org/10.1016/j.epsl.2014.03.048 | en |
dc.identifier.issn | 0012-821X | |
dc.identifier.other | PURE: 194398587 | |
dc.identifier.other | PURE UUID: 4173ab75-292f-4907-b711-d61329736a95 | |
dc.identifier.other | Scopus: 84898910779 | |
dc.identifier.other | WOS: 000336819900007 | |
dc.identifier.other | ORCID: /0000-0002-4614-3774/work/64033716 | |
dc.identifier.uri | https://hdl.handle.net/10023/6798 | |
dc.description | This work was funded by a Natural Environment Research Council New Investigator Award (NE/C507529/1) to SAK. PPvS is funded by NERC Research Fellowship NE/1020571/1. | en |
dc.description.abstract | A marked ocean acidification event and elevated atmospheric carbon dioxide concentrations following the extreme environmental conditions of the younger Cryogenian glaciation have been inferred from boron isotope measurements. Calcium and magnesium isotope analyses offer additional insights into the processes occurring during this time. Data from Neoproterozoic sections in Namibia indicate that following the end of glaciation the continental weathering flux transitioned from being of mixed carbonate and silicate character to a silicate-dominated one. Combined with the effects of primary dolomite formation in the cap dolostones, this caused the ocean to depart from a state of acidification and return to higher pH after climatic amelioration. Differences in the magnitude of stratigraphic isotopic changes across the continental margin of the southern Congo craton shelf point to local influences modifying and amplifying the global signal, which need to be considered in order to avoid overestimation of the worldwide chemical weathering flux. | |
dc.format.extent | 12 | |
dc.language.iso | eng | |
dc.relation.ispartof | Earth and Planetary Science Letters | en |
dc.rights | © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (http://creativecommons.org/licenses/by-nc-nd/4.0/) | en |
dc.subject | Calcium isotopes | en |
dc.subject | Magnesium isotopes | en |
dc.subject | Continental weathering | en |
dc.subject | Cap carbonates | en |
dc.subject | Neoproterozoic | en |
dc.subject | GE Environmental Sciences | en |
dc.subject | BDC | en |
dc.subject | R2C | en |
dc.subject | SDG 14 - Life Below Water | en |
dc.subject.lcc | GE | en |
dc.title | Continental weathering following a Cryogenian glaciation : evidence from calcium and magnesium isotopes | en |
dc.type | Journal article | en |
dc.description.version | Postprint | en |
dc.contributor.institution | University of St Andrews. School of Earth & Environmental Sciences | en |
dc.contributor.institution | University of St Andrews. Marine Alliance for Science & Technology Scotland | en |
dc.contributor.institution | University of St Andrews. Scottish Oceans Institute | en |
dc.contributor.institution | University of St Andrews. St Andrews Sustainability Institute | en |
dc.contributor.institution | University of St Andrews. St Andrews Isotope Geochemistry | en |
dc.contributor.institution | University of St Andrews. Earth and Environmental Sciences | en |
dc.contributor.institution | University of St Andrews. School of Geography and Geosciences | en |
dc.identifier.doi | https://doi.org/10.1016/j.epsl.2014.03.048 | |
dc.description.status | Peer reviewed | en |
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