PP13D:
Authigenic Processes in Marine Sediment: Influence on Seawater Composition and the Paleoceanographic Record II

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Session ID#: 17397

Session Description:
The term "authigenic processes" describes a variety of biotic and abiotic reactions and mineralogical changes occurring on or beneath the seafloor. They are important to understanding fluxes and sinks of organic and inorganic species in the past and present, life in the subsurface, and, importantly, the mechanisms by which paleoceanographic proxies record previous climates and geochemical conditions. We aim to  address processes considered “authigenic” in order to better define what they are, how they are connected, and their chemical implications. The goal of this session is to explore the diversity of individual processes that are generically referred to as authigenic. We encourage perspectives from geochemical, microbiological, mineralogical, sediment provenance, and paleoceanographic research.
Primary Convener:  Claire Cecelia McKinley, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States
Conveners:  Chloe H Anderson, Boston University, Earth and Environment, Boston, United States, Ann G Dunlea, NIRVANA Laboratories, Woods Hole Oceanographic Institution, Woods Hole, MA, United States and Emily R Estes, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Chairs:  Chloe H Anderson, Boston University, Earth and Environment, Boston, United States, Ann G Dunlea, NIRVANA Laboratories, Woods Hole Oceanographic Institution, Woods Hole, MA, United States and Claire Cecelia McKinley, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States
OSPA Liaison:  Claire Cecelia McKinley, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States

Cross-Listed:
  • OS - Ocean Sciences
Index Terms:

1039 Alteration and weathering processes [GEOCHEMISTRY]
1050 Marine geochemistry [GEOCHEMISTRY]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4924 Geochemical tracers [PALEOCEANOGRAPHY]

Abstracts Submitted to this Session:

The Role of Authigenic Volcanic Ash in Marine Sediment (Invited) (159738)
Rachel Scudder, Texas A&M University College Station, College Station, TX, United States, Claire Cecelia McKinley, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States, Deborah Jane Thomas, Texas A&M University College Station, Oceanography, College Station, TX, United States and Richard W Murray, Boston University, Earth and Environment, Boston, MA, United States
Examining Trace Phase Influence on Authigenic Neodymium Isotope Records (173926)
April N Abbott, Macquarie University, Earth and Planetary Sciences, Sydney, Australia and Stefan Loehr, University of Adelaide, Adelaide, SA, Australia
Dissolved Nd isotope ratios along the US GEOTRACES Eastern Pacific Zonal Transect (188768)
Chandranath Basak1, Jesse Muratli2, Yingzhe Wu3, Brian A Haley4, Steven L Goldstein5 and Leopoldo D Pena3,6, (1)Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (3)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (4)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, (5)Lamont-Doherty Earth Observatory, Palisades, United States, (6)Universitat de Barcelona. Facultat de Ciencies de la Terra, Dinàmica de la Terra i de l'Oceà, Barcelona, Spain
Uranium-234 anomalies in authigenic uranium as a new oxygenation proxy in the Southern Ocean (123749)
Christopher T Hayes, University of Southern Mississippi, Stennis Space Center, United States, Silke Severmann, Rutgers University, Department of Marine & Coastal Sciences, New Brunswick, NJ, United States and Amy Anderson, Rutgers University, New Brunswick, NJ, United States
Chromium Isotope Compositions of Shells and Surface Seawater - a First Look at the Potential of Cr in Marine Skeletal Carbonates as a Seawater Redox Archive (117408)
Robert Frei1,2, Sylvie Bruggmann2 and Cora Paulukat1,3, (1)University of Copenhagen, Geoscience and Natural Resource Management, København K, Denmark, (2)University of Copenhagen, Geosciences and Natural Resource Management, København K, Denmark, (3)ALS Scandinavia AB, Luleå, Sweden
Paired measurements of K and Mg isotopes and clay authigenesis in marine sediments (193510)
Danielle Priscilla Santiago Ramos, Rutgers University, Department of Marine and Coastal Sciences, New Brunswick, United States, Ann G Dunlea, NIRVANA Laboratories, Woods Hole Oceanographic Institution, Woods Hole, MA, United States and John A Higgins, Princeton University, Princeton, United States
Authigenic Carbonate Fans from Lower Jurassic Marine Shales (Alberta, Canada) (198465)
Rowan C Martindale1, Theodore R Them II2, Benjamin C Gill2 and Andrew H Knoll3, (1)University of Texas at Austin, Earth and Planetary Sciences, Austin, TX, United States, (2)Virginia Polytechnic Institute and State University, Blacksburg, VA, United States, (3)Harvard University, Cambridge, MA, United States
TEXTURAL AND ISOTOPIC EVIDENCE FOR SILICA CEMENTATION IN ~1.88 GA GRANULAR IRON FORMATION (183544)
Latisha Ashley Brengman, University of Minnesota Duluth, Earth and Environmental Sciences, Duluth, MN, United States, Christopher Fedo, University of Tennessee, Department of Earth and Planetary Sciences, Knoxville, TN, United States and Martin J Whitehouse, Swedish Museum of Natural History, Department of Geosciences, Stockholm, Sweden

See more of: Paleoceanography and Paleoclimatology