I am a field based igneous petrologist and volcanologist, with a broad spectrum of interests and analytical tools. I study the geochemical, geochronological, and physical aspects of continental arc magmatic systems. I am interested in magmatic processes, particularly how phenocryst chemistry and textures can be used to infer different processes, including degassing induced crystallization. On a braoder scale, I am interested in the connection between plutonic and volcanic systems and how they evolve over time. I am also interested in how volcanic rocks weather and breakdown, affecting soil and water chemistry.
I work closely with undergraduates on these research topics and support student research in the field and lab throughout the academic year and summer. Recent field work has been done in Panama, central Oregon, and western Mexico. We have employed a variety of analytical techniques and tools, including, LA-ICPMS, electron-microprobe analysis, portable XRF, 40Ar/39Ar geochronology, and GIS.
With our newly acquired CETAC LSX 213 nm laser ablation system, we have the ability to do in-situ analysis of trace elements in phenocrysts. Recently we have begun analyzing plagioclase phenocrysts from the andesitic debris avalanche deposits of Volcan Baru, Panama.
To aid in quick bulk geochemical characterization of samples, we have been using a Bruker SD portable XRF analyzer. This relatively new analytical tool is being calibrated for analayzing different geological materials.
With colleague Kathryn Szramek (Drake University), we are continuing our work of understanding the weathering of volcanic rocks in the Deschutes Basin, Oregon and how their breakdown affects watershed chemistry.
Past Student projects
In the field.....
Hawaii (2003) ----------------- Scotland (2005)
Chile (2007) -------------------- Iceland (2007)