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Progressive environmental deterioration in northwestern Pangea leading to the latest Permian extinction

2015; Geological Society of America; Volume: 127; Issue: 9-10 Linguagem: Inglês

10.1130/b31197.1

1943-2674

Stephen E. Grasby, Benoı̂t Beauchamp, David P.G. Bond, Paul Wignall, Cristina Talavera, Jennifer M. Galloway, Karsten Piepjohn, Lutz Reinhardt, Dierk Blomeier,

Geochemistry and Elemental Analysis

Research Article| September 01, 2015 Progressive environmental deterioration in northwestern Pangea leading to the latest Permian extinction Stephen E. Grasby; Stephen E. Grasby † 1Geological Survey of Canada, Natural Resources Canada, 3303 33rd Street NW, Calgary, Alberta T2L 2A7, Canada2Department of Geoscience, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada †E-mail: sgrasby@nrcan.gc.ca Search for other works by this author on: GSW Google Scholar Benoit Beauchamp; Benoit Beauchamp 2Department of Geoscience, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada Search for other works by this author on: GSW Google Scholar David P.G. Bond; David P.G. Bond 3Department of Geography, Environment and Earth Sciences, University of Hull, Hull HU6 7RX, UK Search for other works by this author on: GSW Google Scholar Paul Wignall; Paul Wignall 4School of Earth Sciences, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK Search for other works by this author on: GSW Google Scholar Cristina Talavera; Cristina Talavera 5Department of Imaging and Applied Physics, Curtin University, Kent Street, Bentley, WA 6102, Australia Search for other works by this author on: GSW Google Scholar Jennifer M. Galloway; Jennifer M. Galloway 1Geological Survey of Canada, Natural Resources Canada, 3303 33rd Street NW, Calgary, Alberta T2L 2A7, Canada Search for other works by this author on: GSW Google Scholar Karsten Piepjohn; Karsten Piepjohn 6Bundesanstalt für Geowissenschaften und Rohstoffe, Geozentrum Hannover, Stilleweg 2, D-30655 Hannover, Germany Search for other works by this author on: GSW Google Scholar Lutz Reinhardt; Lutz Reinhardt 6Bundesanstalt für Geowissenschaften und Rohstoffe, Geozentrum Hannover, Stilleweg 2, D-30655 Hannover, Germany Search for other works by this author on: GSW Google Scholar Dierk Blomeier Dierk Blomeier 7Millennia Stratigraphic Consultants, 35 Swansfield, Lechlade GL7 3SF, UK Search for other works by this author on: GSW Google Scholar GSA Bulletin (2015) 127 (9-10): 1331–1347. https://doi.org/10.1130/B31197.1 Article history received: 25 Aug 2014 rev-recd: 09 Dec 2014 accepted: 24 Feb 2015 first online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Stephen E. Grasby, Benoit Beauchamp, David P.G. Bond, Paul Wignall, Cristina Talavera, Jennifer M. Galloway, Karsten Piepjohn, Lutz Reinhardt, Dierk Blomeier; Progressive environmental deterioration in northwestern Pangea leading to the latest Permian extinction. GSA Bulletin 2015;; 127 (9-10): 1331–1347. doi: https://doi.org/10.1130/B31197.1 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 Stratigraphic records from northwestern Pangea provide unique insight into global processes that occurred during the latest Permian extinction (LPE). We examined a detailed geochemical record of the Festningen section, Spitsbergen. A stepwise extinction is noted as: starting with (1) loss of carbonate shelly macrofauna, followed by (2) loss of siliceous sponges in conjunction with an abrupt change in ichnofabrics as well as dramatic change in the terrestrial environment, and (3) final loss of all trace fossils. We interpret loss of carbonate producers as related to shoaling of the lysocline in higher latitudes, in relationship to building atmospheric CO2. The loss of siliceous sponges is coincident with the global LPE event and is related to onset of high loading rates of toxic metals (Hg, As, Co) that we suggest are derived from Siberian Trap eruptions. The final extinction stage is coincident with redox-sensitive trace metal and other proxy data that suggest onset of anoxia after the other extinction events. These results show a remarkable record of progressive environmental deterioration in northwestern Pangea during the extinction crises. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.