ExTerra: Evolution of arc crust

  Kimpton Hotel Monaco
700 F Street NW, Washington, DC 20004
Athens Room
 icon-calendar Sunday December 9, 2018, 8:00 AM – 12:15 PM


Stacia Gordon (University of Nevada-Reno) and Alicia Cruz-Uribe (University of Maine)


Inspired by the success of convergent margin research funded through GeoPRISMS and discussions generated at ExTerra meetings, this workshop will gather together researchers with expertise in all aspects of the arc system on the Sunday preceding the AGU Fall Meeting in Washington, DC. The goal is to gather a broad group of geoscientists that use a variety of different approaches (field, experimental, petrological, geochemical, geochronological, seismic, numerical modeling) applied to different parts of the arc (the subducting plate, mantle, magma plumbing system, supracrustal rocks). The group will discuss what the major questions are that still surround the evolution of arc crust and what tools and methods will best answer these questions. The meeting will also serve to provide a space where early career researchers can network with more senior personnel, and where scientists from a variety of subdisciplines who work on different arc sections around the world can compare and contrast observations. In addition, this gathering of the  arc crust community will make a plan for future convergent margin research, specifically on arc crust. It is important to establish new goals and questions concerning arc crust before GeoPRISMS has fully ended to keep the momentum that this program established.

The format of the workshop will include a keynote lecture given by Oliver Jagoutz (MIT), followed by breakout groups on different areas of scientific interest within the broader arc system: 1) subduction/mantle influences, 2) plutonic plumbing system/magma storage, 3) volcanic components, and 4) supracrustal (metamorphic) components. One proposed outcome of the workshop will be for multiple groups to develop collaborative proposals to NSF EAR programs for research and field forums/institutes, which could then be leveraged for the submission of a larger proposal.

8-8:45 | Social Hour (Coffee, pastries, registration)

8:45-9 | Welcome & Introduction (GeoPRISMS Office Chair Demian Saffer and Mini-Workshop Conveners Stacia Gordon and Alicia Cruz-Uribe)

9-9:45 | Keynote (Ollie Jagoutz) (30 minute talk, 15 minutes for questions/discussion)

9:45-10:45 | Breakout discussions (4 groups)

  • What are the outstanding questions that can be addressed?
  • How can we better integrate field studies with experimental and modeling approaches?
  • What data and meta-data do we need to collect and store?
  • How can we make data and samples accessible to all?

10:45-11 | Coffee break

11-12 | Group reports/group discussion

12-12:15 | Wrap Up