V13E:
What Do We Really Know about Early Earth? II Posters

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Session ID#: 13766

Session Description:
Geologic evidence of the conditions of early Earth is sparse, forcing our models, experiments, and ultimately interpretations of early Earth processes to be based upon limited physical evidence. As we attempt to make more from less, many of us find ourselves asking: What do we really know about early Earth? From the depths of the inner core to the atmosphere-space boundary, how has the Earth system changed? This intentionally provocative framing forces us to reexamine long-held assumptions about the evolution of climate, tectonics, and biogeochemical cycles, with implications for our understanding of life’s origins, of the future of the Earth system, and of early Earth’s suitability as an analog for exoplanet habitability. We invite contributions from the solid Earth, biogeoscience, ocean, and atmosphere communities that help reassess or reaffirm what we think we know about the early Earth system and its subsequent evolution.
Primary Convener:  Ariel D Anbar, Arizona State University, School of Earth and Space Exploration and School of Molecular Sciences, Tempe, AZ, United States; Arizona State University, School of Earth & Space Exploration and School of Molecular Sciences, Tempe, AZ, United States
Conveners:  Chadlin M Ostrander, Arizona State University, School of Earth and Space Exploration, Tempe, United States, Aleisha Johnson, Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States and Cin-Ty Lee, Rice University, Houston, TX, United States
Chairs:  Chadlin M Ostrander, Arizona State University, School of Earth and Space Exploration, Tempe, United States and Aleisha Johnson, Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States
OSPA Liaison:  Aleisha Johnson, Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States

Cross-Listed:
  • B - Biogeosciences
Index Terms:

0325 Evolution of the atmosphere [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0444 Evolutionary geobiology [BIOGEOSCIENCES]
3621 Mantle processes [MINERALOGY AND PETROLOGY]
5225 Early environment of Earth [PLANETARY SCIENCES: ASTROBIOLOGY]

Abstracts Submitted to this Session:

Molybdenum isotopes in modern marine hydrothermal Fe/Mn deposits: Implications for Archean and Paleoproterozoic Mo cycles (127553)
Kosuke T Goto, Geological Survey of Japan, Tsukuba, Japan, James R Hein, USGS Pacific Coastal and Marine Science Center Santa Cruz, Santa Cruz, CA, United States, Gen Shimoda, Sangyo Gijutsu Sogo Ken, Tsukuba, Japan, Shogo Aoki, University of Tokyo, Tokyo, Japan, Akira Ishikawa, Tokyo Institute of Technology, Earth and Planetary Sciences, Tokyo, Japan, Katsuhiko Suzuki, Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Resources Utilization, Kanagawa, Japan, Gwyneth Williams Gordon, Arizona State Univ, METAL Lab, Tempe, AZ, United States and Ariel D Anbar, Arizona State University, School of Earth and Space Exploration and School of Molecular Sciences, Tempe, AZ, United States
Early Earth slab stagnation (147017)
Jeroen Van Hunen, University of Durham, Department of Earth Sciences, Durham, United Kingdom and Roberto Agrusta, University of Durham, Durham, DH1, United Kingdom
Consequences of an Immense Hadean-Archean Heat Flux that Results from Virial Theorem Constraints on the Earth’s Initial Axial Spin (183382)
Anne M Hofmeister and Robert E Criss, Washington University in St Louis, St. Louis, MO, United States
Looking Backwards in Time to the Early Earth Using the Lens of Stable Isotope Geodynamic Cycles (193885)
Robert T Gregory, Southern Methodist University, Earth Sciences, Dallas, TX, United States
Stratigraphy and Age of Paleoproterozoic Birimian Volcaniclastic Sequence in the Cape Three Points area, Axim-Konongo (Ashanti) Belt, Southwest Ghana (196524)
Satoshi Yoshimaru1, Shoichi Kiyokawa2, Takashi Ito3, Minoru Ikehara4, Kenji Horie5, Mami Takehara5, Takashi Sano6, Frank K Nyame7 and George M Tetteh8, (1)Kyushu University, Fukuoka, Japan, (2)Kyushu University, Department of Earth and Planetary Science, Fukuoka, Japan, (3)Ibaraki University, Faculty of Education, Mito, Japan, (4)Kochi University, Center for Advanced Marine Core Research, Nankoku, Japan, (5)NIPR National Institute of Polar Research, Tokyo, Japan, (6)National Museum of Nature and Science, Ibaraki, Japan, (7)University of Ghana, Accra, Ghana, (8)university of mine and technology at Tarkwa, Geology, Tarawa, Ghana
What do we Really Know About the Origins of Banded Iron Formations? (199127)
Parker Castleberry, Arizona State University, Tempe, AZ, United States, Stephen J Romaniello, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States and Ariel D Anbar, Arizona State University, School of Earth and Space Exploration and School of Molecular Sciences, Tempe, AZ, United States

See more of: Volcanology, Geochemistry and Petrology