V31B:
Crustal Accretion Processes at Intermediate to Fast-Spreading Ridges: New Advances from Seafloor Geology, Geophysical Experiments, and Ocean Drilling III Posters

Wednesday, 17 December 2014: 8:00 AM-12:20 PM
Chairs:  Suzanne M Carbotte, Lamont-Doherty Earth Obs, Palisades, NY, United States and Kathryn M Gillis, Univ Victoria, Victoria, BC, Canada
Primary Conveners:  Kathryn M Gillis, Univ Victoria, Victoria, BC, Canada
Co-conveners:  Suzanne M Carbotte, Lamont-Doherty Earth Obs, Palisades, NY, United States, Benoit Ildefonse, CNRS, Montpellier, France and Michael R Perfit, Univ of Florida, Gainesville, FL, United States
OSPA Liaisons:  Kathryn M Gillis, Univ Victoria, Victoria, BC, Canada

Abstracts Submitted to this Session:

4725
 
Petrography and Geochemistry of High Silica EPR Glasses: Implications for Melt Production and Transport
Alisa Kotash and John F Bender, University of North Carolina at Charlotte, Charlotte, NC, United States
4726
 
Rapid hydrothermal cooling above the axial melt lens at fast-spreading mid-ocean ridge: Quantification through intra-plagioclase diffusion revealed by IODP Hole 1256D
Chao Zhang, Juergen Koepke, Clemens Kirchner, Niko Götze and Harald Behrens, Leibniz University of Hannover, Institut für Mineralogie, Hannover, Germany
4727
 
Oman Ophiolite: Petrological and Geochemical Investigation of Fast-Spreading Crust Formation Processes
Tim Müller1, Juergen Koepke1, C-Dieter Garbe-Schoenberg2, Stephan Schuth1 and Paul Eric Wolff1, (1)Leibniz University of Hannover, Hannover, Germany, (2)University of Kiel, Kiel, Germany
4728
 
Trace element systematics in the plutonic section of fast-spread oceanic crust – evidence from the Wadi Gideah reference profile (Wadi Tayin Massif, Oman ophiolite)
C-Dieter Garbe-Schoenberg1, Juergen Koepke2, Tim Mueller2, Paul Eric Wolff2 and Harald Strauss3, (1)University of Kiel, Institute of Geosciences, Kiel, Germany, (2)Leibniz University of Hannover, Institut für Mineralogie, Hannover, Germany, (3)Universitaet Muenster, Geologisch-Palaeontologisches Institut, Muenster, Germany
4729
 
Insights into Oceanic Crust Accretion from a Comparison of Rock Magnetic and Silicate Fabrics from Lower Crustal Gabbros from Hess Deep Rift
Andrew J Horst, Oberlin College, Oberlin, OH, United States, Antony Morris, Plymouth University, Plymouth, United Kingdom, Sarah A Friedman, Southern Illinois University Carbondale, Department of Geology, Carbondale, IL, United States and Michael J Cheadle, University of Wyoming, Laramie, WY, United States
4730
 
Towards Solving the Conundrum of Fast-Spread Ocean Crust Formation: Insights from Textural Analysis of Gabbroic Rocks from Pito Deep and Hess Deep, East Pacific Rise
Tyler C Brown1, Michael J Cheadle1, Barbara E John1, Laurence A Coogan2, Jeffrey S Gee3, Jeffrey Alan Karson4, Romain Meyer5, Georges Ceuleneer6 and Susan Swapp1, (1)University of Wyoming, Laramie, WY, United States, (2)University of Victoria, Victoria, BC, Canada, (3)Univ California San Diego, La Jolla, CA, United States, (4)Syracuse University, Syracuse, NY, United States, (5)Centre for Gebiology, Bergen, Norway, (6)University Paul Sabatier Toulouse III, Toulouse Cedex 09, France
4731
 
Crystallographic Preferred Orientations and Seismic Properties of troctolitic rocks from fast-spread lower ocean crust (IODP Expedition 345 at Hess Deep
Benoit Ildefonse1, Norikatsu Akizawa2, David Mainprice1, Marguerite Godard1 and Shoji Arai2, (1)Université Montpellier 2 & CNRS, Géosciences Montpellier, Montpellier, France, (2)Kanazawa University, Department of Earth Sciences, Kanazawa, Japan
4732
 
Geochemical characteristics of fast-spreading lower oceanic crust: an example of troctolites at the Hess Deep Rift (IODP Expedition 345)
Norikatsu Akizawa1, Marguerite Godard2, Benoit Ildefonse2 and Shoji Arai1, (1)Kanazawa University, Department of Earth Sciences, Kanazawa, Japan, (2)Université Montpellier 2 & CNRS, Géosciences Montpellier, Montpellier, France
4733
 
The Paradox of the Axial Melt Lens: Petrology and Geochemistry of the Upper Plutonics at Hess Deep
C. Johan Lissenberg1, Matthew Phillip Loocke1 and Christopher J MacLeod2, (1)Cardiff University, School of Earth & Ocean Sciences, Cardiff, United Kingdom, (2)Cardiff University, School of Earth & Ocean Sciences, Cardiff, CF24, United Kingdom
4734
 
