T33D:
Shaping Slow- and Ultraslow-Spreading Seafloor with Faults, Magma, and Fluids Posters

Submit an Abstract to this Session



Session ID#: 23613

Session Description:
Crustal accretion at slow- and ultraslow-spreading ridges is fundamentally different from that at faster spreading ridges, and accounts for vast areas of the Atlantic, Indian and Arctic Oceans. Plate separation in these settings is accommodated by a combination of magmatic and tectonic extension, leading to deformation often dominated by large-offset detachment faults. The resulting seafloor has a diverse range of morphologies including corrugated domes, non-corrugated massifs, back-tilted fault breakaways, and broad smooth hills. Despite recent advances in seafloor observations and modeling techniques, the mechanics of this mode of seafloor spreading remain controversial. We welcome contributions from a broad range of approaches, including geophysical and geological observations, geodynamic modeling, fluid chemistry, seismology, experimental rock mechanics and petrology.
Primary Convener:  Ross E Parnell-Turner, Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States
Conveners:  Jean-Arthur L Olive, Lamont -Doherty Earth Observatory, Palisades, NY, United States and Muriel Andreani, University Claude Bernard Lyon 1, Villeurbanne, France
Chairs:  Jean-Arthur L Olive, WHOI, Woods Hole, United States, Muriel Andreani, University Claude Bernard Lyon 1, Villeurbanne, France and Ross E Parnell-Turner, Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States
OSPA Liaison:  Ross E Parnell-Turner, Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States
Co-Organized with:
Tectonophysics, and Volcanology, Geochemistry and Petrology

