Research Interests: Understanding crustal processes and fundamental and applied problems using field work, mineralogy, petrology, geochemistry, isotope geochemistry, modeling, and state-of-the-art analytical techniques. Current and recent projects include: Fe isotope fractionation in crustal magmatic systems; fluid/rock interaction; geochemistry and genesis of rare-metal deposits in granitic pegmatites; the origin of color in minerals; early Earth's geochemistry and genesis of BIFs; geochemistry and genesis of hydrothermal sulfide deposits and spatially associated exhalites; evolution of metamorphic rocks and P-T reconstructions.