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A new stratigraphic framework built on U-Pb single-zircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil)

2018; Geological Society of America; Volume: 130; Issue: 5-6 Linguagem: Inglês

10.1130/b31775.1

1943-2674

Neil Griffis, Roland Mundil, Isabel P. Montañez, John L. Isbell, Nicholas D. Fedorchuk, Fernando Farias Vesely, Roberto Iannuzzi, Qing‐Zhu Yin,

Paleontology and Stratigraphy of Fossils

Research Article| January 04, 2018 A new stratigraphic framework built on U-Pb single-zircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil) Neil Patrick Griffis; Neil Patrick Griffis † 1Department of Earth and Planetary Sciences, University of California, Davis, California 95616, USA †npgriffis@ucdavis.edu Search for other works by this author on: GSW Google Scholar Roland Mundil; Roland Mundil 2Berkeley Geochronology Center, Berkeley, California 94709, USA Search for other works by this author on: GSW Google Scholar Isabel Patricia Montañez; Isabel Patricia Montañez 1Department of Earth and Planetary Sciences, University of California, Davis, California 95616, USA Search for other works by this author on: GSW Google Scholar John Isbell; John Isbell 3Department of Geosciences, University of Wisconsin, Milwaukee, Wisconsin 53211, USA Search for other works by this author on: GSW Google Scholar Nicholas Fedorchuk; Nicholas Fedorchuk 3Department of Geosciences, University of Wisconsin, Milwaukee, Wisconsin 53211, USA Search for other works by this author on: GSW Google Scholar Fernando Vesely; Fernando Vesely 4Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, 80060-000, Brazil Search for other works by this author on: GSW Google Scholar Roberto Iannuzzi; Roberto Iannuzzi 5Departamento de Paleontologia e Estratigrafia, Universidade Federal Rio Grande do Sul, Porto Alegre, RS, 90040-060, Brazil Search for other works by this author on: GSW Google Scholar Qing-Zhu Yin Qing-Zhu Yin 1Department of Earth and Planetary Sciences, University of California, Davis, California 95616, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Neil Patrick Griffis † 1Department of Earth and Planetary Sciences, University of California, Davis, California 95616, USA Roland Mundil 2Berkeley Geochronology Center, Berkeley, California 94709, USA Isabel Patricia Montañez 1Department of Earth and Planetary Sciences, University of California, Davis, California 95616, USA John Isbell 3Department of Geosciences, University of Wisconsin, Milwaukee, Wisconsin 53211, USA Nicholas Fedorchuk 3Department of Geosciences, University of Wisconsin, Milwaukee, Wisconsin 53211, USA Fernando Vesely 4Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, 80060-000, Brazil Roberto Iannuzzi 5Departamento de Paleontologia e Estratigrafia, Universidade Federal Rio Grande do Sul, Porto Alegre, RS, 90040-060, Brazil Qing-Zhu Yin 1Department of Earth and Planetary Sciences, University of California, Davis, California 95616, USA †npgriffis@ucdavis.edu Publisher: Geological Society of America Received: 22 Jan 2017 Revision Received: 05 Sep 2017 Accepted: 27 Nov 2017 First Online: 04 Jan 2018 Online Issn: 1943-2674 Print Issn: 0016-7606 © 2018 Geological Society of America GSA Bulletin (2018) 130 (5-6): 848–858. https://doi.org/10.1130/B31775.1 Article history Received: 22 Jan 2017 Revision Received: 05 Sep 2017 Accepted: 27 Nov 2017 First Online: 04 Jan 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Neil Patrick Griffis, Roland Mundil, Isabel Patricia Montañez, John Isbell, Nicholas Fedorchuk, Fernando Vesely, Roberto Iannuzzi, Qing-Zhu Yin; A new stratigraphic framework built on U-Pb single-zircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil). GSA Bulletin 2018;; 130 (5-6): 848–858. doi: https://doi.org/10.1130/B31775.1 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 SocietyGSA Bulletin Search Advanced Search Abstract The timing of the late Paleozoic glaciation and its terminal deglaciation in the Paraná Basin, Brazil, is unconstrained and prohibits correlation of the Paraná Basin ice record with other high-latitude Gondwanan and low-latitude contemporaneous records. Here, we reexamine the existing U-Pb framework for the Carboniferous–Permian Paraná succession through high-precision, single-crystal chemical abrasion–thermal ionization mass spectrometry (CA-TIMS) analysis of individual zircons from tonsteins and subaerial volcanic ash deposits, which overlie sedimentary deposits with glacial indicators. The new ages document two distinct volcanic intervals and define a substantially new and revised chronostratigraphy for postglacial coal-bearing intervals in the southern Paraná Basin. The new CA-TIMS ages further indicate that glaciation in south-central Gondwana, long considered to be Early Permian, is entirely Carboniferous in age and that terminal deglaciation in this key west-central Gondwanan basin occurred near the Permian-Carboniferous boundary. Single-crystal U-Pb CA-TIMS ages from the ice-proximal high-latitude basins of southern Africa and Australia are needed to test the synchronicity of late Paleozoic glaciation and deglaciation events throughout Gondwana, with implications for empirical- and model-based paleoclimate reconstructions. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.