Pb–isotopic Features of Primitive Rocks from Hess Deep: Distinguishing between EPR and Cocos–Nazca Mantle Source(s)
Marlon M Jean, Luh Institut Fuer Geologie, Hannover, Germany, Trevor Falloon, University of Tasmania, Hobart, Australia and Kathryn M Gillis, University of Victoria, Victoria, BC, Canada
4735
 
Protracted construction of fast-spread gabbroic crust: Constraints from SHRIMP Pb/U dates and chemical analysis of zircon from Hess Deep
Barbara E John and Rose Pettiette, University of Wyoming, Laramie, WY, United States
4736
 
Hydrothermal Spinel, Corundum and Diaspore in Gabbroic Rocks from the Hess Deep Rift, IODP Site U1415
Toshio Nozaka, Okayama University, Okayama, Japan, Romain Meyer, Centre for Gebiology, Bergen, Norway and Robert P Wintsch, Indiana Univ, Bloomington, IN, United States
4737
 
Modeling Crustal-Scale Hydrothermal Flows through a Seamount Network
Rachel M Lauer, Andrew T Fisher and Dustin M Winslow, UC Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States
4738
 
Refining the Subseafloor Circulation Model of the Middle Valley Hydrothermal System Using Fluid Geochemistry
Katherine E Inderbitzen, University of Alaska School of Fisheries & Ocean Science, Marina, CA, United States, Charles Geoffrey Wheat, NURP/ Univ Alaska, Moss Landing, CA, United States, Paul A Baker, Duke University, Durham, NC, United States and Andrew T Fisher, UC Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States
4739
 
Variability of low temperature hydrothermal alteration in upper ocean crust: Juan de Fuca Ridge and North Pond, Mid-Atlantic Ridge
Jennifer Rutter1, Michelle Harris1, Rosalind Mary Coggon2, Jeffrey Alt3 and Damon A H Teagle1, (1)University of Southampton, Southampton, SO14, United Kingdom, (2)University of Southampton, Southampton, United Kingdom, (3)Michigan Tech University, Ann Arbor, MI, United States
4740
 
Laser ablation MC-ICP-MS U/Pb geochronology of ocean basement calcium carbonate veins
Michelle Harris1, Rosalind Mary Coggon2, Damon A H Teagle1, Nick M W Roberts3 and Randall Richardson Parrish4, (1)University of Southampton, Southampton, SO14, United Kingdom, (2)University of Southampton, Southampton, United Kingdom, (3)NERC Isotope Geosciences Laboratory, Keyworth, NG12, United Kingdom, (4)NERC Isotope Geosciences Laboratory, Keyworth, United Kingdom
4741
 
Hydrothermal Chimney Distribution from AUV Sentry bathymetry and Alvin at the Galapagos Spreading Center
Avery Jonathan Lee and Scott M White, University of South Carolina Columbia, Columbia, SC, United States
4742
 
Constructional Talus: Formed during Eruption, Not By Later Tectonism
Jennifer Brophy Paduan, David A Clague and David W Caress, Monterey Bay Aquarium Res Inst, Moss Landing, CA, United States
4743
 
Lava Cones and Shields on Intermediate-Rate Mid-Ocean Ridges
David A Clague, Jennifer Brophy Paduan and David W Caress, Monterey Bay Aquarium Res Inst, Moss Landing, CA, United States
4744
 
Magma Dynamics at Axial Seamount, Juan de Fuca Ridge, from Seafloor Deformation Data
Elisa Baumgardt, University of North Carolina at Wilmington, Wilmington, NC, United States, Scott L Nooner, UNC Wilmington, Dept of Geography and Geology, Wilmington, NC, United States and William Chadwick, Oregon State University, Corvallis, OR, United States
4745
 
Length Scales of Magmatic Segments at Intermediate and Fast Spreading Ridges
Bridgit Boulahanis, Columbia University of New York, Palisades, NY, United States, Suzanne M Carbotte, Lamont-Doherty Earth Obs, Palisades, NY, United States, Emily M Klein, Duke University, Earth and Ocean Sciences, Durham, NC, United States, Deborah K Smith, Woods Hole Oceanographic Inst, Arlington, VA, United States and Mathilde Cannat, Institut de Physique du Globe de Paris, Paris, France
4746
 
The Complex History of Alarcon Rise Mid-Ocean Ridge Rhyolite Revealed through Mineral Chemistry
Brian M Dreyer, University of California Santa Cruz, Santa Cruz, CA, United States, Ryan A Portner, Brown University, Providence, RI, United States, David A Clague, Monterey Bay Aquarium Res Inst, Moss Landing, CA, United States, Nathan R Daczko, Macquarie University, GEMOC and CCFS, Department of Earth and Planetary Sciences, Sydney, Australia, Paterno Castillo, University of California San Diego, La Jolla, CA, United States and Ilya N Bindeman, Univ of Oregon, Eugene, OR, United States
4747
 
