Sunday
2:00 pm - 9:00 pm
Arrival and Check-in
6:00 pm - 7:00 pm
Dinner
7:30 pm - 7:40 pm
Introductory Comments by GRC Site Staff / Welcome from the GRC Chair
7:40 pm - 9:30 pm
Observational Evidence for Deep Recycling
Observations from geochemistry and geophysics provide evidence for long-term recycling of materials from Earth's surface to the deep interior and back again. This recycling may have started at a very early stage of Earth history. The geochemical and isotopic composition of plume basalts, mineral inclusions in diamonds, and the seismological detection of slabs of oceanic lithosphere descending into the deep Earth, amongst other observations, provide insight into the recycling process, both as it currently operates and how it may have changed over time.
Discussion Leader: Emilie Thomassot (Université de Lorraine, France)
7:40 pm - 7:50 pm
Introduction by Discussion Leader
7:50 pm - 8:25 pm
Fabrizio Nestola (University of Padova, Italy)
"Evidence for Deep Recycling from Sublithospheric Diamonds"
8:25 pm - 8:40 pm
Discussion
8:40 pm - 9:15 pm
Meghan Miller (Australian National University, Australia)
"Deep Focus Earthquakes: What Can They Tell Us About Heterogeneities Within Subducted Slab?"
9:15 pm - 9:30 pm
Discussion
Monday
7:30 am - 8:30 am
Breakfast
8:30 am - 9:00 am
Group Photo
9:00 am - 12:30 pm
Subduction Zones: Present-Day Conveyor Belts to the Mantle
Subduction zones are the most obvious settings for recycling today: cold, hydrated oceanic lithosphere descends into the mantle carrying sediments and volatiles. At certain depths, volatiles and perhaps melts are released from the subducting slab, fluxing the overlying mantle and causing it to melt. A revolution in new data - seismic imaging, space-based observations, geochemical observations of subduction zone volcanoes, laboratory studies of materials at extreme pressures and temperatures - is yielding new insight into subduction zone processes, addressing questions related to the fate of subducted materials and melt production and transport.
Discussion Leader: Geoff Abers (Cornell University, USA)
9:00 am - 9:10 am
Introduction by Discussion Leader
9:10 am - 9:45 am
Junichi Nakajima (Tokyo Institute of Technology, Japan)
"Listening to Slab Dehydration"
9:45 am - 10:05 am
Discussion
10:05 am - 10:35 am
Coffee Break
10:35 am - 11:10 am
Esteban Gazel (Cornell University, USA)
"What Comes Up: Insights on Recycling from Magma Geochemistry"
11:10 am - 11:30 am
Discussion
11:30 am - 12:05 pm
Ikuko Wada (University of Minnesota, USA)
"Physical Controls on Volatile Transport and Melt Generation in Subduction Zones"
12:05 pm - 12:30 pm
Discussion
12:30 pm - 1:30 pm
Lunch
1:30 pm - 4:00 pm
Free Time
3:00 pm - 4:00 pm
The GRC Power Hourâ„¢
The GRC Power Hourâ„¢ is designed to address challenges women face in science and issues of diversity and inclusion. The program supports the professional growth of all members of our communities by providing an open forum for discussion and mentoring.
Organizers: Christy Till (Arizona State University, USA) and Carolina Lithgow-Bertelloni (University of California, Los Angeles, USA)
4:00 pm - 6:00 pm
Poster Session
6:00 pm - 7:00 pm
Dinner
7:30 pm - 9:30 pm
Surface Connections
Ingassing and outgassing of water, carbon, and other volatile species affect both the solid Earth and the oceans and atmosphere. The history of this cycling has likely varied through time. How might the solid Earth have influenced the atmosphere, and how have the evolving conditions at Earth's surface impacted the solid Earth?
Discussion Leader: Cin-Ty Lee (Rice University, USA)
7:30 pm - 7:40 pm
Introduction by Discussion Leader
7:40 pm - 8:15 pm
Clara Blättler (University of Chicago, USA)
"What Can the Sedimentary Record Teach Us About Recycling?"
