CURRENT RESEARCH PROJECTS

• Geochemical and cosmochemical behavior of the elements.
  
  

• In-situ analyses of elements at ppb (nanograms/gram) concentration levels.
  
  

• Partitioning of Highly Siderophile Elements (HSE, including Platinum Group elements (PGE), Re and Au) in natural (geological and meteoritic samples) and synthetic systems.
  
  

• Li isotopic studies of: surface processes, continental crust formation and evolution, crust-mantle recycling processes, and meteorites.
  
  

• High resolution analyses of HSE abundances in meteorites and terrestrial rocks using high-pressure, carius tube decomposition and isotope dilution.
  
  

• Monitoring deep upwelling events in the oceans: high fidelity records of Cd/Ca, Ba/Ca, and Sr/Ca variations in modern corals, seawater and plankton.
  
  

• Formation and evolution of the continental lithosphere (studies in China and Tanzania).
  
  

• Element partitioning in silicate, oxide, carbonate, sulfide and metal systems: pushing the detection limits of laser ablation methods.
  
  

• In-situ U/Pb geochronology of zircons.
  
  

• Forensic chemical and isotopic analyses.