Unit Affiliation: Geochemistry, Lamont-Doherty Earth Observatory (LDEO)
The project targeted unusually Ni-rich olivines that were reported from young volcanic rocks in Transmexican Volcanic Belt. We investigated olivines from a range of basaltic to andesitic rocks from composite volcano Popocatepetl and its surrounding monogenetic volcanoes.
OUTCOMES: Results show that high-Ni olivines are common in basaltic and andesitic melts. The entirety of compositonal systematics and spatial and temporal constraints show that melts crystallizing high-Ni olivines are formed >50 km deep in the Earth's mantle that is filtrated by silicic components released from the subducting slab that passes at ca. 100 km depth beneath the arc.
Cl Isotope Systematics of the Neogene Izu Bonin Arc Volcanic Rocks
Collaborative research: Geochemical variation of the Pacific crust subducting beneath the Izu-Bonin
Collaborative Research: Testing Source vs. Crustal Processing in High-Mg# Arc Magmas by Os-O-He-Olivine Systematics
Constraints on the Composition of Subducting Oceanic Crust in the Northwest Pacific Ocean Basin