8:15 pm - 8:35 pm
Discussion
8:35 pm - 9:10 pm
Marie Edmonds (University of Cambridge, United Kingdom)
"Volatile Cycling and Volcanic Emissions"
9:10 pm - 9:30 pm
Discussion
Tuesday
7:30 am - 8:30 am
Breakfast
9:00 am - 12:30 pm
Plate Tectonics Processes and Outcomes
Session in memory of Louise Kellogg. Earth is the only planet in our solar system that has plate tectonics. Major questions about this fundamental process on Earth revolve around what initiates subduction, how plate configurations have changed over Earth history, the role of phase changes in driving subduction; formation, alteration and fate of oceanic lithosphere and its role as a locus of material exchange.
Discussion Leader: David Bercovici (Yale University, USA)
9:00 am - 9:10 am
Introduction by Discussion Leader
9:10 am - 9:45 am
Dietmar Muller (The University of Sydney, Australia)
"Next Generation Surface Kinematic Constraints for Global Geodynamic Models"
9:45 am - 10:05 am
Discussion
10:05 am - 10:35 am
Coffee Break
10:35 am - 11:10 am
Christy Till (Arizona State University, USA)
"Examining the Causes of Along Strike Geologic Heterogeneity in Volcanic Arcs"
11:10 am - 11:30 am
Discussion
11:30 am - 12:05 pm
Laurent Montesi (University of Maryland, USA)
"Strength of Plates and Plate Boundaries"
12:05 pm - 12:30 pm
Discussion
12:30 pm - 1:30 pm
Lunch
1:30 pm - 4:00 pm
Free Time
4:00 pm - 6:00 pm
Poster Session
6:00 pm - 7:00 pm
Dinner
7:30 pm - 9:30 pm
Recycling Beyond Subduction: Relamination and Density Foundering
Recycling may occur by means other than subduction of sea floor sediments and basalts. Foundering of high density mafic to ultramafic lithologies from the base of the continental crust (sometimes call 'delamination') has become a popular hypothesis to explain why the continental crust has an evolved (non-basaltic) composition. Other recycling processes include tectonic erosion and 'relamination', the subduction of continental crust followed by buoyant ascent of the less dense lithologies to underplate (relaminate) the lower crust.
Discussion Leader: Taras Gerya (Institute of Geophysics, ETH Zurich, Switzerland)
7:30 pm - 7:40 pm
Introduction by Discussion Leader
7:40 pm - 8:15 pm
Claire Currie (University of Alberta, Canada)
"Recycling by Density Foundering"
8:15 pm - 8:35 pm
Discussion
8:35 pm - 9:10 pm
Bradley Hacker (University of California, Santa Barbara, USA)
"Relamination: The Hypothesis and Evidence"
9:10 pm - 9:30 pm
Discussion
Wednesday
7:30 am - 8:30 am
Breakfast
9:00 am - 12:30 pm
Geodynamics of Recycling
Material recycling, including delamination of subducting slabs, is ultimately controlled by the forces at play. This session will explore the dynamics and physical properties that control how shallow materials are recycled into the mantle. For example, which static and transport physical properties are key to recycling, and how might these be affected the presence or absence of water?
Discussion Leader: Carolina Lithgow-Bertelloni (University of California, Los Angeles, USA)
9:00 am - 9:10 am
Introduction by Discussion Leader
9:10 am - 9:45 am
Magali Billen (University of California, Davis, USA)
"Slabs as Agents of Material Recycling"
9:45 am - 10:05 am
Discussion
10:05 am - 10:35 am
Coffee Break
10:35 am - 11:10 am
Matthew Weller (Institute for Geophysics, University of Texas at Austin, USA)
"The Upside Down: Dynamics and Material Transport Under Variable Lid States and Conditions"
11:10 am - 11:30 am
Discussion
11:30 am - 12:05 pm
Hauke Marquardt (University of Oxford, United Kingdom)
"Physical Properties of Mantle Materials and Their Importance to Understand Recycling"
12:05 pm - 12:30 pm
Discussion
12:30 pm - 1:30 pm
Lunch
1:30 pm - 4:00 pm
Free Time
4:00 pm - 6:00 pm
Poster Session
6:00 pm - 7:00 pm
Dinner
7:00 pm - 7:30 pm
Business Meeting
Nominations for the Next Vice Chair; Fill in Conference Evaluation Forms; Discuss Future Site and Scheduling Preferences; Election of the Next Vice Chair
7:30 pm - 9:30 pm
Early Earth Processes
Conditions within and upon Earth during the Archean were different than today: Earth was hotter, the crust composition may have been fundamentally different and the atmosphere was devoid of oxygen, but had sufficient greenhouse gases to counteract as less brilliant sun, maintaining oceans on the surface. What implications do these different conditions have for the nature of recycling?
