My area of research is within the broad field of Hydrogeology and Environmental Isotope Geochemistry. Specifically my research interests include biogeochemical cycling and isotope geochemistry of redox active elements and contaminants such as Cr, Se, U, Mo and biogeochemical cycling of arsenic. I also use isotopes as a tracers of geochemical process acting at or near the earths surface, in particular continental weathering and transport of contaminants and solutes

Developing isotope geochemistry tools and proxies is an inherent part of my interests: especially in applications involving the fate and transport of redox-active contaminants, paleo-oceanography and carbon cycling on geological time-scales.

Projects include:

Groundwater flow and transport in the El Paso region (Hueco and Mesilla Bolsons) and Southern High Plains

Continental Weathering and carbon cycle: Alaskan Rivers

Fate and transport of Cr using Cr stable isotopes (Laboratory experiments and a Field studies in Mexico and China)

Fate and Transport of Arsenic using redox tracers and isotopes of S, O, Cr, Se etc.

Geochemical Modeling of injections of concentrates from El Paso's and the World's largest Inland Desalination Plant.

Geology 1303  - click here