Compositional changes in the UCC through time revealed by tungsten isotopes

Andrea Mundl, University of Maryland, College Park, MD, United States, Richard J Walker, Univ Maryland, College Park, MD, United States, Jesse Ray Reimink, Carnegie Institution for Science Washington, Washington, DC, United States, Roberta L Rudnick, University of California Santa Barbara, Department of Earth Sciences, Santa Barbara, CA, United States and Richard M Gaschnig, University of Massachusetts Lowell, Lowell, MA, United States