GP43D:
Recent Advances in Environmental and Biogeomagnetism I

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Session ID#: 15748

Session Description:
The ubiquity of iron bearing minerals on Earth and other terrestrial bodies coupled to their acute reactivity to changes in biogeochemical and thermodynamic conditions makes them perfect proxies for and tracers of environmental conditions and change. Advances in instrument sensitivity, multi-disciplinary analyses, and experimental and numerical protocols enable the speciation of magnetic minerals and quantitative estimates of their concentrations and grain sizes. From these data, prevailing conditions in surficial or near-surface environments are being reconstructed, monitored and predicted. The session seeks contributions ranging from the magnetic properties of environmentally significant iron-bearing minerals and their characterization in naturally occurring archives (sediment, rocks, speleothem, ice, bacteria and other biomass), to studies that have led to a better understanding of environmental and anthropogenic change through the Earth’s oceans, lakes, rivers, soils, etc..
Primary Convener:  France Lagroix, Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France
Conveners:  Yongxin Pan, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, Christoph E Geiss, Trinity College, Hartford, CT, United States and John Anthony Tarduno, University of Rochester, Department of Physics and Astronomy, Rochester, NY, United States
Chairs:  Christoph E Geiss, Trinity College, Hartford, CT, United States and Michael Winklhofer, Organization Not Listed, Washington, DC, United States
OSPA Liaison:  France Lagroix, Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France
Index Terms:

1505 Biogenic magnetic minerals [GEOMAGNETISM AND PALEOMAGNETISM]
1512 Environmental magnetism [GEOMAGNETISM AND PALEOMAGNETISM]
1518 Magnetic fabrics and anisotropy [GEOMAGNETISM AND PALEOMAGNETISM]
1540 Rock and mineral magnetism [GEOMAGNETISM AND PALEOMAGNETISM]

Abstracts Submitted to this Session:

Ancient origin of microbial biomineralization and magnetotaxis (197019)
Wei Lin1, Greig A Paterson1, Dennis A Bazylinski2, Rixiang Zhu3, Joseph L Kirschvink4 and Yongxin Pan1, (1)Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, (2)Univ. of Nevada, Las Vegas, Las Vegas, NV, United States, (3)Institute of Geology and Geophysics, Chinese Academy of Sciences, State Key Laboratory of Lithospheric Evolution, Beijing, China, (4)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, United States
The demise of a diverse magnetofossil assemblage across the Eocene-Oligocene Transition in a Northwest Atlantic sediment drift. (Invited) (173484)
Peter C Lippert1, Vicki E Taylor2, Steven M Bohaty2, Courtney Wagner1, Chuang Xuan2 and Paul A Wilson2, (1)University of Utah, Department of Geology and Geophysics, Salt Lake City, UT, United States, (2)University of Southampton, Ocean and Earth Science, Southampton, United Kingdom
Dependence of Bacterial Magnetosome Morphology on Chemical Conditions in Deep-sea Sediments (129702)
Toshitsugu Yamazaki, Atmosphere and Ocean Research Institute University of Tokyo, Tokyo, Japan, Yohey Suzuki, University of Tokyo, Department of Earth and Planetary Science, Tokyo, Japan and Noriko Kawamura, Japan Coast Guard Academy, Hiroshima, Japan
Widespread occurrence of magnetic nanoparticle inclusions in marine sediments and their importance in paleomagnetic and environmental magnetic studies (155440)
Liao Chang1, Andrew P Roberts2, David Heslop3, Jinhua LI4, Akira Hayashida5, Xiang Zhao3 and Qinghua Huang1, (1)Peking University, Beijing, China, (2)Australian National University, Research School of Earth Sciences, Canberra, Australia, (3)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (4)Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, (5)Faculty of Science and Engineering, Doshisha University, Kyotanabe, Japan
Research strategies and quantitative methods in environmental magnetism (Invited) (117921)
Ioan Lascu1, Joy R. Muraszko2, Richard J Harrison2 and Kendra K McLauchlan3, (1)Smithsonian Institution, National Museum of Natural History, Mineral Sciences, Washington, United States, (2)University of Cambridge, Cambridge, United Kingdom, (3)Kansas State University, Department of Geography, Manhattan, KS, United States
Simulation of soil iron oxide production via alteration of ferrihydrite confirms direct formation of maghemite and partially oxidized magnetite—Implication for magnetic enhancement models (150227)
Subir K Banerjee, University of Minnesota Twin Cities, Minneapolis, MN, United States, Jacquelyn Smale, University of Minnesota Twin Cities, Earth Sciences, Minneapolis, MN, United States, Dario Bilardello, University of Minnesota, Institute for Rock Magnetism, Minneapolis, United States, Joshua M Feinberg, University of Minnesota Twin Cities, Institute for Rock Magnetism, Department of Earth & Environmental Sciences, Minneapolis, United States and Jennifer A Soltis, Pacific Northwest National Laboratory, Richland, WA, United States
Environmental magnetic records of the Dali Lake borehole sequence in Inner Mongolia and implications for paleoclimatic variations in the semi-arid East Asia since the last deglaciation (Invited) (118215)
Suzhen Liu1, Chenglong Deng1, Jule Xiao1, Jinhua LI1, Greig A Paterson1, Liao Chang2, Liang Yi1, Huafeng Qin1, Yongxin Pan1 and Rixiang Zhu1, (1)Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, (2)Peking University, School of Earth and Space Sciences, Beijing, China
A Preliminary Rock Magnetic Geothermometer to Evaluate Seismic Heating Signatures: Example from the Japan Trench Subduction Plate-boundary Fault Zone Drilled by IODP Expedition 343 (JFAST) (158235)
Mark J Dekkers, Utrecht University, Paleomagnetic Laboratory, Fort Hoofddijk, Utrecht, Netherlands, Tao Yang, Institute of Geophysics, China Eathquake Administration, Beijing, China and Bo Zhang, Institute of Geophysics, China Earthquake Administration, Beijing, China

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