Discussion Leader: Grant Bybee (University of the Witwatersrand, South Africa)
7:30 pm - 7:40 pm
Introduction by Discussion Leader
7:40 pm - 8:15 pm
Adrien Vezinet (University of Alberta, Canada)
"Evidence for Early Continental Crust Formation and Recycling: The Zircon Story"
8:15 pm - 8:35 pm
Discussion
8:35 pm - 9:10 pm
Michael Brown (University of Maryland, USA)
"Plate Tectonics and the Archean Earth"
9:10 pm - 9:30 pm
Discussion
Thursday
7:30 am - 8:30 am
Breakfast
9:00 am - 12:30 pm
Surface-Interior Recycling on Other Rocky Planets
The geological, geophysical, and geochemical records on the other terrestrial planets provide important sources of comparison and contrast with Earth, particularly early Earth. Whereas large-scale effusive volcanic activity on Mercury ceased early in solar system history (within the terrestrial Hadean), large-scale resurfacing by volcanic and sedimentary processes continued to much later times on Mars and Venus. Lithospheric-scale processes on Venus, the only Earth-size planet in our solar system other than our own, differed from those on the smaller rocky planets.
Discussion Leader: Sean Solomon (Lamont-Doherty Earth Observatory, Columbia University, USA)
9:00 am - 9:10 am
Introduction by Discussion Leader
9:10 am - 9:45 am
Paul Byrne (North Carolina State University, USA)
"Geological Evidence for Recycling on Venus, Mars, and Mercury and Implications for Other Rocky Planets"
9:45 am - 10:05 am
Discussion
10:05 am - 10:35 am
Coffee Break
10:35 am - 11:10 am
Arya Udry (University of Nevada, Las Vegas, USA)
"Petrological and Geochemical Evidence for Recycling on Venus, Mars and Mercury"
11:10 am - 11:30 am
Discussion
11:30 am - 12:05 pm
Suzanne Smrekar (Jet Propulsion Laboratory, NASA, USA)
"Geophysical Evidence for Recycling on Venus, Mars, and Mercury"
12:05 pm - 12:30 pm
Discussion
12:30 pm - 1:30 pm
Lunch
1:30 pm - 4:00 pm
Free Time
4:00 pm - 6:00 pm
Poster Session
6:00 pm - 7:00 pm
Dinner
7:30 pm - 9:30 pm
Unsolved Problems and Future Directions
A tradition for the Interior of the Earth GRC is to sum up with a view of the exciting unsolved problems and possible future directions. This session will highlight important areas of research that hold promise for advancing our understanding of Earth's interior.
Discussion Leader: Steven Shirey (Carnegie Institution for Science, USA)
7:30 pm - 7:40 pm
Introduction by Discussion Leader
7:40 pm - 7:55 pm
Chhavi Jain (Yale University, USA)
"On a New Approach to Improve Our Estimates on Olivine Rheology by Using Geodynamic Modeling"
7:55 pm - 8:05 pm
Discussion
8:05 pm - 8:20 pm
Antoniette Grima (University College London, United Kingdom)
"Orphan Slabs: A Marker for Tectonic Regime Shifts?"
8:20 pm - 8:30 pm
Discussion
8:30 pm - 9:10 pm
Bradford Foley (Pennsylvania State University, USA)
"Unanswered Questions in Planetary Evolution"
9:10 pm - 9:30 pm
Discussion
Friday
7:30 am - 8:30 am
Breakfast
9:00 am
Departure