OS23F:
New Advances in Understanding Mid-Ocean Ridge Processes from Ocean Drilling and Ophiolites I

Submit an Abstract to this Session Please know the abstract submission deadline has passed. There are no exceptions to this deadline and no new abstracts can be submitted.
You can still search the program to see your colleague�s abstract submissions as well as the sessions submitted for the 2016 Fall Meeting. The final program will be released in early October.


Session ID#: 15092

Session Description:
This session will consider recent progress in understanding and quantifying the processes that govern oceanic crust accretion and evolution of the oceanic lithosphere. Oceanic crust is formed from percolating mantle melts through complex processes involving melt-rock reactions, melt crystallization, syn- to post-magmatic deformation, and interactions during hydrothermal circulation. Hydrothermal systems are major heat exchangers that cool the crust and provide niches for microbial activity in the subsurface. Our understanding of these complex systems requires having an integrated view of the various processes that affect the lithosphere from the mantle to the shallow subsurface. In this view, we encourage contributions related to igneous accretion, deformation, hydrothermal circulation, and to the development of microbial life in these extreme environments, as well as more general approaches related to the architecture and to the geodynamic evolution of mid-ocean ridges. Results related to recent ocean drilling (IODP) expeditions are particularly welcomed.
Primary Convener:  Lyderic France, CRPG Centre de Recherches Pétrographiques et Géochimiques, Vandoeuvre-Les-Nancy, France
Conveners:  Beth Orcutt, Bigelow Laboratory for Ocean Sciences, East Boothbay, United States and Michael J Cheadle, University of Wyoming, Geology & Geophysics, Laramie, United States
Chairs:  Beth Orcutt, Bigelow Laboratory for Ocean Sciences, East Boothbay, United States and Barbara E John, University of Wyoming, Geology & Geophysics, Laramie, United States
OSPA Liaison:  Beth Orcutt, Bigelow Laboratory for Ocean Sciences, East Boothbay, United States
Co-Organized with:
Volcanology, Geochemistry and Petrology, Volcanology, Geochemistry and Petrology, Tectonophysics, and Biogeosciences

Cross-Listed:
  • B - Biogeosciences
  • GP - Geomagnetism, Paleomagnetism and Electromagnetism
  • T - Tectonophysics
  • V - Volcanology, Geochemistry and Petrology

Proposed Co-Organized Session with:
  • B - Biogeosciences
  • T - Tectonophysics
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

0450 Hydrothermal systems [BIOGEOSCIENCES]
1021 Composition of the oceanic crust [GEOCHEMISTRY]
3618 Magma chamber processes [MINERALOGY AND PETROLOGY]
3621 Mantle processes [MINERALOGY AND PETROLOGY]

Abstracts Submitted to this Session:

The Nature of the Intrusive Crust and Moho at Slower Spreading Ridges: SloMo Leg 1 (IODP Expedition 360) (Invited) (125395)
Christopher J MacLeod, Cardiff University, Cardiff, CF24, United Kingdom, Henry J Dick, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Peter Blum, Texas A & M University College Station, College Station, TX, United States and IODP Expedition 360 Scientists, Texas A&M University, College Station, TX, United States
Lateral Variability of the Lower Ocean Crust at Atlantis Bank, SW Indian Ridge, Results of IODP Expedition 360 (163398)
Henry J Dick, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Christopher J MacLeod, Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom, Peter Blum, Texas A&M University, International Ocean Discovery Program, College Station, United States and Expedition 360 Scientific Party, Texas A&M University, International Ocean Discovery Program, College Station, TX, United States
Insights into oceanic core complex formation from structural studies of IODP Hole U1473A, Expedition 360 Atlantis Bank, Southwest Indian Ridge (158469)
Jeremy R Deans, University of Southern Mississippi, Department of Geography and Geology, Stennis Space Center, TX, United States, Michael J Cheadle, University of Wyoming, Geology & Geophysics, Laramie, United States, Carlotta Ferrando, Géosciences Montpellier, Montpellier Cedex 05, France, Oliver Plümper, Utrecht University, Department of Earth Sciences, Utrecht, Netherlands, Gustavo Viegas, Plymouth University, School of Geography, Earth and Environmental Sciences, Plymouth, United Kingdom and IODP Expedition 360 Scientists, Texas A&M University, College Station, TX, United States
Detachment Faulting, Serpentinization, Fluids and Life: Preliminary Results of IODP Expedition 357 (Atlantis Massif, MAR 30°N) (133139)
Gretchen L. Frueh-Green, ETH Zurich, Department of Earth Sciences, Zurich, Switzerland, Beth Orcutt, Bigelow Laboratory for Ocean Sciences, East Boothbay, United States, Sophie Green, MAREMAP, ECORD Science Operator, British Geological Survey, Edingburgh, United Kingdom, Carol Cotterill, ECORD Science Operator, British Geological Survey, Edinburgh, United Kingdom and IODP Expedition 357 Science Party
Deformation Processes and the Sequence of Deformation, Alteration and Intrusion Events on an Oceanic Detachment Fault: IODP Expedition 357, Atlantis Massif, Mid-Atlantic Ridge (158702)
Andrew M McCaig, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, Mathilde Cannat, Institut de Physique du Globe de Paris, Paris, France, Javier Escartin, Institut de Physique du Globe, Paris, France and Barbara E John, University of Wyoming, Geology & Geophysics, Laramie, United States
Microbiology of the lower ocean crust - Preliminary results from IODP Expedition 360, Atlantis Bank (178230)
Jason B Sylvan, Texas A&M University College Station, College Station, TX, United States, Virginia P Edgcomb, Woods Hole Oceanographic Institution, Geology and Geophysics Department, Woods Hole, United States, Gaetan Burgaud, University of Brest, LUBEM (Laboratory of Biodiversity and Microbial Ecology), Plouzané, France, Frieder Klein, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, United States, Florence Schubotz, MARUM - University of Bremen, Bremen, Germany and IODP Expedition 360 Scientists, Texas A&M University, College Station, TX, United States
Normal Faulting, Fluid Upflow Pathways, and Alteration in the Subsurface of a Seafloor Ultramafic-Hosted Hydrothermal System, northern Apennines, Italy (163940)
Jeffrey Alt1, David Levine1, Laura Crispini2, Laura Gaggero3, Wayne C Shanks III4 and Cayce Gulbransen5, (1)University of Michigan Ann Arbor, Earth & Environmental Sciences, Ann Arbor, MI, United States, (2)University of Genova, Department of Earth Sciences, Environment and Life, Genova, Italy, (3)University of Genoa, Dipartimento di Scienza della Terra dell’Ambiente e della Vita, Genoa, Italy, (4)U.S. Geological Survey, Yellowstone Volcano Observatory, Boulder, CO, United States, (5)U.S. Geological Survey, Denver, CO, United States

See more of: Volcanology, Geochemistry and Petrology