Ph.D. Massachusetts Institute of Technology, 1983
B.S. (Honors) Hofstra University, 1977
Ph: (305) 348-3471
research centers on the use of geochemistry to explore
processes affecting the earth's mantle and crust. A
special research emphasis is on igneous rocks from convergent
plate margins, conducted with funding from NSF's Margins
and Subduction Factory Initiatives. Study areas include
the active volcanoes and basement rocks of the central
Chilean Andes (Southern Volcanic Zone) and the island
arcs and marginal basins of the western Pacific Ocean.
in the Chilean Andes have been conducted since 1981
in collaboration with colleagues at Chilean universities.
Fieldwork and sample collection in southern Chile is
an important part of this research, while geochemical
analyses are done in the Earth Sciences Department at
FIU. Research topics center on the relationship between
magma chemistry, edifice type, crustal structure, as
well as subduction parameters.
in the Philippine Sea region has continued since 1979,
with emphasis on Tertiary and older rocks associated
with the Izu-Bonin-Mariana arc. Most sampling for this
research has been done by DSDP, ODP and IODP drilling, and
dredging cruises. Current research centers on the oldest
igneous activity in this region and its implications for the early tectonic history of the Western Pacific and subsequent arc magmatism.
Hickey-Vargas, R., Bizimis, M., Deschamps, A. (2008) Onset of the Indian Ocean isotopic signature in the Philippine Sea Plate: Hf and Pb isotope evidence from Early Cretaceous terranes, Earth and Planetary Science Letters, 268, 255-267.
Reagan, M.K., Hanan, B.B., Hartman, B.S., Heizler, M.T., Hickey-Vargas, R. (2008) Petrogenesis of volcanic rocks from Saipan and Rota, Mariana Islands and implications for the evolution of nascent island arcs, Journal of Petrology,49, 441-464.
Chris Dale, Ambre Luguet, Colin G Macpherson, Graham Pearson, and Rosemary Hickey-Vargas (2008) Extreme platinum-group element fractionation and variable Os isotope compositions in Philippine Sea basalts: Tracing mantle source heterogeneity, Chemical Geology, 248, 213-238.
R., Savov, I., Bizimis, M., Ishii, T. and Fujioka, K.
(2006) Origin of diverse geochemical signatures in igneous
rocks from the West Philippine Basin: Implications for
tectonic models, In: "Back-Arc Spreading Systems:
Geological, Biological, Chemical and Physical Interactions",
D. Christie, editor, AGU Geophysical Monograph
Series 166, 287-303.
R. (2005) Basalt and tonalite from the Amami Plateau,
Northern West Philippine Basin: New age and geochemical
results and their petrologic and tectonic implications,
The Island Arc 14, 653-665.
I., Hickey-Vargas, R., D'Antonio, M., Ryan, J. and Spadea,
P. (2005) Petrology and geochemistry of West Philippine
Basin back-arc basin basalts and early Palau-Kyushu
arc volcaniclasts from ODP Leg 195, Site 1201: Implications
for the evolution of the Izu-Bonin- Mariana arc, Journal
of Petrology, doi: 10.1093/petrology/egi075, 23pp.
M., L. López-Escobar, J.L. Palma, R. Hickey-Vargas and C. Roeschmann (2004) Late tertiary volcanic episodes
in the area of the city of Santiago de Chile: new geochronological
and geochemical data, Journal of South American
Earth Sciences, Volume 17, 227-238.
R., Lopez-Escobar, L., Moreno, R., Clavero, J., Lara,
P and Sun, M. (2004) Magmatic evolution of Villarrica
Volcano, in Lara, L.E. and Clavero, J. (Eds) Villarrica
Volcano (39.5°S), Southern Andes, Chile, Servicio
Nacional de Geologia y Mineria, Boletin No. 61,
R., Sun, M., Lopez-Escobar, L., Moreno-Roa, H., Reagan,
M.K., Morris, J.D. and Ryan, J.G. (2002) Multiple subduction
components in the mantle wedge: Evidence from eruptive
centers in the Central Southern volcanic zone, Geology,
- EAR: SOTA 2007 and GSA Field Forum in Chile:
Support for Graduate Students and Latin American Participation
(6/1/2006-5/31/2007, $50K), co-PI with Rebecca Lange
(U. Michigan) and Anita Grunder (Oregon State)
- EAR: Generation of Basaltic and Andesitic Magma in
the Central Southern Volcanic Zone (1/1/2004-12/31/2007,
- OCE (Margins): Collaborative Research: Magma Generation
in the early Mariana Arc system revisited (1/2001 -
12/2005, $380K), collaboration with Mark Reagan (U Iowa)
and Barry Hanan (San Diego State U).
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