T023
Understanding the Variability in Accretionary Processes and Hydrothermal Activity at Slow Spreading Ridges I

Thursday, 10 December 2020: 04:00-05:00
Virtual
Primary Convener:  Manon Bickert, Institut de Physique du Globe de Paris, Paris, France
Conveners:  Manon Bickert, Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, Paris, France, Eric L Mittelstaedt, University of Idaho Library, Moscow, ID, United States and Mathilde Cannat, CNRS and Institut de Physique du Globe de Paris, Paris, France
Primary Liaison:  Manon Bickert, Institut de Physique du Globe de Paris, Paris, France
Chairs:  Manon Bickert, Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, Paris, France, Eric L Mittelstaedt, University of Idaho Library, Moscow, ID, United States and Mathilde Cannat, CNRS and Institut de Physique du Globe de Paris, Paris, France
OSPA Liaison:  Mathilde Cannat, CNRS and Institut de Physique du Globe de Paris, Paris, France
04:00
T023-01
Interplay Between Volcanic and Tectonic Axial Processes in a Cold Slow-spreading Ridge: the Mid-Atlantic Ridge South of the Romanche Transform Tault (669072)
Marcia Maia1, Daniele Brunelli2, Cedric Hamelin3, Anne Briais4, Ghislain Barré5, Léa Grenet5 and SMARTIES Cruise scientific team, (1)CNRS, Paris Cedex 16, France, (2)University of Modena and Reggio Emilia, Dipartimento di Scienze Chimiche e Geologiche, Modena, Italy, (3)University of Bergen, Bergen, Norway, (4)Obs Midi-Pyrenees, Toulouse, France, (5)Université de Brest, Laboratoire Géosciences Océan UMR 6538, Plouzané, France
04:04
T023-03
Compaction of crystal mush bodies aids extraction and accumulation of reactive melts throughout the ultraslow-spread oceanic crust at the Atlantis Bank OCC (SWIR): insights from grain-size variations in olivine gabbro. (703891)
Carlotta Ferrando1,2, Lyderic France2, Valentin Basch1, Alessio Sanfilippo1, Benoit Ildefonse3, Riccardo Tribuzio1, Marine Boulanger2 and Fabrice Barou3, (1)University of Pavia, Pavia, Italy, (2)CRPG Centre de Recherches Pétrographiques et Géochimiques, Vandoeuvre-Les-Nancy, France, (3)Géosciences Montpellier, Univ Montpellier, CNRS, Univ Antilles, Montpellier, France
04:08
T023-04
Crustal accretion in a slow-spreading back-arc basin: Insights from the Mado Megamullion oceanic core complex (Shikoku Basin, Philippine Sea) (690245)
Valentin Basch1, Alessio Sanfilippo1, Camilla Sani1, Yasuhiko Ohara2, Jonathan E Snow3, Osamu Ishizuka4, Yumiko Harigane5, Atlanta Sen6, Kyoko Okino7, Masakazu Fujii8, Norikatsu Akizawa9, Katsuyoshi Michibayashi10 and Hiroyuki Yamashita11, (1)University of Pavia, Pavia, Italy, (2)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (3)Louisiana State University, Baton Rouge, LA, United States, (4)Tsukuba, Ibaraki, Japan, (5)Geological Survey of Japan, Tsukuba, Japan, (6)University of Houston, Houston, TX, United States, (7)Univ Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Chiba, Japan, (8)Atmosphere and Ocean Research Institute University of Tokyo, Tokyo, Japan, (9)University of Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Japan, (10)Nagoya University, Nagoya, Japan, (11)Kanagawa Prefectural Museum of Natural History, Odawara, Japan
04:12
T023-05
Three-dimensional fine-scale seismic structure of the Rainbow massif constrained by downward continued multichannel seismic data (708283)
Hanchao Jian, Woods Hole Oceanographic Institution, Geology & Geophysics, Woods Hole, MA, United States, Juan Pablo Canales, Woods Hole Oceanographic Inst, Geology and Geophysics, Woods Hole, MA, United States, Robert A Dunn, Los Angeles, CA, United States and Mladen R Nedimovic, Dahousie University, Halifax, NS, Canada
04:16
T023-06
What's in a "M"? Short-term controls on the magmatic fraction of mid-ocean ridge extension. (Invited) (665004)
Jean-Arthur L Olive, Ecole Normale Supérieure Paris/CNRS, Laboratoire de géologie, Paris, France and Pierre Dublanchet, MINES ParisTech - PSL University, Géophysique, Centre de Géosciences, Paris, France
04:20
T023-07
Magma Chamber Pressure Controls Along Axis Variations in Crustal Thickness, Axial Depth and Axial Relief at Plate Spreading Centers (714346)
Yi Luo, Peking University, School of Earth and Space Sciences, Beijing, China; Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, United States and W Roger Buck, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States
04:24
T023-08
Penrose on a diet: magma-lite crustal accretion at Masirah, a slow-spread, ‘true’ MOR-ophiolite in southeast Oman (723878)
Max Jansen1, Christopher J MacLeod2, C. Johan Lissenberg2, Ian John Parkinson3 and Antony Morris4, (1)Cardiff University, School of Earth & Ocean Sciences, Cardiff, CF24, United Kingdom, (2)Cardiff University, School of Earth & Ocean Sciences, Cardiff, United Kingdom, (3)University of Bristol, Department of Earth Sciences, Bristol, United Kingdom, (4)Plymouth University, School of Geography, Earth and Environmental Sciences, Plymouth, United Kingdom
04:28
Discussion
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