V43G:
Melt Generation, Transport, and Extraction in the On- and Off-Axis Mid-Ocean Ridge Environment I

Submit an Abstract to this Session



Session ID#: 30478

Session Description:
Observations of volcanic construction, geophysical data analysis, and characterizations of the petrological and geochemical variation of extruded lavas all provide critical insight into melting processes at mid-ocean ridge systems. This session will bring together multi-disciplinary observations and modeling efforts to investigate melt generation and migration in an effort to better understand the formation and evolution of oceanic crust and lithosphere. Topics include, but are not limited to: on-axis magma chamber processes, crustal accretion and volcanism; the development and evolution of off-axis magma bodies; near-axis and flank volcanism; near-axis seamount formation and evolution; volcanism along oceanic transform faults; investigations of ophiolites; and tectonic windows into the melting processes. We encourage insights gained structural/tectonic analyses, volcano morphology, geophysical imaging, petrology, geochemistry, and geodynamic and petrologic models of mantle melting at mid-ocean ridges.
Primary Convener:  Patricia M Gregg, University of Illinois at Urbana-Champaign, Urbana, IL, United States
Conveners:  Michael R Perfit, University of Florida, Department of Geological Sciences, Gainesville, United States, Max Jones, Massachusetts Institute of Technology, Cambridge, MA, United States and V. Dorsey Wanless, Boise State University, Department of Geosciences, Boise, United States
Chairs:  Patricia M Gregg, University of Illinois at Urbana-Champaign, Urbana, IL, United States, Max Jones, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, V. Dorsey Wanless, Boise State University, Department of Geosciences, Boise, United States and Michael R Perfit, University of Florida, Department of Geological Sciences, Gainesville, United States
OSPA Liaison:  Michael R Perfit, University of Florida, Department of Geological Sciences, Gainesville, United States
Index Terms:

1037 Magma genesis and partial melting [GEOCHEMISTRY]
3075 Submarine tectonics and volcanism [MARINE GEOLOGY AND GEOPHYSICS]
3618 Magma chamber processes [MINERALOGY AND PETROLOGY]
8416 Mid-oceanic ridge processes [VOLCANOLOGY]

Abstracts Submitted to this Session:

Volatiles in off-axial mid-ocean ridge basalts and the role of the metasomatized oceanic mantle lithosphere (Invited) (211395)
Kei Shimizu, DTM Carnegie Institution, Washington, DC, United States; Carnegie Institution for Science, Washington, DC, United States and Alberto E Saal, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, United States
Major and trace element modeling of mid-ocean ridge mantle melting from the garnet to the plagioclase stability fields: Generating local and global compositional variability (287024)
Stephanie M Krein, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, Mark D Behn, WHOI, Woods Hole, MA, United States and Timothy L Grove, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, United States
The Debate on the Prospective Interaction between SWIR 46°-52°E and Crozet hotspot: Constrain from the Geochemical Characteristics and Helium isotopes of MORBs from Southwest Indian Ridge (295310)
Xing Yu1, Henry J Dick2, Fengyou Chu3, Xiaohu Li3 and Limei Tang4, (1)Second Inst. of Oceanography, Hangzhou, China, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)Second Institute of Oceanography, SOA, Key Laboratory of Submarine Geosciences, SOA, Hangzhou, China, (4)Second institute of Oceanogarphy, Hangzhou, China
Does Along-Axis Melt-Mush Convection Play a Role in the Crystallization of the Lower Crust at Fast Spreading Mid-Ocean Ridges ? (275085)
Mathilde Cannat, Institut de Physique du Globe de Paris, Paris, France, Fabrice J Fontaine, IPGP, Observatoire Volcanologique du Piton de la Fournaise, Bourg Murat, France and Michel Rabinowicz, University of Toulouse III, Gesocience Environnement Toulouse, Toulouse, France
Crystallization Temperatures of Lower Crustal Gabbros from the Oman Ophiolite and the Persistence of the 'Mush Zone' at Intermediate/Fast Spreading Ridges (256433)
Evidence for refertilization of the Pacific plate: implications for the seismic and geochemical properties of the oceanic lithosphere (235389)
Sebastien Pilet1, Othmar Müntener1, Thibault Duretz1 and György Hetényi2, (1)University of Lausanne, Institute of Earth Sciences, Lausanne, Switzerland, (2)University of Lausanne, Lausanne, Switzerland
A systematic search for the base of the Pacific lithosphere (Invited) (261220)
Saikiran Tharimena, University of Southampton, Southampton, United Kingdom, Catherine Rychert, Woods Hole Oceanographic Institution, Ocean and Earth Science, Woods Hole, MA, United States, Nicholas Harmon, University of Southampton, Ocean and Earth Science, Southampton, United Kingdom and Paul White, University of Southampton, Institute of Sound and Vibration Research, Southampton, United Kingdom

See more of: Volcanology, Geochemistry and Petrology