I have been working on Cu isotope fractionation since about 2000. I have also branched out into measuring the following other transition metals: Fe, Ni, Zn, Mo, Cd, Sn and Te. There are a variety of applications the isotope data can address such as mineral exploration, hydrometallurgy, economic geology, environmental geology, archeology, mineralogy, soil science, and hydrogeology. The isotopes serve as a fingerprinting tool for determination of sources of metal and also are used to show fundamental earth process. Follow links to see examples of each type of work.