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NSF funded and in collaboration with Dr. David Hilton (Scripps Institute of Oceanography) and Dr. Jim Walker (Northern Illinois University)
Resolving contributions from the subducting slab, mantle wedge and overlying crust to arc magmatism is of fundamental importance to attempts of quantifying fluxes from and between individual reservoirs which constitute the subduction factory.
The Central American arc was chosen because it possess a number of unique features which allow explicit linkages to be forged between systematic variations in volcanic output and systematic variations in subduction parameters, specifically in slab dip, sediment supply and crustal thickness. The Central American arc also permits continuous, subaerial examination of volcanic output over 100 kilometers across the arc in two separate locations, southeastern Guatemala/western El Salvador and Honduras.
Our work includes the sampling of fluids and recent lavas to obtain volatile compositions. It also includes remote SO2 flux measurements to obtain volatile fluxes from the arc.
In Costa Rica we worked closely with local scientists from ICE who provided invaluable support and insight.
 Arenal Volcano |
 Dave, Alisson and Chico sampling |
 Tobias and Mindy sampling geothermal wells |  Sampling hot pools at Miravalles |
 Poas Volcano with crater lake |
 Dave, Alisson and Tobias inside of Poas |