CT011
Understanding Rare Earth Element (REE) distributions and isotopic ratios and the mechanisms behind their use as tracers of (paleo)oceanic processes
Session ID#: 84457
Session Description:
Analytical advances have enabled a significant increase of environmental REE abundance and isotopic (e.g. Nd, Ce) data. These elements are increasingly recognized as promising tracers for elucidating past and present natural and man-made processes in a variety of aquatic environments. However, in spite of this growth in observations, our understanding of the mechanisms, capabilities and limitations of geochemical proxies based on REE abundances and isotopic ratios remains incomplete. We therefore invite presentations of field, laboratory, or modeling studies of REEs and related isotope systems aimed specifically at exploring mechanistic connections between their geochemical behavior and observed distributions in marine and terrestrial waters and sediments. Of particular interest are investigations linking REE abundance distributions to Nd or Ce isotopic ratios; validating the use of REEs as proxies of paleoceanographic processes; and addressing REE fractionation and source-to-sink transport on a global scale and at "geochemical hotspots" like estuaries, hydrothermal vents, nepheloid layers etc. Presentations that merely contribute TEI distribution data will be given lower priority. We especially encourage submissions from students and early-career scientists.
Index Terms:
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]
4808 Chemical tracers [OCEANOGRAPHY: CHEMICAL]
4825 Geochemistry [OCEANOGRAPHY: CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: CHEMICAL]
Primary Chair: Brian A Haley, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
Co-chairs: Torben Stichel, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, Johan Schijf, University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, Solomons, MD, United States and Vanessa Hatje, Universidade Federal da Bahia, Química Analítica - CIENAM, Salvador, Brazil
Primary Liaison: Torben Stichel, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany
Trace Element Sources and Fluxes in the Zonal Current System of the Western Tropical Pacific Ocean: Evidence From Combined Rare Earth Element, Nd Isotope Distributions and Physical Observations (Invited) (501104)
Melanie K. Behrens1, Katharina Pahnke1, Audrey Delpech2, Sophie E Cravatte2, Frederic Marin2 and Catherine Jeandel2, (1)Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Oldenburg, Germany, (2)LEGOS, Université de Toulouse, (IRD, CNES, CNRS, UPS), Toulouse, France
Simulation of global distribution of 231Pa and 230Th and its ratio in the ocean sediment by using an ocean general circulation model (642651)
Akira Oka, Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan, Yusuke Sasaki, Atmosphere and Ocean Research Institute, University of Tokyo, Japan and Hidetaka Kobayashi, Atmosphere and Ocean Research Institute University of Tokyo, Tokyo, Japan
Rare Earth Elements and Nd Isotopes as Tracers of Modern Ocean Circulation in the Central Mediterranean Sea (642970)
Ester Garcia-Solsona1, Leopoldo D Pena1, Eduardo Paredes1, José Noel Pérez-Asensio1, Lucía Quirós-Collazos2, Fabrizio Lirer3 and Isabel Cacho Lascorz1, (1)Universitat de Barcelona. Facultat de Ciencies de la Terra, Dinàmica de la Terra i de l'Oceà, Barcelona, Spain, (2)Institut de Ciències del Mar. CSIC., Biologia Marina i Oceanografia, Barcelona, Spain, (3)CNR-IAMC, Napoli, Italy
Rare earth elements cycling and speciation across the chemocline of the Pettaquamscutt River estuary, Rhode Island (643475)
Segun Biodun Adebayo, Tulane University of Louisiana, New Orleans, LA, United States, Minming Cui, Johns Hopkins University, Earth and Planetary Sciences, Balitmore, MD, United States; Johns Hopkins University, Department of Earth & Planetary Sciences, Baltimore, MD, United States, Omolola Akintomide, Tulane University, Department of Earth and Environmental Sciences, New Orleans, LA, United States, Roger P Kelly, URI GSO, Narragansett, RI, United States and Karen Haley Johannesson, Tulane Univ Earth&Environ Sci, New Orleans, LA, United States
Land-ocean inputs traced by Rare Earth Elements and Neodymium isotopic composition in the Solomon Sea (649914)
Quoc Viet Pham1, Susanna Marie Michael2, Moustafa Belhadj1, Melanie Grenier3, Sophie E Cravatte4 and Catherine Jeandel4, (1)LEGOS/CNRS, TIM, Toulouse, France, (2)University of Washington, Oceanography, Seattle, WA, United States, (3)LEGOS/CNRS, Toulouse, France, (4)LEGOS, Université de Toulouse, (IRD, CNES, CNRS, UPS), Toulouse, France
Short-term variability of dissolved rare earth elements and neodymium isotopes in the entire water column of the Panama Basin (654586)
Patricia Grasse1, Ed Hathorne1, Katharina Pahnke2, Philipp Böning3 and Martin Frank4, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Germany, (3)Institute for Chemistry and Biology of the Marine Environment (ICBM), Max-Planck Research Group for Marine Isotope Geochemistry, University of Oldenburg, Oldenburg, Germany, (4)GEOMAR Helmholtz Center for Ocean Research Kiel, Kiel, Germany
Factors controlling distribution of Rare Earth Elements in Aragonitic Skeletons of Deep-Sea Scleractinian Corals explored with Laser Ablation Inductively Coupled Plasma Mass Spectrometry (655078)
Maria Prokopenko1, Mudit Murarka1, Austin Cordova1, Jess F Adkins2 and Laura Robinson3, (1)Pomona College, Claremont, CA, United States, (2)California Institute of Technology, Pasadena, CA, United States, (3)University of Bristol, United Kingdom
