T033:
Shaping Slow- and Ultraslow-Spreading Seafloor with Faults, Magma, and Fluids.





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, Woods Hole Oceanographic Institution, Department of Geology & Geophysics, Woods Hole, MA, 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
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:

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
Tingting Zheng1, Brian E Tucholke2 and Jian Lin1,2, (1)Tongji University, State Key Laboratory of Marine Geology, Shanghai, China, (2)Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, MA, United States
Jean-Arthur L Olive, Lamont -Doherty Earth Observatory, Palisades, NY, United States, Ross E Parnell-Turner, Woods Hole Oceanographic Institution, Department of Geology & Geophysics, Woods Hole, MA, 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
Ross E Parnell-Turner1, Eric L Mittelstaedt2, Mark D Kurz3 and Frieder Klein3, (1)Woods Hole Oceanographic Institution, Department of Geology & Geophysics, Woods Hole, MA, United States, (2)University of Idaho, Department of Geological Sciences, Moscow, ID, United States, (3)WHOI, Woods Hole, MA, United States
Aurore Sibrant, University of Idaho, Moscow, ID, United States, Eric L Mittelstaedt, University of Idaho, Department of Geological Sciences, Moscow, ID, United States and Anne Davaille, CNRS / University Paris-Sud, Laboratoire FAST, Orsay, France
Muriel Andreani1, Pablo García del Real2,3, Isabelle Daniel1,4, Nicky Wright5 and Nicolas Coltice6, (1)University Claude Bernard Lyon 1, Villeurbanne, France, (2)University Lyon 1, Laboratoire de Géologie, Villeurbanne, France, (3)University Lyon 1, Villeurbanne, France, (4)Ecole Normale Supérieure Lyon, Lyon, France, (5)University of Sydney, Sydney, Australia, (6)University Claude Bernard Lyon 1, Lyon, France
Min Xu1, Juan Pablo Canales2, Xu Zhao3 and Wen Yan3, (1)SCSIO South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, (2)Woods Hole Oceanographic Inst, Geology and Geophysics, Woods Hole, MA, United States, (3)South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
Timothy J Craig, University of Leeds, Leeds, LS2, United Kingdom and Ross Parnell-Turner, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Álden Adrião1,2, Marcia Maia1, Christophe Hemond1, Mary-Alix Kaczmarek3, Anne Briais4, Clément Vincent1 and Daniele Brunelli2,5, (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)GET Géosciences Environnement Toulouse, Toulouse, France, (4)CNRS GET Géosciences Environnement Toulouse, Toulouse, France, (5)CNR-ISMAR Institute for Marine Science, Bologna, Italy
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
Ingo Heyde1, Chiara Girolami2, Udo Barckhausen1 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
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
Zhonglan Liu, Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing, China and W Roger Buck, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States
Xihe Yue1,2, Huaiming Li2, Chunhui Tao2, Jianye Ren1, Jianping Zhou2, Jie Chen2, Sheng Chen3 and Yuan Wang2, (1)China University of Geosciences Wuhan, College of Marine Science and Technology, Wuhan, China, (2)Key Laboratory of Submarine Geosciences,Second Institute of Oceanography, State Oceanographic Administration, Hangzhou, China, (3)Hangzhou Dianzi University, The Institute of Mechatronic Engineering, Hangzhou, China
Henry J Dick, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Astri JS Kvassnes, ReStoneAS, Fylingsdalen, Norway, Hajima Kinoshita, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Christopher J MacLeod, Cardiff University, Cardiff, CF24, United Kingdom and PaUL T. Robinson, Chinese Academy of Sciences, Institute of Geology, Beijing, China
Telemaco Tesei, University of Perugia, Perugia, Italy, Christopher William Anthony Harbord, University of Durham, Earth Sciences, Durham, United Kingdom, Nicola Paola, Durham University, Earth Sciences, Durham, United Kingdom, Cristiano Collettini, Sapienza University of Rome, Rome, Italy and Cecilia Viti, Università degli Studi di Siena, Dipartimento di Scienze Fisiche, della Terra e dell’Ambiente, Siena, Italy
