SG21A:
The Geologic History of Atmospheric Oxygen: Models and Proxies

Submit an Abstract to this Session

Session ID#: 6107

Session Description:
Atmospheric oxygen has risen spasmodically in concentration by five to eleven orders of magnitude over geologic time. Consequently, Earth’s surface environment has been repeatedly transformed. However, the regulating feedbacks on oxygen concentration at ancient or contemporary levels remain inadequately known. In this session, new insights from atmospheric and biogeochemical modelling will jostle with improved proxy reconstructions of atmospheric redox history. We welcome contributions concerning pO2 on any and all geologic time scales, Anthropocene to Hadean.
OSPA Liaison:  Karlis Muehlenbachs, University of Alberta, Earth and Atmopsheric Scdiences, Edmonton, AB, Canada
Chairs:  Paul F Hoffman, Harvard Univ, Cambridge, MA, United States; University of Victoria, Victoria, BC, Canada and Karlis Muehlenbachs, University of Alberta, Earth and Atmopsheric Scdiences, Edmonton, AB, Canada
Primary Convener:  Paul F Hoffman, University of Victoria, Victoria, BC, Canada; University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
Conveners:  Karlis Muehlenbachs, University of Alberta, Earth and Atmopsheric Scdiences, Edmonton, AB, Canada, Boswell A Wing, University of Colorado Boulder, Geological Sciences, Boulder, United States and Noah Planavsky, Yale University, Department of Earth and Planetary Sciences, New Haven, CT, United States
Index Terms:

0325 Evolution of the atmosphere [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0444 Evolutionary geobiology [BIOGEOSCIENCES]
1009 Geochemical modeling [GEOCHEMISTRY]
Co-Sponsor(s):
  • AS - Atmospheric Sciences
  • B - Biogeosciences
  • PP - Paleoceanography and Paleoclimatology
  • VGP - Volcanology, Geochemistry, and Petrology

Abstracts Submitted to this Session:

SG21A-01
Measuring terrestrial Precambrian atmospheric oxygen levels: An isotopic approach (36012)
David Auerbach Colwyn1, Noah Planavsky2, Christopher T. Reinhard3, J Barry Maynard4, Axel Hofmann5, Nadezhda Alfimova6, Xiangli Shaun Wang7, Bleuenn Gueguen7 and Dan Asael8, (1)Yale University, Geology & Geophysics, New Haven, CT, United States, (2)Yale University, Department of Earth and Planetary Sciences, New Haven, CT, United States, (3)Georgia Institute of Technology Main Campus, School of Earth and Atmospheric Sciences, Atlanta, United States, (4)University of Cincinnati, Department of Geology, Cincinnati, OH, United States, (5)University of Johannesburg, Auckland Park, South Africa, (6)Russian Academy of Sciences, Institute of Precambrian Geology and Geochronology, St. Petersburg, Russia, (7)Yale University, New Haven, CT, United States, (8)Yale University, Dept. of Geology and Geolphysics, New Haven, CT, United States
SG21A-02
Hyperventilation During the Paleoproterozoic – Evidence for Extensive Oxidation of Terrestrial Surfaces in Fennoscandia (35951)
Kyle Rybacki1, Lee Robert Kump2, Weiqiang Li3,4, Clark Johnson3, Ronny Schoenberg5, Victor Melezhik6 and Eero Hanski7, (1)Pennsylvania State University Main Campus, University Park, PA, United States, (2)Pennsylvania State University Main Campus, Department of Geosciences, University Park, PA, United States, (3)Univ. of Wisconsin - Madison, Madison, WI, United States, (4)Nanjing University, School of Earth Sciences and Engineering, Nanjing, China, (5)Tübingen University, Institute of Geosciences, Tübingen, Germany, (6)The Geologic Survey of Norway, Trondheim, Norway, (7)University of Oulu, Oulu Mining School, Oulu, Finland
SG21A-03
A Theory of Archean Oxygen Stability (35805)
Daniel P Schrag and Thomas Laakso, Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States
SG21A-04
Alkalinity, Snowball Glaciations, and the Great Oxidation Event (Invited) (35875)
Thomas Laakso, Harvard University, Cambridge, MA, United States and Daniel P Schrag, Harvard Univ, Cambridge, MA, United States
SG21A-05
Multiple Sulfur Isotopes in Neoproterozoic Pyrite: Implications for Links Between the Sulfur Cycle and Atmospheric Oxygen (36112)
Marcus Kunzmann1, Thi Hao Bui1, Boswell A Wing2, Galen P Halverson1 and Clinton T Scott3, (1)McGill University, Earth and Planetary Sciences, Montreal, QC, Canada, (2)University of Colorado Boulder, Geological Sciences, Boulder, United States, (3)USGS, Reston, VA, United States
SG21A-06
What influenced the rise and fall of atmospheric oxygen during the Phanerozoic? (34710)
Ralf Tappert1, Karlis Muehlenbachs2, Alexander P Wolfe2, Ryan C McKellar3 and Martin Schoell4, (1)University of Alberta, Edmonton, AB, Canada, (2)University of Alberta, Earth and Atmopsheric Scdiences, Edmonton, AB, Canada, (3)Royal Saskatchewan Museum, Regina, SK, Canada, (4)Retired, Washington, DC, United States
SG21A-07
Ordovician climate simulations with an earth system model: Focus on the impact of atmospheric O2 and CO2 on deep ocean oxygen concentrations (33836)
Daniel Frank D'Amico, Ohio State University, Department of Geography, Columbus, United States, Alvaro Montenegro, Ohio State University, Department of Geography, Columbus, OH, United States and Michael Eby, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
SG21A-08
Episodic Organic Carbon Burial During the Phanerozoic Indicated by a New Atmospheric pO2 Record resources.  (35923)
Martin Schoell, Retired, Washington, DC, United States
See more of: Sedimentary Geology and Paleobiology