V34B:
Flood and Hotspot Volcanism, and Relationships to Mass Extinctions and Ocean Biogeochemistry II

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Session ID#: 18506

Session Description:
Flood Basalts are catastrophic, voluminous magmatic events that punctuate Earth History. We invite papers that address a range of questions that contribute to an integrated view of flood basalt magmatism from eruption dynamics to mantle source characteristics. What volcanic processes distinguish flood basalts? How do the erupted products change with time, and what is the character of the feeder systems? What is the duration of magmatism? What is the role of crustal modulation, including the location and size of magma reservoirs? What is the balance between crustal (e.g., assimilation, crystal accumulation) and mantle input, and does this balance change with time? What mantle sources are involved, and what distinguishing characteristics allow these source contributions to be resolved? Studies that document the petrological, geochemical, geochronological, volcanological and geophysical attributes of flood basalts and associated crust and mantle are encouraged, to ultimately assemble a temporal and spatial synthesis of these extraordinary events.
Primary Convener:  Wendy A Bohrson, Central Washington University, Ellensburg, WA, United States
Conveners:  Millard F Coffin, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, Robert A Duncan, Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States and Michael R Rampino, New York University, New York, NY, United States
Chairs:  Millard F Coffin, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, Wendy A Bohrson, Central Washington University, Ellensburg, WA, United States, Michael R Rampino, New York University, New York, NY, United States and Robert A Duncan, Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States
OSPA Liaison:  Wendy A Bohrson, Central Washington University, Ellensburg, WA, United States

Cross-Listed:
  • B - Biogeosciences
  • OS - Ocean Sciences
  • T - Tectonophysics
Index Terms:

3037 Oceanic hotspots and intraplate volcanism [MARINE GEOLOGY AND GEOPHYSICS]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
8137 Hotspots, large igneous provinces, and flood basalt volcanism [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Mercury as a proxy for Large Igneous Province volcanism: A comparison of Mesozoic events (155826)
Lawrence Percival1, Hugh C Jenkyns2, Tamsin A Mather2, Stephen P Hesselbo3, Micha Ruhl4, Leonardo R. Tedeschi5, Jessica Hope Whiteside6, Lineke Woelders7, Fabienne Giraud8, Bernard Pittet9, Danièle Grosheny10, Francois Baudin11 and Stephane Reboulet9, (1)University of Oxford, Oxford, United Kingdom, (2)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, (3)University of Exeter, Exeter, United Kingdom, (4)University of Oxford, Earth Sciences, Oxford, United Kingdom, (5)PETROBRAS, Rio de Janeiro, Brazil, (6)University of Southampton, Southampton, United Kingdom, (7)Katholieke Universiteit Leuven, Leuven, Belgium, (8)ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, (9)LGLTPE Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement, Villeurbanne Cedex, France, (10)Université de Lorraine, Faculté des Sciences et Technologies, Département des Géosciences, Vandoeuvre-lès-Nancy, France, (11)Sorbonne University, ISTeP, Paris, France
Global silica cycle paced by astronomical cycles recorded in the Mesozoic bedded chert: Implications for early Mesozoic extinctions (133571)
Masayuki Ikeda, Shizuoka University, Shizuoka, Japan, Kazumi Ozaki, Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, GA, United States and Ryuji Tada, University of Tokyo, Bunkyo-ku, Japan
Chronology of magmatic and biological events during mass extinctions (130694)
Urs Schaltegger1, Joshua Davies1, Bjoern Baresel1 and Hugo Bucher2, (1)University of Geneva, Earth Sciences, Geneva, Switzerland, (2)University of Zurich, Palaeontology, Zurich, Switzerland
Thermal erosion of cratonic lithosphere as a potential trigger for mass-extinction (118356)
Sebastien Pilet1, Othmar Müntener1, Guex Jean2, Blair Schoene3 and Urs Schaltegger4, (1)University of Lausanne, Institute of Earth Sciences, Lausanne, Switzerland, (2)University of Lausanne, Lausanne, Switzerland, (3)Princeton University, Department of Geosciences, Princeton, NJ, United States, (4)University of Geneva, Earth Sciences, Geneva, Switzerland
Lateral Variability of Lava flow Morphologies in the Deccan Traps Large Igneous Province (India) (183425)
Loÿc Vanderkluysen, Drexel University, Department of Biodiversity, Earth & Environmental Science, Philadelphia, PA, United States, Erika Rader, Drexel University, Philadelphia, PA, United States, Stephen Self, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States, Amanda B Clarke, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, Hetu Sheth, Indian Institute of Technology Bombay, Mumbai, India and Danielle Kimiko Moyer, Drexel University, Department of Biodiversity, Earth and Environmental Science, Philadelphia, PA, United States
A Tale of Two Swarms: Mapping Of Calderas And 40Ar/39Ar Geochronology Of Rhyolite Ignimbrites Delineate Two Distinct Steens Basalt Fissure Systems (198945)
Thomas R Benson, Stanford University, Geological Sciences, Stanford, CA, United States and Gail Ann Mahood, Stanford University, Stanford, CA, United States
Geochemical Evolution of Steens Basalt: Quantification of Mantle vs. Crustal Contributions to an Evolving Flood Basalt Magmatic System (129538)
Sylvana Bendana1, Wendy A Bohrson1, Anita Grunder2 and Nicole E Moore3, (1)Central Washington University, Ellensburg, WA, United States, (2)Oregon State University, CEOAS, Corvallis, OR, United States, (3)Pomona College, Claremont, CA, United States
The Last Gasp – the Terminal Magmatic Stages of the Keweenaw LIP (157861)
Tyrone O Rooney, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States, Eric Brown, Aarhus University, Department of Geoscience, Aarhus, Denmark, Robert Moucha, Syracuse University, Earth Sciences, Syracuse, NY, United States, Carol A Stein, University of Illinois Chicago, Department of Earth & Environmental Sciences, Chicago, United States and Seth Stein, Northwestern University, Evanston, IL, United States

See more of: Volcanology, Geochemistry and Petrology