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AGU Chapman Conference on Detachments in Oceanic Lithosphere: Deformation, Magmatism, Fluid Flow, and Ecosystems

Agros, Cyprus
8–16 May 2010

Conference Objectives

Oceanic core complexes (OCCs) are deep sections of the oceanic lithosphere exhumed to the seafloor by long-lived detachment faults formed along the flanks of ultra-slow to intermediate-spreading mid-ocean ridges. These structures have attracted interest because: (1) provide windows into the oceanic lithosphere, (2) are an important component of lithospheric accretion along ridges, (3) host a large variety of high- and low-temperature hydrothermal fields and associated ecosystems, (4) represent an extreme case of strain localization and tectonic deformation, and (5) may provide insights into the origin and nature of continental metamorphic core complexes and detachment faulting in extensional continental margins. The goals of the conference are:

This will require the community to address the following science questions:

  1. How and under which conditions does detachment-faulting lead to the formation and development of OCCs? What are the mechanisms and conditions that promote and sustain strain localization over long periods of time, and the development of an OCC?
  2. What is the lithological structure of OCCs and its variability at scales of meters to tens of kilometers? What is the link between deformation and magmatic emplacement?
  3. What drives hydrothermal circulation in OCCs and detachment faults? What are the feedbacks between fluid circulation, deformation, and magmatic processes?
  4. What is the biodiversity and characteristics of ecosystems associated with OCCs, and how are they related to the style of hydrothermal circulation within OCCs and along detachment faults?
  5. What are the similarities and differences between oceanic and continental detachment faulting (including extensional margins)? How can current knowledge on continental core complex formation, continental breakup and initiation of seafloor spreading inform and contribute to advance research on OCCs?

Conveners

Juan Pablo Canales, Woods Hole Oceanographic Institution, Massachusetts (USA), jpcanales@whoi.edu
Javier Escartín, Centre National de la Recherche Scientifique (CNRS), IPGP, Paris (France), escartin@ipgp.fr

Program Committee

Donna Blackman, Scripps Institution of Oceanography, La Jolla, California (USA), dblackman@ucsd.edu
Joe Cann, University of Leeds (UK), j.cann@see.leeds.ac.uk
Mathilde Cannat, Centre National de la Recherche Scientifique (CNRS), IPGP, Paris (France), cannat@ipgp.fr
Gretchen Früh-Green, ETH, Zurich (Switzerland)
Barbara John, University of Wyoming, Laramie (USA), bjohn@uwyo.edu
Gianreto Manatschal, Ecole et Observatoire des Sciences de la Terre-Université Louis Pasteur, Strasbourg (France), manatschal@illite.u-strasbg.fr
Andrew McCaig, University of Leeds (UK), a.mccaig@earth.leeds.ac.uk
Eleni Morisseau, Cyprus Geological Survey Department, Lefkosia (Cyprus)
Stelios Nicolaides, Cyprus Geological Survey Department, Lefkosia (Cyprus), snicolaides@gsd.moa.gov.cy
Robert Reves-Sohn, Woods Hole Oceanographic Institute, Massachusetts (USA), rsohn@whoi.edu
Anna-Louise Reysenbach, Portland State University, Oregon (USA), reysenbacha@pdx.edu
Cindy Van Dover, Duke University, Beaufort, North Carolina (USA), clv3@duke.edu

Financial Sponsors

The conference organizers acknowledge the generous support of the following sponsors:

ESF       InterRidge      AGU      AGU 

NSF       Ocean Leadership      IPGP      CNRS

Further Information

If you would like to receive future updates about this conference, e-mail: chapman-help@agu.org, or call the AGU Meetings Department: +1-202-777-7330.

For information about the scientific program, please contact one of the conveners via e-mail:

Juan Pablo Canales
Woods Hole Oceanographic Institution, Woods Hole, Massachusetts (USA)
jpcanales@whoi.edu

Javier Escartín
Centre National de la Recherche Scientifique (CNRS), IPGP, Paris (France)
escartin@ipgp.fr