1. Collaborative Projects: MARGINS - GeoSwath - EarthScope Conveners Geoff Abers, Chair, MARGINS Steering Committee Basil Tikoff, GeoSwath Organizer Program Committee Conveners Geoff Abers, Chair, MARGINS Steering Committee Basil Tikoff, GeoSwath Organizer Program Committee Cascadia Anne Trehu Tim Melbourne Paul Wallace Salton Trough / Walker Lane Danny Stockli Paul Umhoefer Roger Buck Suzanne Janecke

2. Why we are here  MARGINS, EarthScope, GeoSwath have common interests: identify  Formulate key science questions for two critical areas  Use to motivate future plans, proposals  Devise strategies to approach, given MARGINS and Earthscope focuses  Immediate Goal: generate short “micro- whitepaper” for rapid publication  This is just a start…  MARGINS, EarthScope, GeoSwath have common interests: identify  Formulate key science questions for two critical areas  Use to motivate future plans, proposals  Devise strategies to approach, given MARGINS and Earthscope focuses  Immediate Goal: generate short “micro- whitepaper” for rapid publication  This is just a start…

3. Meeting Organization  MARGINS, GeoSwath perspectives  Break into 2 groups - move in wall  Coffee, lunch provided  Short presentations of new work  Discuss critical problems for future  Reunite / remove wall for wrapup  Conveners stay to write  Available on web soon to all participants  MARGINS, GeoSwath perspectives  Break into 2 groups - move in wall  Coffee, lunch provided  Short presentations of new work  Discuss critical problems for future  Reunite / remove wall for wrapup  Conveners stay to write  Available on web soon to all participants

4. Get all presentations to conveners during 1st break

6. MARGINS Goals Geoff Abers, Boston University Chair, MARGINS Steering Committee Geoff Abers, Boston University Chair, MARGINS Steering Committee The MARGINS program Initiatives, Focus Sites Next Steps

7. The MARGINS Concept  Broad Initiatives through elucidated through community workshops: Science Plan  All Initiatives “cross the shoreline”  Focus Sites concentrate resources The Machinery:  Independent NSF Panel funds proposals  Steering Committee represents Community  Logistics and coordination: MARGINS Office  Broad Initiatives through elucidated through community workshops: Science Plan  All Initiatives “cross the shoreline”  Focus Sites concentrate resources The Machinery:  Independent NSF Panel funds proposals  Steering Committee represents Community  Logistics and coordination: MARGINS Office

8. Initiatives & Focus Sites The cycling of material, fluids, and energy from trench to arc and deep earth; growth of continents Subduction Factory SubFac Central America Izu-Bonin-Mariana Allied: Cascadia, Aleutians Driving forces for rift initiation, propagation and evolution, from continent to ocean basin Rupturing Continental Lithosphere RCL Gulf of California/Salton Trough Allied: Red Sea

9. Initiatives & Focus Sites Production, transport & storage of sediments & solutes from source to sink Sediment Source-to-SInk S2S Gulf of Papua Waipaoa, N.Z. Nature and genesis of large subduction- zone thrust earthquakes and the faults that make them Seismogenic Zone SEIZE Nankai Central America

10. Broad Integration  Approaches include: seismology, marine geology, drilling, geodesy, petrology, geochemistry, geodynamical modeling, rock deformation, sedimentology, structural geology, geochronology, geomorphology, stratigraphy, fluvial & porewater hydrology, coastal hydrodynamics, sediment chemistry, etc……onshore & offshore… funded through 1 panel!  Individual awards typically within discipline; challenge is to foster cross-discipline integration and synthesis  Approaches include: seismology, marine geology, drilling, geodesy, petrology, geochemistry, geodynamical modeling, rock deformation, sedimentology, structural geology, geochronology, geomorphology, stratigraphy, fluvial & porewater hydrology, coastal hydrodynamics, sediment chemistry, etc……onshore & offshore… funded through 1 panel!  Individual awards typically within discipline; challenge is to foster cross-discipline integration and synthesis

11. Program Status  First initiatives started in 2000  All Science Plans accepted by 2004  ~80 funded projects; 110 PI’s; all initiatives; ~$6M/yr  2004 program review emphasized more integration  SubFac: many projects in Focus Sites; relatively mature  RCL: 2005 change of Red Sea from Focus to Allied Site  Program review/renewal in 2009: what follows? Are there critical experiments that are not doable in current Focus Sites?  First initiatives started in 2000  All Science Plans accepted by 2004  ~80 funded projects; 110 PI’s; all initiatives; ~$6M/yr  2004 program review emphasized more integration  SubFac: many projects in Focus Sites; relatively mature  RCL: 2005 change of Red Sea from Focus to Allied Site  Program review/renewal in 2009: what follows? Are there critical experiments that are not doable in current Focus Sites? RSB 25 20 15 20 10 Cocos Ridge Nicaragua Costa Rica Panama Honduras Guatemala El Salvador Mexico

12. Motivations for cooperative studies  Western U.S. has 1 Focus Site, and critical localities complementary to others  Cascadia ls “allied” site: accretionary, young subduction zone  Without Red Sea, should maximize return from (expanded?) GoC/Salton Site  Capitalize on EarthScope Facility  … and GeoSwath, and ORION, and …  Western U.S. has 1 Focus Site, and critical localities complementary to others  Cascadia ls “allied” site: accretionary, young subduction zone  Without Red Sea, should maximize return from (expanded?) GoC/Salton Site  Capitalize on EarthScope Facility  … and GeoSwath, and ORION, and …

13. Goals at this Workshop  Develop science rationale for expanded studies in 2 areas of overlap  Cascadia  Walker Lane / Salton Trough  Produce succinct description of opportunities  Where do we go from here?  Develop science rationale for expanded studies in 2 areas of overlap  Cascadia  Walker Lane / Salton Trough  Produce succinct description of opportunities  Where do we go from here?