PP033
Systematics and Applications of Redox Proxies from Precambrian to Pleistocene
Session ID#: 71708
Session Description:
Earth has undergone many dramatic transformations throughout its evolutionary history. These changes arose from a complex interplay of biological, geological and climate system processes, some of which are still acting on our planet. Reliable redox proxies are critical for understanding the coevolution of Earth’s climate and its biology on planetary timescales, as well as ocean-atmosphere CO2 partitioning during Pleistocene glacial cycles. This session welcomes contributions using elemental (e.g. Mn, I, U, Re, Mo, etc) and isotopic (e.g. δ238U, δ98Mo, δ53Cr, δ66Zn, ε205Tl, etc) proxies to study past atmospheric and oceanic redox state. Submissions examining proxy systematics in modern settings, effects of diagenesis on proxy records, and proxy applications to different timescales and magnitudes of redox change (e.g. Precambrian vs. Pleistocene) are particularly encouraged.
Co-Sponsor(s):
Index Terms:
1030 Geochemical cycles [GEOCHEMISTRY]
1051 Sedimentary geochemistry [GEOCHEMISTRY]
4912 Biogeochemical cycles, processes, and modeling [PALEOCEANOGRAPHY]
4924 Geochemical tracers [PALEOCEANOGRAPHY]
Primary Convener: Frank J Pavia, Lamont Doherty Earth Observatory, Palisades, NY, United States
Conveners: Allison W Jacobel, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States and Kassandra Costa, Woods Hole Oceanographic Institution, Department of Geology & Geophysics, Woods Hole, MA, United States
Primary Liaison: Frank J Pavia, Lamont Doherty Earth Observatory, Palisades, NY, United States
Cadmium and Chromium Isotope Signatures of Metalliferous Black Shales – Addressing Bioproductivity and Ocean Redox During the Precambrian-Cambrian Transition on the Yangtze Platform, China. (485256)
Robert Frei1, Bernd Lehmann2, Lingang Xu3, Jesper Allan Frederiksen4 and Elias John Rugen4, (1)University of Copenhagen, Geosciences and Natural Resource Management, København K, Denmark, (2)Technische Univ, Clausthal Zellerfeld, Germany, (3)China University of Geosciences, School of Earth Sciences and Resources, Beijing, China, (4)University of Copenhagen, Geosciences and Natural Resource Management, Copenhagen, Denmark
Authigenic Mn as a Proxy for Southern Ocean Bottom Water Ventilation During Last Deglaciation (503083)
Shouyi Wang1, Frank J Pavia2, Robert F Anderson2 and Richard w Murray1, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)Lamont-Doherty Earth Obs, Palisades, NY, United States
Can authigenic uranium quantitatively reconstruct bottom water oxygen in the west tropical Atlantic? (507738)
Kassandra Costa, Woods Hole Oceanographic Institution, Department of Geology & Geophysics, Woods Hole, MA, United States and Delia Oppo, WHOI, Geology and Geophysics, Woods Hole, MA, United States
Impact of phosphatization events across the Rio Grande Rise (Southwest Atlantic) during the Miocene (511933)
Mariana Benites, Universidade de Sao Paulo, São Paulo, São Paulo, Brazil, James R Hein, U.S. Geological Survey, Santa Cruz, CA, United States, Kira Mizell, University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States and Luigi Jovane, Oceanographic Institute of the University of São Paulo, Department of Fisical Oceanography, São Paulo, Brazil
Oxygen Variability on the Central Chile Margin Across the Last Glacial Cycle (Invited) (512684)
Zanna Chase, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, Axel Durand, Institute for Marine and Antarctic Studies, Taroona, TAS, Australia, Rebecca S Robinson, University of Rhode Island, Narragansett, RI, United States and James McManus, Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States
Upper ocean redox reconstructions of the Late Ordovician (Hirnantian) positive carbon isotope excursion: potential linkages to glaciation and mass extinction (518502)
Wanyi Lu1, Maya Elrick2, Menghan Li3, Dongping Hu3, Ruliang He1, André Desrochers4, Yanan Shen3 and Zunli Lu1, (1)Syracuse University, Syracuse, NY, United States, (2)University of New Mexico Main Campus, Albuquerque, NM, United States, (3)University of Science and Technology of China, Hefei, China, (4)University of Ottawa, Ottawa, ON, Canada
Middle Paleozoic global-ocean redox trends based on uranium isotopes from marine limestones and their relationship to paleobiologic, carbon-cycle, and climatic changes (518654)
Maya Elrick, University of New Mexico Main Campus, Albuquerque, NM, United States, Geoffrey J Gilleaudeau, George Mason University Fairfax, Atmosphere, Oceans, and Earth Sciences, Fairfax, United States, Stephen J Romaniello, University of Tennessee, Knoxville, NY, United States, Chadlin M Ostrander, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, Thomas J Algeo, University of Cincinnati, Department of Geology, Cincinnati, OH, United States and Jennifer L Morford, Franklin & Marshall College, Lancaster, PA, United States
Detecting Southern Ocean Circulation Changes during Past Interglacial Periods using Manganese and Rhenium (519303)
Evan Rohde1, Samuel Glasscock1 and Chris T Hayes2, (1)University of Southern Mississippi, School of Ocean Science and Engineering, Stennis Space Center, MS, United States, (2)University of Southern Mississippi, Stennis Space Center, MS, United States
Molybdenum speciation in Late Cretaceous Western Interior Seaway sediments: Implications for trace metal proxies (Invited) (523308)
Allyson Tessin, University of Leeds, Austin, Tx, United States, Anthony Chappaz, Central Michigan University, Institute for Great Lakes Research - Dept. of Earth and Atmospheric Sciences - Dept. of Chemistry and Biochemistry, Mount Pleasant, MI, United States, Ingrid L Hendy, University of Michigan Ann Arbor, Earth and Environmental Sciences, Ann Arbor, MI, United States and Nathan D Sheldon, Univ of MI-Earth and Environmental Sciences, Ann Arbor, MI, United States
Ice Age Storage of Carbon and Oxygen in the Abyssal Pacific Ocean (538517)
Allison W Jacobel1, Robert F Anderson2, Timothy Herbert3, Sam Jaccard4, Jerry F McManus5, Frank J Pavia2 and Gisela Winckler6, (1)Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States, (2)Lamont-Doherty Earth Obs, Palisades, NY, United States, (3)Brown University, Earth, Environmental and Planetary Sciences, Providence, RI, United States, (4)University of Bern, Bern, Switzerland, (5)Columbia U. / LDEO, Palisades, NY, United States, (6)Columbia University, Lamont-Doherty Earth Observatory, New York, NY, United States
Sedimentary Vanadium Isotope Signatures from An Oxygen Transect across the California Mexico Margin (588279)
Siqi Li1, Jeremy D Owens2, Jane Wadhams3, Sean Newby3, Silke Severmann4 and Fei Wu5, (1)Florida State University, Tallahassee, FL, United States, (2)Woods Hole Oceanographic Institute, Woods Hole, MA, United States, (3)Florida State University, Department of Earth, Ocean, and Atmospheric Science, Tallahassee, United States, (4)Rutgers University, New Brunswick, NJ, United States, (5)Macquarie University, Sydney, Australia
