Emily Mullen

Postdoctoral Fellow


My research addresses the origin and evolution of subduction zone magmas through study of the Cascade Arc (western North America) by integrating high-precision geochemical measurements with petrologic data. I am particularly interested in investigating mantle source compositions, crustal contamination, and the spatial and compositional evolution of magmatism since inception of the arc. I am using the PCIGR's state-of-the-art mass spectrometric facilities to measure high-precision Sr, Nd, Hf, and Pb isotopic ratios and trace element abundances. 

  • Petrology, geochemistry, geochronology of the diverse magmatic provinces of Washington and British Columbia (Northern Cordilleran volcanic belt, Alert Bay, Anahim, Wells-Gray Clearwater, Okanogan batholith), and the Stillwater Complex layered mafic intrusion.
  • Re-Os isotopic analysis, high-precision Sr-Nd-Hf-Pb isotopic analyses.
  • High precision isotopic comparisons between global subduction zones.
  • Mapping of accreted terrane boundaries using the compositions of crustal melts.
  • Compositional and spatial evolution of magmatism since inception of the Cascade Arc.
  • Thermobarometry, oxybarometry, hygrometry of magmas by mineral and melt inclusion microanalysis.