Cross-Listed:
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

3017 Hydrothermal systems [MARINE GEOLOGY AND GEOPHYSICS]
3035 Midocean ridge processes [MARINE GEOLOGY AND GEOPHYSICS]
8163 Rheology and friction of fault zones [TECTONOPHYSICS]
8178 Tectonics and magmatism [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Controls on mid-ocean ridge segmentation and transform fault formation from laboratory experiments using fluids of complex rheology. (238888)
Aurore Sibrant1, Eric L Mittelstaedt1 and Anne Davaille2, (1)University of Idaho, Moscow, ID, United States, (2)CNRS / University Paris-Sud, Laboratoire FAST, Orsay, France
Combined effects of along-axis and temporal variations in diking rates on faulting styles at slow spreading ridges (275950)
Hao Lu, University of Memphis, Memphis, TN, United States; Center for Earthquake Research & Information, Memphis, TN, United States, Dr. Xiaochuan Tian, PhD, Lamont -Doherty Earth Observatory of Columbia University, New York, NY, United States, Eunseo Choi, PhD, University of Memphis, Center for Earthquake Research and Information, Memphis, TN, United States and W Roger Buck, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States
Controls on the Seafloor Exposure of Detachment Fault Surfaces (233659)
Jean-Arthur L Olive, Lamont -Doherty Earth Observatory, Palisades, NY, United States, Ross E Parnell-Turner, Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States, Javier Escartin, Institut de Physique du Globe, Paris, France, Deborah K Smith, WHOI, Woods Hole, MA, United States and Sven Petersen, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Final Act of an Oceanic Detachment Fault Revealed by Submersible Dives at 13°48’N on the Mid-Atlantic Ridge (234635)
Ross E Parnell-Turner, Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States, Eric L Mittelstaedt, University of Idaho, Moscow, ID, United States, Mark D Kurz, WHOI, Department of Marine Chemistry & Geochemistry, Woods Hole, United States and Frieder Klein, WHOI, Woods Hole, MA, United States
3D Modeling and Inversion of Deep Tow Magnetic Data from Hydrothermal Fields at the Central and Southeast Indian Ridges (270367)
Bernd Schreckenberger1, Ingo Dressel2, Ingo Heyde1, Udo Barckhausen3, Ralf Freitag1 and Kai Schumann1, (1)BGR Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (2)TH Ingolstadt, Ingolstadt, Germany, (3)BGR Federal Institute for Geosciences and Natural Resources, Hanover, Germany
Evolution of spreading rate and H2 production by serpentinization at mid-ocean ridges from 200 Ma to Present (239632)
Muriel Andreani, University Claude Bernard Lyon 1, Villeurbanne, France, Pablo García del Real, University Lyon 1, Laboratoire de Géologie, Villeurbanne, France; University Lyon 1, Villeurbanne, France, Isabelle Daniel, Ecole Normale Supérieure Lyon, Lyon, France; Université Claude Bernard Lyon 1, Laboratoire de Géologie de Lyon, Villeurbanne, France, Nicky Wright, The University of Sydney, EarthByte Group, School of Geosciences, Sydney, NSW, Australia and Nicolas Coltice, University Claude Bernard Lyon 1, Lyon, France
New Noble Gas Studies on Popping Rocks from the Mid-Atlantic Ridge near 14°N (285890)
Mark D Kurz1, Joshua Curtice2, Max Jones3, Sandrine Peron4, V Dorsey Wanless5, Eric L Mittelstaedt6, Adam A Soule7, Frieder Klein8 and Daniel J. Fornari2, (1)Woods Hole Oceanographic Institution, Department of Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)Massachusetts Institute of Technology, Cambridge, MA, United States, (4)Institut de Physique du Globe de Paris, Paris, France, (5)Boise State University, Department of Geosciences, Boise, United States, (6)University of Idaho, Moscow, ID, United States, (7)WHOI, Narragansett, United States, (8)WHOI, Woods Hole, MA, United States
Petrologic Evolution of Lavas Erupted between 13N and 14N, Mid-Atlantic Ridge (289862)
Sylvana Bendana1, V Dorsey Wanless2, Mark D Kurz3, Adam A Soule4, Eric L Mittelstaedt5, Daniel J Fornari6 and Marion L Lytle1, (1)Boise State University, Dept. of Geosciences, Boise, ID, United States, (2)Boise State University, Department of Geosciences, Boise, United States, (3)WHOI, Department of Marine Chemistry & Geochemistry, Woods Hole, United States, (4)WHOI, Narragansett, United States, (5)University of Idaho, Moscow, ID, United States, (6)WHOI, Geology and Geophysics, Woods Hole, MA, United States
St Paul fracture zone intratransform ridge basalts (Equatorial Atlantic): Insight within the mantle source diversity (292118)
Christophe Hemond, IUEM Institut Universitaire Européen de la Mer, Plouzané, France, Daniele Brunelli, Woods Hole Oceanographic Institution, Woods Hole, United States, Marcia Maia, CNRS, Paris Cedex 16, France, Stephen Prigent, IUEM, Brest, France and Susanna E Sichel, LAGEMAR UFF, Niteroi, Brazil
MECHANICAL MIXING AND METAMORPHISM OF MAFIC AND ULTRAMAFIC LITHOLOGIES DURING MYLONISIS AT THE ST. PAUL TRANSFORM SYSTEM, MID-ATLANTIC RIDGE (252439)
Álden Adrião1,2, Marcia Maia1, Christophe Hemond3, Mary-Alix Kaczmarek4, Anne Briais5, Clément Vincent1 and Daniele Brunelli2,6, (1)IUEM Institut Universitaire Européen de la Mer, UMR UBO-CNRS 6538 Géosciences Océan, Plouzané, France, (2)University of Modena and Reggio Emilia, Dipartimento di Scienze Chimiche e Geologiche, Modena, Italy, (3)Geo-Ocean UMR6538, CNRS-Ifremer-UBO-UBS, Plouzané, France, (4)GET Géosciences Environnement Toulouse, Toulouse, France, (5)CNRS GET Géosciences Environnement Toulouse, Toulouse, France, (6)Woods Hole Oceanographic Institution, Woods Hole, United States
Geophysical Evidence for Magma Intrusion across the Non-Transform Offset between the Famous and North Famous segments of The Mid-Atlantic Ridge (210726)
Marion Giusti1, Robert P Dziak2, Marcia Maia1, Julie Perrot1 and Alexey Sukhovich3, (1)CNRS-Université de Bretagne Occidentale, Laboratoire Géosciences Océan, Institut Universitaire Européen de la Mer, Plouzané, France, (2)NOAA, Pacific Marine Environmental Laboratory, Newport, OR, United States, (3)CNRS-Université de Bretagne Occidentale, Laboratoire Géosciences Océan, Institut Universitaire Européen de la Mer, Plouzane, France
Structure, Geochemistry, and Kinematics at the Slow-Spreading 16°30’N Region of the Mid-Atlantic Ridge (281104)
Benjamin Urann, Woods Hole Oceanographic Institution, Geology & Geophysics Department, Woods Hole, United States, Henry J Dick, WHOI, Woods Hole, MA, United States and Deborah K Smith, National Science Foundation, Arlington, VA, United States
Long-term evolution of a propagating non-transform offset on the Mid-Atlantic Ridge over the last 26 m.y. (220342)
Tingting Zheng1, Brian E Tucholke2 and Jian Lin2,3, (1)State Key Laboratory of Marine Geology, School of Ocean and Earth Science, Tongji University, Shanghai, China, (2)Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, MA, United States, (3)Tongji University, State Key Laboratory of Marine Geology, Shanghai, China
3D Gravimetric Modeling of the Spreading System North and Southeast of the Rodriguez Triple Junction (Indian Ocean) (254935)
Ingo Heyde1, Chiara Girolami2, Udo Barckhausen3 and Ralf Freitag1, (1)BGR Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (2)University of Perugia, Department of Physics and Geology, Perugia, Italy, (3)BGR Federal Institute for Geosciences and Natural Resources, Hanover, Germany
A Method for Quantitative Assessing the Migration-Distance of Active Faults on Both Sides of Mid-Ocean Ridges——Based on Multi-Beam Bathymetry Data (254609)
Fan Qingkai1,2, Li Jianghai1,2 and Liu Chiheng1,2, (1)Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of earth and space sciences, Peking University, Beijing, China, (2)Institute of Oil and Gas, Peking University, Beijing, China
Detailed seismic velocity structure of the ultra-slow spread crust at the Mid-Cayman Spreading Center from travel-time tomography and synthetic seismograms (260324)
Jennifer Harding, University of Texas at Austin, Austin, TX, United States, Harm J Van Avendonk, Univ of Tx-Austin-Geosciences, Austin, TX, United States, Nicholas W Hayman, Institute for Geophysics, Austin, TX, United States, Ingo Grevemeyer, GEOMAR, Kiel, Germany and Christine Peirce, University of Durham, Durham, United Kingdom
Seismic Velocity Variation and Evolution of the Upper Oceanic Crust across the Mid-Atlantic Ridge at 1.3°S (271808)
Hanchao Jian, Institut de Physique du Globe de Paris, Paris, France and Satish Chandra Singh, Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore

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