The Aleutian island arc is a terrific place to study the processes that create arc crust, due to its relatively simple tectonic setting.
I first got involved in studying the orign of arc crust through a 1994 marine seismic survey I participated in while I still was at WHOI, together with a number of other PI's (Sue McGeary, John Diebold, Nathan Bangs, and Simon Klemperer). The survey consisted of seismic reflection data acquired by the R/V Ewing and wide-angle seismic data acquired on ocean-bottom seismic instruments (which our group deployed from the R/V Alpha Helix) and land instruments on the islands deployed by the Stanford group.