Geochemistry and petrology of andesites from the north rift zone of Axial Seamount, Juan de Fuca Ridge
Iliya N Smithka1, Michael R Perfit1, David A Clague2 and V. Dorsey Wanless3, (1)University of Florida, Department of Geological Sciences, Ft Walton Beach, FL, United States, (2)Monterey Bay Aquarium Research Institute, Watsonville, CA, United States, (3)Boise State University, Dept. of Geosciences, Boise, ID, United States
4748
 
Melt-rock interaction at the Moho: Evidence from crystal cargo in lavas from near-ridge seamounts
Jason P Coumans1, John Stix1, David A Clague2 and William G Minarik1, (1)McGill University, Montreal, QC, Canada, (2)Monterey Bay Aquarium Research Institute, Watsonville, CA, United States
4749
 
Compressional and Shear Wave Structure of the Upper Crust Beneath the Endeavour Segment, Juan De Fuca Ridge
Eunyoung Kim1, Douglas R Toomey2, Emilie E E Hooft2, William S D Wilcock3, Robert T Weekly4, Sang-Mook Lee1 and Younghee Kim1, (1)Seoul National University, Seoul, South Korea, (2)University of Oregon, Eugene, OR, United States, (3)University of Washington Seattle Campus, Seattle, WA, United States, (4)Incorporated Research Institutions for Seismology, Seattle, WA, United States
4750
 
Crustal Thickness and Lower Crustal Velocity Structure Beneath the Endeavour Segment of the Juan de Fuca Ridge
Ryley Hill1, Dax Christian Soule2, William S D Wilcock3, Douglas R Toomey4, Emilie E E Hooft4 and Robert T Weekly5, (1)University of Nevada Reno, Reno, NV, United States, (2)University of Washington, Seattle, WA, United States, (3)University of Washington Seattle Campus, Seattle, WA, United States, (4)University of Oregon, Eugene, OR, United States, (5)Incorporated Research Institutions for Seismology, Data Management Center, Seattle, WA, United States
4751
 
Advanced Seismic Studies of the Endeavour Ridge: Understanding the Interplay among Magmatic, Hydrothermal, and Tectonic Processes at Mid-Ocean Ridges
Gillean M Arnoux1, Brandon Paul VanderBeek1, Joanna V Morgan2, Emilie E E Hooft1, Douglas R Toomey1, William S D Wilcock3 and Michael Warner4, (1)University of Oregon, Eugene, OR, United States, (2)Imperial College London, London, SW7, United Kingdom, (3)University of Washington Seattle Campus, Seattle, WA, United States, (4)Imperial College London, London, United Kingdom
4752
 
Imaging of Lower-crustal Magma Chambers at an Ultraslow Spreading Ridge Segment using Elastic Waveform Inversion of a Sparse OBS Dataset
Hanchao Jian1,2, Satish Chandra Singh2, Yongshun John Chen1 and Jiabiao Li3, (1)Institute of Theoretical and Applied Geophysics, School of Earth and Space Science, Peking University, Beijing, China, (2)Institut de Physique du Globe de Paris, Paris, France, (3)Second Institute of Oceanograp, Hangzhou, China
4753
 
Seismicity Of The Charlie-Gibbs Fracture Zone
Christopher G Novitsky, University of Minnesota Twin Cities, Minneapolis, MN, United States and Einarsson Páll, University of Iceland, Reykjavik, Iceland
4754
 
The Easternmost Southwest Indian Ridge: A Laboratory to Study MORB and Oceanic Gabbro Petrogenesis in a Very Low Melt Supply Context
Marine Paquet1, Mathilde Cannat1, Cedric Hamelin2 and Daniele Brunelli3, (1)Institut de Physique du Globe de Paris, Paris, France, (2)University of Bergen, Bergen, Norway, (3)University of Modena and Reggio Emilia, Modena, Italy
4755
 
Mineral chemistry of the chromian spinels and chromitites in mafic and ultramafic rocks sampled from oceanic floor
Natsue Abe, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan; Kanazawa University, Departement of Earth Sciences, Kanazawa, Japan
4756
 
Mantle-crust differentiation of chalcophile elements in the oceanic lithosphere
Jakub Ciążela1, Henry J Dick2, Juergen Koepke1, Thomas Kuhn3, Andrzej Muszynski4 and Marta Kubiak5, (1)Leibniz University of Hannover, Institut für Mineralogie, Hannover, Germany, (2)WHOI, Woods Hole, MA, United States, (3)Bundesanstalt fuer Geowissenschaften und Rohstoffe, Hannover, Germany, (4)Adam Mickiewicz University, Poznań, Poland, (5)Polish Academy of Sciences, Warsaw, Poland
4757
 
Infiltration of Refractory Melts into the Sub-Oceanic Mantle: Evidence from Major and Minor Element Compositions of Minerals from the 53° E Amagmatic Segment Abyssal Peridotites at the Southwest Indian Ridge
Changgui Gao1,2, Henry J Dick2, Huaiyang Zhou3, Yang Liu1 and Jixin Wang1, (1)Tongji University, Shanghai, China, (2)WHOI, Woods Hole, MA, United States, (3)Tongji University, State Key Laboratory of Marine Geology, Shanghai, China
 
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