Ph.D. Geology and Geophysics (1999) University of Hawaii, Honolulu, HI
B.A. Geophysical Sciences (1992), Departmental and General Honors University of Chicago, Chicago, IL
Research Interests:
Trace element and isotope geochemistry with applications to the fields of volcanology, igneous petrology, and geochronology
Research Projects:
The high-purity Th-229 project
The size and shape of Kilauea Volcano's summit magma storage reservoir: a geochemical probe
Remelting of recently depleted mantle within the Hawaiian plume inferred from the 226Ra-230Th-238U disequilibria of Pu‘u ‘Ō‘ō eruption lavas
A rapid fluctuation in the mantle source and melting history of Kilauea Volcano inferred from the geochemistry of its historical summit lavas (1790-1982)
Molybdenum isotope geochemistry Determination of mass-dependent molybdenum isotopic variations by MC-ICP-MS: An evaluation of matrix effects
Selected Publications:
Pietruszka AJ, EH Hauri, RW Carlson, MO Garcia (2006). Remelting of recently depleted mantle within the Hawaiian plume inferred from the 226Ra-230Th-238U disequilibria of Puu Oo eruption lavas. Earth and Planetary Science Letters 244:155-169.
Pietruszka AJ, RJ Walker, PA Candela (2006). Determination of mass-dependent molybdenum isotopic variations by MC-ICP-MS: an evaluation of matrix effects. Chemical Geology 225:121-136.
Norman M, MO Garcia, AJ Pietruszka (2005). Trace-element distribution coefficients for pyroxenes, plagioclase, and olivine in evolved tholeiites from the 1955 eruption of Kilauea Volcano, Hawaii, and the petrogenesis of differentiated rift-zone lavas. American Mineralogist 90:888-899.
Snyder DC, E Widom, AJ Pietruszka, RW Carlson (2004). The role of open-system processes in the development of silicic magma chambers: a chemical and isotopic investigation of the Fogo A trachyte deposit, São Miguel, Azores. Journal of Petrology 45:723-738.
Garcia MO, AJ Pietruszka, JM Rhodes (2003). A petrologic perspective of Kilauea Volcano’s summit magma reservoir. Journal of Petrology 44:2313-2339.
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