B21A:
(Bio-isotopic) Message in a (Rock Record) Bottle Revisited: Who Wrote It, How Did It Get Here, and What Does It Tell Us? I Posters

Submit an Abstract to this Session



Session ID#: 27775

Session Description:
Signals of microbial life have expanded beyond physical fossil evidence to include molecular, elemental, and isotopic signatures. There has been an explosion in the application of stable isotope proxies used to investigate the rock record. In this exciting geochemical ‘gold-rush’ it is critical that solid connections to modern microbial, physical and (geo)chemically ground-truthed constraints be established, particularly with regard to the production and preservation of bio-isotopic signatures.We invite contributions from any period of Earth history, including modern natural and experimental analogues, using new or established methods for detecting microbial biosignals. Our goal is to provide a platform for studies that seek to elucidate mechanisms of biosignal formation, those that illuminate the preservation potential and fidelity of such proxies. Such studies move us toward a mechanistically grounded understanding of the co-evolution of life and its expression in the geological record.
Primary Convener:  Jeff R Havig, University of Minnesota, Earth Sciences, Minneapolis, United States
Conveners:  Alexandra v Turchyn, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, Andrew D Czaja, University of Cincinnati Main Campus, Department of Geosciences, Cincinnati, United States and William Leavitt, Dartmouth College, Earth Sciences, Hanover, United States
Chairs:  Jeff R Havig, University of Minnesota, Earth Sciences, Minneapolis, United States and Alexandra v Turchyn, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom
OSPA Liaison:  Jeff R Havig, University of Minnesota, Earth Sciences, Minneapolis, United States
Index Terms:

0424 Biosignatures and proxies [BIOGEOSCIENCES]
0454 Isotopic composition and chemistry [BIOGEOSCIENCES]
0465 Microbiology: ecology, physiology and genomics [BIOGEOSCIENCES]
1099 General or miscellaneous [GEOCHEMISTRY]

Abstracts Submitted to this Session:

The Real Difference between Biotic and Abiotic Methane (219353)
Xiaobin Cao, Huiming Bao and Yongbo Peng, Louisiana State University, Department of Geology & Geophysics, Baton Rouge, LA, United States
Effect of seawater contamination on modeled sulfur isotope fractionation during microbial sulfate reduction (ODP Leg 201, Site 1226) (232638)
Man-Yin Tsang, University of Washington, School of Oceanography, Seattle, United States and Ulrich G G Wortmann, University of Toronto, Department of Earth Sciences, Toronto, ON, Canada
Ocean acidification and the δ15N record of Paleozoic epeiric seas (236269)
Michael L Tuite Jr, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States and Kenneth H Williford, California Institute of Technology, Jet Propulsion Laboratory, Pasadena, CA, United States
Endolithic Boring Enhance the Deep-sea Carbonate Lithification on the Southwest Indian Ridge (237073)
Xiaotong Peng, Sanya Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China and Hengchao Xu, CAS Chinese Academy of Sciences, Beijng, China
Uranium isotope fractionation in biogenic carbonates: biological effects (267331)
Xinming Chen, Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States, Stephen J Romaniello, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, Achim Dirk Herrmann, Louisiana State University, Coastal Studies Institute and Department of Geology and Geophysics, Baton Rouge, United States and Ariel D Anbar, Arizona State University, School of Earth & Space Exploration and School of Molecular Sciences, Tempe, AZ, United States
Hydrogen isotopic messages in sulfate reducer lipids: a recorder of metabolic state? (284883)
William Leavitt1, Alice Zhou2, Alec Cobban2, Melanie Suess3 and Alexander S Bradley4, (1)Dartmouth College, Earth Sciences, Hanover, United States, (2)Dartmouth College, Earth Sciences, Hanover, NH, United States, (3)Washington University in St. Louis, Earth & Planetary Sciences, St. Louis, MO, United States, (4)Washington University in St. Louis, Department of Earth, Environmental, and Planetary Sciences, St. Louis, United States
Origin of sulfur for elemental sulfur concentration in salt dome cap rocks, Gulf Coast Basin, USA (290565)
John Michael Hill, California State University Fullerton, Fullerton, CA, United States, Richard Kyle, University of Texas at Austin, Geology, Austin, TX, United States and Sean J Loyd, California State University Fullerton, Department of Geological Sciences, Fullerton, CA, United States
Sediment Sulfur Isotopes Reflect Seawater Oxygen Rise in Neoarchean (207051)
Mojtaba Fakhraee, Yale University, New Haven, United States, Sean Crowe, University of British Columbia, Department of Microbiology and Immunology, Vancouver, BC, Canada and Sergei Katsev, University of Minnesota Duluth, Department of Physics and Astronomy, Duluth, United States

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