1. Background on Tectonics and Mantle Convection
- How do plumes and ridges fit into ideas regarding mantle convection
- What is a plume, how are they distributed around the globe?
- How do the properties of plumes and ridges vary?
- What would be a canonical model for the chronology of a p/r interaction?
- What are the burning, unanswered questions regarding plumes, ridges, and p/r interactions?
- What kinds of data and modeling are needed to answere the important questions?
2. Case Study 1: Iceland/Northern MAR - Stuck in the middle?
- What is the pattern of mantle flow beneath Iceland?
- How big is the Iceland plume? Where is it?
- How far downrift can the chemical and mechanical influence of the Iceland plume be traced?
- How and where is the plume fragmented and distributed to discrete volcanic systems?
- What is the role of the Iceland plume in the early stages of rifting on the northern MAR?
- What do the V-shaped ridges tell us about the p/r interaction and its influence on parameters such as lithospheric strength and upper mantle flow?
3. Case Study 2: Galapagos/GSC - Gone but not forgotten.
- How has the interaction between the Galapagos plume and the Galapagos Spreading Center evolved over time?
- How does lava chemistry vary along the GSC and what does this imply regarding the p/r interaction?
- What is the present pattern of mantle flow beneath this system?
-What does the mantle matrix do between the two upwelling features?
- Is there still a melt connection?
- How big is the Galapagos plume? Where is it?
4. Case Study 3: Cobb/JdFR - The first days are the hardest
- Is the Cobb hotspot a plume?
- How has it behaved in the hot-spot reference frame?
- Does it have a geochemical signature?
- Where is it presently located?
- How deep is it rooted?
- What is the pattern of mantle flow beneath this system?
- When did the JdFR start bending towards the Cobb hotspot?
- How is melt distributed beneath the central JdFR?
- How does lava chemistry vary along the JdFR/Cobb region?
- What patterns of matrix and melt flow are consistent with the observational and theoretical constraints?
- How might long-term observatories, such as NeMO and Neptune contribute to our understanding of the p/r interaction?
- How do ridges, plumes, and p/r interactions influence the global biogeography of chemosynthetic systems?
- How do the myriad millions of near-ridge seamounts relate to p/r interactions?
- How fixed is the hot spot reference frame?
- Can large plumes create new plate boundaries?
- How deep is the source region for hotspots?