Oxidative elemental cycling under the low O2 Eoarchean atmosphere
dc.contributor.author | Frei, Robert | |
dc.contributor.author | Crowe, Sean A. | |
dc.contributor.author | Bau, Michael | |
dc.contributor.author | Polat, Ali | |
dc.contributor.author | Fowle, David A. | |
dc.contributor.author | Dossing, Lasse N. | |
dc.date.accessioned | 2016-03-07T22:11:53Z | |
dc.date.available | 2016-03-07T22:11:53Z | |
dc.date.issued | 2016-02-01 | |
dc.identifier.citation | Oxidative elemental cycling under the low O2 Eoarchean atmosphere Robert Frei, Sean A. Crowe, Michael Bau, Ali Polat, David A. Fowle, Lasse N. Døssing Sci Rep. 2016; 6: 21058. Published online 2016 February 11. doi: 10.1038/srep21058 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/20486 | |
dc.description.abstract | The Great Oxidation Event signals the first large-scale oxygenation of the atmosphere roughly 2.4 Gyr ago. Geochemical signals diagnostic of oxidative weathering, however, extend as far back as 3.3–2.9 Gyr ago. 3.8–3.7 Gyr old rocks from Isua, Greenland stand as a deep time outpost, recording information on Earth’s earliest surface chemistry and the low oxygen primordial biosphere. Here we find fractionated Cr isotopes, relative to the igneous silicate Earth reservoir, in metamorphosed banded iron formations (BIFs) from Isua that indicate oxidative Cr cycling 3.8–3.7 Gyr ago. Elevated U/Th ratios in these BIFs relative to the contemporary crust, also signal oxidative mobilization of U. We suggest that reactive oxygen species were present in the Eoarchean surface environment, under a very low oxygen atmosphere, inducing oxidative elemental cycling during the deposition of the Isua BIFs and possibly supporting early aerobic biology. | en_US |
dc.publisher | Nature Publishing Group | en_US |
dc.rights | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.rights.uri | http://hdl.handle.net/1808/19898 | |
dc.title | Oxidative elemental cycling under the low O2 Eoarchean atmosphere | en_US |
dc.type | Article | |
kusw.kuauthor | Fowle, David Allen | |
kusw.kudepartment | Environmental Studies Program | en_US |
dc.identifier.doi | 10.1038/srep21058 | |
kusw.oaversion | Scholarly/refereed, publisher version | |
kusw.oapolicy | This item meets KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess |
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