Mathilde Cannat1, Pierre Agrinier2, Manon Bickert2, Daniele Brunelli3, Cedric Hamelin4, Aurélien Lecoeuvre2, Solveig Lie Onstad4, Marcia Maia5, Mariacristina Prampolini6, Stéphane Rouméjon7, Alberto Vitale Brovarone8, Simon Besançon2 and El-Madani Assaoui2, (1)Institut de Physique du Globe de Paris, Paris Cedex 05, France, (2)Institut de Physique du Globe de Paris, Paris, France, (3)CNR-ISMAR Institute for Marine Science, Bologna, Italy, (4)University of Bergen, Bergen, Norway, (5)CNRS-Université de Bretagne Occidentale, Laboratoire Géosciences Océan, Institut Universitaire Européen de la Mer, Plouzané, France, (6)CNR Institute for Marine Science, Bologna, Italy, (7)ETH Swiss Federal Institute of Technology Zurich, Institute of Geochemistry and Petrology, Zurich, Switzerland, (8)University Pierre and Marie Curie Paris VI, Paris, France
Bernd Schreckenberger1, Ingo Dressel2, Ingo Heyde1, Udo Barckhausen1, Ralf Freitag1 and Kai Schumann1, (1)BGR Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (2)TH Ingolstadt, Ingolstadt, Germany
Hanchao Jian, Institut de Physique du Globe de Paris, Paris, France and Satish Chandra Singh, Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore
Clément Vincent1, Marcia Maia2, Anne Briais3, Daniele Brunelli4, Marco Ligi5, Álden Adrião1 and Susanna E Sichel6, (1)IUEM Institut Universitaire Européen de la Mer, UMR UBO-CNRS 6538 Géosciences Océan, Plouzané, France, (2)CNRS-Université de Bretagne Occidentale, Laboratoire Géosciences Océan, Institut Universitaire Européen de la Mer, Plouzané, France, (3)CNRS GET Géosciences Environnement Toulouse, Toulouse, France, (4)CNR-ISMAR Institute for Marine Science, Bologna, Italy, (5)Consiglio Nazionale delle Ricerche, Bologna, Italy, (6)LAGEMAR UFF, Niteroi, Brazil
Daniel A Winkler, University of Southern Mississippi, Geology and Geography, Hattiesburg, MS, United States and Jeremy R Deans, Texas Tech University, Lubbock, TX, United States
V. Dorsey Wanless1, Meghan Jones2, Mark D Kurz3, Samuel A Soule3, Daniel J Fornari4, Sylvana Bendana5 and Eric L Mittelstaedt6, (1)Boise State University, Boise, ID, United States, (2)Massachusetts Institute of Technology, Cambridge, MA, United States, (3)WHOI, Woods Hole, MA, United States, (4)Organization Not Listed, Washington, DC, United States, (5)Central Washington University, Ellensburg, WA, United States, (6)University of Idaho, Department of Geological Sciences, Moscow, ID, United States
Hao Lu, University of Memphis, Memphis, TN, United States; Center for Earthquake Research & Information, Memphis, TN, United States, Xiaochuan Tian, Lamont -Doherty Earth Observatory of Columbia University, New York, NY, United States, Eunseo Choi, Center for Earthquake Research and Information, University of Memphis, Memphis, TN, United States and W Roger Buck, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States
Ben Urann, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Henry J Dick, WHOI, Woods Hole, MA, United States and Deborah K Smith, National Science Foundation, Arlington, VA, United States
Mark D Kurz1, Joshua Curtice1, Meghan Jones2, Sandrine Péron3, V. Dorsey Wanless4, Eric L Mittelstaedt5, Samuel A Soule6, Frieder Klein6 and Daniel J. Fornari1, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)Massachusetts Institute of Technology, Cambridge, MA, United States, (3)Institut de Physique du Globe de Paris, Paris, France, (4)Boise State University, Dept. of Geosciences, Boise, ID, United States, (5)University of Idaho, Department of Geological Sciences, Moscow, ID, United States, (6)WHOI, Woods Hole, MA, United States
Sylvana Bendana1, V. Dorsey Wanless1, Mark D Kurz2, Samuel A Soule2, Eric L Mittelstaedt3, Daniel J Fornari4 and Marion L Lytle1, (1)Boise State University, Dept. of Geosciences, Boise, ID, United States, (2)WHOI, Woods Hole, MA, United States, (3)University of Idaho, Department of Geological Sciences, Moscow, ID, United States, (4)WHOI, Geology and Geophysics, Woods Hole, MA, United States
Christophe Hemond, IUEM Institut Universitaire Européen de la Mer, Plouzané, France, Daniele Brunelli, CNR-ISMAR Institute for Marine Science, Bologna, Italy, Marcia Maia, CNRS, Paris Cedex 16, France, Stephen Prigent, IUEM, Brest, France and Susanna E Sichel, LAGEMAR UFF, Niteroi, Brazil
Weifang Yang1, Chunhui Tao2, Huaiming Li2, Jin Liang3 and Shili Liao3, (1)Key Laboratory of Submarine Geosciences,Second Institute of Oceangraphy, State Oceanographic Administration, Hangzhou, China, (2)Key Laboratory of Submarine Geosciences,Second Institute of Oceanography, State Oceanographic Administration, Hangzhou, China, (3)Key Laboratory of Submarine Geosciences, Second Institute of Oceangraphy, State Oceanographic Administration, Hangzhou, China

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