PP036
The Earth System during the Precambrian: life, climate, and tectonics
Session ID#: 82092
Session Description:
Innovative approaches that span field observations, laboratory experiments, and/or theoretical calculations that allow for quantitative constraints on a variety of geophysical, geochemical and biological processes. These efforts are already yielding a more comprehensive understanding of microbiology, biogeochemistry, climatic conditions, and links with tectonics of ancient Earth. This session seeks to bring together the latest contributions that focus on outstanding questions about secular evolution and critical intervals during the Precambrian. We welcome research topics that include: the rise of atmospheric oxygen, marine (de-)oxygenation at a range of scales, feedbacks between climate and chemical weathering, reconstructions of nutrient cycling and productivity, tectonic evolution, volatile inventory, and many others.
Index Terms:
0473 Paleoclimatology and paleoceanography [BIOGEOSCIENCES]
4870 Stable isotopes [OCEANOGRAPHY: CHEMICAL]
4912 Biogeochemical cycles, processes, and modeling [PALEOCEANOGRAPHY]
9619 Precambrian [INFORMATION RELATED TO GEOLOGIC TIME]
Primary Convener: Xinyang Chen, University of Washington, Isotope Laboratory, Earth and Space Sciences, Seattle, WA, United States
Conveners: Sanjoy M Som, Blue Marble Space Institute of Science, Seattle, WA, United States, Eva E Stüeken, University of St. Andrews, School of Earth and Environmental Sciences, St. Andrews, United Kingdom and Jeremy D Owens, Florida State University, Earth, Ocean and Atmospheric Science, Tallahassee, FL, United States
Primary Liaison: Xinyang Chen, University of Washington, Isotope Laboratory, Earth and Space Sciences, Seattle, WA, United States
Boron isotope constraints on Neoarchean ocean pH and climate (612395)
Xinyang Chen1, Fang-zhen Teng2, David C Catling2 and Roger Buick2, (1)University of Washington, Isotope Laboratory, Earth and Space Sciences, Seattle, WA, United States, (2)University of Washington, Earth and Space Sciences, Seattle, WA, United States
Pyritized filamentous fungi in silicified miniature paleo-speleothems of basal Ediacaran, Weng'an, South China (493847)
Tian Gan, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China, Taiyi Luo, Institue of Geochemistry, Chinese Academy of Sciences, Guiyang, China, Ke Pang, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China, Chuanming Zhou, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing, China, Guanghong Zhou, School of Geography and Resources, Guizhou Education University, Guiyang, China and Bin Wan, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, State Key Laboratory of Paleobiology and Stratigraphy, Nanjing, China
Textural and mineralogical characteristics of the <1710 Ma Freedom Formation compared to well-characterized, low-metamorphic grade Archean and Paleoproterozoic iron formations (504458)
Latisha Ashley Brengman, University of Minnesota Duluth, Earth and Environmental Sciences, Duluth, MN, United States and Esther Stewart, Wisconsin Geological and Natural History Survey, Madison, WI, United States
Rethinking the Ediacaran Sulfur Cycle (511054)
Wei Wang, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China, Chengguo Guan, State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing, China, Yongliang Hu, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences,, Nanjing, China and Chuanming Zhou, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing, China
Long-term Variation of Zircon Trace Element Composition (512714)
Charles Verdel, Northern Territory Geological Survey, Darwin, NT, Australia, Matthew James Campbell, University of Queensland, School of Earth and Environmental Sciences, St Lucia, QLD, Australia and Charlotte Allen, Queensland University of Technology, Central Analytical Research Facility, and Earth, Environmental and Biological Sciences, Brisbane, QLD, Australia
Revisiting the Precambrian carbon cycle: the influence of reverse weathering and alternative interpretations of the carbon isotope record (Invited) (528112)
Joshua Krissansen-Totton, University of Washington Seattle Campus, Seattle, WA, United States, Michael Kipp, University of Washington, Department of Earth & Space Sciences, Seattle, WA, United States and David C Catling, University of Washington, Earth and Space Sciences, Seattle, WA, United States
Diagenetic effect on the carbonate carbon isotope compositions: evidence from the Ediacaran Doushantuo Formation of South China (538419)
Chengguo Guan1, Wei Wang2 and Chuanming Zhou2, (1)State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing, China, (2)CAS Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology, Palaeontology and Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing, China
Re-Visiting the Redox-Sensitive Trace Metal Record of the Neoproterozoic Oxygenation Event (553255)
Erik A Sperling, Stanford University, Department of Geological Sciences, Stanford, CA, United States, Una C. Farrell, Trinity College Dublin, Geology, Dublin, Ireland, Richard Stockey, Stanford University, Geological Sciences, Stanford, United States, Noah Planavsky, Yale University, New Haven, CT, United States and SGP Trace Metal Working Group
