Research Interests
I am interested in the mechanisms that generate the diverse chemical compositions found among arc magmas, and the role played by the separation of both crystalline and liquid sulfides on their budget of ore and related metals. These processes may also affect the potential development of intrusion-related hydrothermal ore deposits. To evaluate the impact of sulfide separation on both magmas, as well as related ore-forming processes in arc environments, I perform experiments at 800-1050°C and ~1 atm by using evacuated sealed quartz tubes and at 100-200 MPa by using welded noble-metal capsules contained in cold-seal pressure vessels. The purpose of these experiments is to examine the stability of sulfides in these environments, and the equilibrium distribution of the ore and related metals of interest among silicate, sulfide, and fluid phases as a function of oxygen and sulfur fugacity.
Published Papers
Simon, A.C., Candela, P.A, Piccoli, P.M., Mengason, M., Englander, L. (2008) The effect of crystal-melt partitioning on the budgets of Cu, Au, and Ag. American Mineralogist (93), 1437-1448. |
MICHAEL MENGASON