Ariel Anbar's Group at Arizona State University

	Deep Time Drilling: A collaborative research effort aimed at improving our understanding of ocean redox evolution in the Precambrian.


	Evolution of the metallome: We are investigating the hypothesis that metallomic differences among organisms evolved in response to changes in metal availability in ancient oceans.


	Isotopes and Forensics:


	Isotopes in anthropology: Strontium and oxygen isotopes in archaeological human remains can be used to identify migration patterns and, in some cases, the geographic origins of individuals in the past.


	Metal isotope mechanisms: What causes metal stable isotope fractionation? The answer to this question determines how these new isotope systems can be applied. We investigate isotope effects through a combination of field, laboratory and theoretical investigations. For example, we are studying Mo isotope effects in the Baltic Sea, in laboratory adsorption experiments and through computational chemical modelling.


	Metal Isotopes in Atmospheric Aerosols:


	Metals and medicine:


	Microbes, metals & minerals: How do microbes extract metals from minerals? We are exploring the production of metal-chelating organic ligands by desert crust bacteria in a collaboration with the Hartnett and Garcia-Pichel groups at ASU, and Fe and Mo isotope fractionation during microbially-mediated weathering together with Sue Brantley's group at Penn State.


	Paleoredox proxies: The environmental chemistry of many metals depends on the availability of O2. Taking advantage of this dependence, we study Mo and Fe concentrations and isotope compositions in ancient sediments for clues about changes in environmental oxygenation.


	The late bombardment of the earliest environment: