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Linking paleocontinents through triple oxygen isotope anomalies

2017; Geological Society of America; Volume: 46; Issue: 2 Linguagem: Inglês

10.1130/g39470.1

1943-2682

Peter W. Crockford, Malcolm S.W. Hodgskiss, Gabriel J. Uhlein, Fabrício de Andrade Caxito, Justin A. Hayles, Galen P. Halverson,

Geochemistry and Elemental Analysis

Research Article| December 12, 2017 Linking paleocontinents through triple oxygen isotope anomalies Peter W. Crockford; Peter W. Crockford 1Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 0E8, Canada Search for other works by this author on: GSW Google Scholar Malcolm S.W. Hodgskiss; Malcolm S.W. Hodgskiss 1Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 0E8, Canada2Department of Geological Sciences, Stanford University, Stanford, California 94305, USA Search for other works by this author on: GSW Google Scholar Gabriel J. Uhlein; Gabriel J. Uhlein 3CPMTC–IGC (Centro de Pesquisas Professor Manoel Teixeira da Costa–Instituto de Geociências) Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil Search for other works by this author on: GSW Google Scholar Fabricio Caxito; Fabricio Caxito 3CPMTC–IGC (Centro de Pesquisas Professor Manoel Teixeira da Costa–Instituto de Geociências) Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil Search for other works by this author on: GSW Google Scholar Justin A. Hayles; Justin A. Hayles 4Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803, USA5Department of Earth, Environmental and Planetary Sciences, Rice University, Houston, Texas 77005, USA Search for other works by this author on: GSW Google Scholar Galen P. Halverson Galen P. Halverson 1Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 0E8, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Peter W. Crockford 1Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 0E8, Canada Malcolm S.W. Hodgskiss 1Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 0E8, Canada2Department of Geological Sciences, Stanford University, Stanford, California 94305, USA Gabriel J. Uhlein 3CPMTC–IGC (Centro de Pesquisas Professor Manoel Teixeira da Costa–Instituto de Geociências) Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil Fabricio Caxito 3CPMTC–IGC (Centro de Pesquisas Professor Manoel Teixeira da Costa–Instituto de Geociências) Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil Justin A. Hayles 4Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803, USA5Department of Earth, Environmental and Planetary Sciences, Rice University, Houston, Texas 77005, USA Galen P. Halverson 1Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 0E8, Canada Publisher: Geological Society of America Received: 30 Jun 2017 Revision Received: 19 Nov 2017 Accepted: 20 Nov 2017 First Online: 12 Dec 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2018) 46 (2): 179–182. https://doi.org/10.1130/G39470.1 Article history Received: 30 Jun 2017 Revision Received: 19 Nov 2017 Accepted: 20 Nov 2017 First Online: 12 Dec 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Peter W. Crockford, Malcolm S.W. Hodgskiss, Gabriel J. Uhlein, Fabricio Caxito, Justin A. Hayles, Galen P. Halverson; Linking paleocontinents through triple oxygen isotope anomalies. Geology 2017;; 46 (2): 179–182. doi: https://doi.org/10.1130/G39470.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract A central tenet of the Neoproterozoic snowball Earth hypothesis is that glaciations ended synchronously. Although this condition is borne out by U-Pb and Re-Os geochronology, the time scale of deglaciation is much less than the intrinsic error of the highest resolution dating techniques, and consequently calibrating the pace and synchronicity of biogeochemical recovery from Cryogenian glaciations remains a challenge. Given the importance of obtaining a globally synoptic view of paleoenvironmental conditions and biological evolution during these extraordinary transitions, robust correlations and chronologies are imperative. Here we extend the negative triple oxygen isotope (∆17O) anomaly previously documented in ca. 635 Ma postglacial cap carbonates to two new paleocontinents, Brazil and Norway. The global footprint of this geochemical signal coupled to its short duration provides a unique time datum that can be used to cross-correlate Marinoan postglacial cap carbonate sequences and track the geochemical evolution of the oceans during deglaciation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.