Crustal Arc Structure and Evolution

Volcanic arcs are the building blocks of continental crust, but fundamental questions remain on the formation and evolution of that crust globally. How do volcanic arcs interact with pre-existing overriding crust? How does that affect magma transport and emplacement? How localized are these processes to a particular subduction zone? How do we bridge the gap between detailed studies of individual volcanoes, and arc scale processes?

Aleutian arc crustal thickness.

Along arc velocities in the Cascades.

Receiver functions from the Aleutian arc.

Projects

Lithospheric and Plate Interface Structure of the Cascadia Subduction Zone

Crustal Structure of the Aleutian Island Arc

Publications

Till, C. B., A. Kent, G. A. Abers, H. A. Janiszewski, J. B. Gaherty, B. Pitcher, (2019) The Causes of Spatiotemporal Variations in Erupted Fluxes and Compositions Along a Volcanic Arc, Nature Communications.

Crosbie, K. J., G. A. Abers, M. E. Mann, H. A. Janiszewski, K. C. Creager, C. Ulberg, S. Moran, (2019) Shear velocity structure from ambient noise and teleseismic surface wave tomography in the Cascades around Mount St. Helens, Journal of Geophysical Research

Janiszewski, H. A., G. A. Abers, Shillington, D.J., and J. A. Calkins, (2013) Crustal structure along the Aleutian island arc: New insights from receiver functions constrained by active source data, Geochem. Geophys. Geosys