Postal address:

The formation, transport, and emplacement of partially molten rocks on the earth's crust. In particular, the storage conditions and rates of processes of magmas below active volcanoes. Methods: (1) Petrology of igneous rocks: from the polarizing microscope to (sub)micron elemental and isotopic compositions of minerals and glass (electron microprobe, EBSD, FTIR, ion microprobe, LA-ICP-MS). (2) phase equilibria experiments to determine magmas intensive variables pressure, temperature, volatile fugacities. (3) kinetic experiments to determine diffusion coefficients in minerals. (4) numerical modeling of processes including the chemical reequilibration of mineral zoning to determine the rates of magmatic processes.

Andújar, J., Costa, F., Martí, J., Wolff, J.A., Carroll M.R (2008) Experimental constraints on pre-eruptive conditions of the phonolitic magma from caldera-forming El Abrigo eruption, Tenerife (Canary Islands). Chemical Geology 257, 173-194.

Costa, F. and Chakraborty, S. (2008). The effect of water on Si and O diffusion rates in mantle olivine, its relation to dislocation creep and electrical conductivity, and implications for transport processes in the upper mantle. Physics of the Earth Planetary Interior 166: 11-29

Costa F (2008) Residence times of silicic magmas associated with calderas. In: Caldera Volcanism: Analysis, Modelling and Response. Gottsmann J, Marti J (eds) ‘Developments in Volcanology 10: 1-55

Pichavant, M., Costa, F., Burgisser, A., Scaillet, B., Martel, C., and Poussineau, S. (2007). Equilibration scales in silicic to intermediate magmas - Implications for phase equilibrium studies, Journal of Petrology 48, 1955-1972.

Turner, S., and Costa, F. (2007) Measuring time scales of magmatic evolution. Elements 3, 267-272.

Costa F, and Dungan M (2005) Short time scales of magmatic assimilation from diffusion modeling of multiple elements in olivine. Geology 33: 837-840

Costa, F., and Chakraborty, S. (2004). Decadal time gaps between mafic intrusion and silicic eruption obtained from chemical zoning patterns in olivine. Earth and Planetary Science Letters 227, 517-530.

Costa, F., Scaillet, B. and Pichavant, M. (2004). Petrologic and experimental constraints on the pre-eruption conditions of Holocene dacite from Volcán San Pedro (36o S, Chilean Andes) and the importance of sulfur in silicic subduction-related magmas. Journal of Petrology 45, 855-881

Costa, F., Chakraborty, S. and Dohmen, R. (2003). Diffusion coupling between trace and major elements and a model for calculation of magma residence times using plagioclase. Geochimica et Cosmochimica Acta 67, 2189-2200.

Costa, F., Scaillet, B. and Gourgaud, A. (2003). Massive atmospheric sulfur loading of the AD 1600 Huaynaputina eruption and implications for petrologic sulfur estimates. Geophysical Research Letters 30, 1068, doi: 10.1029/2002GL016402.

Costa, F. and Singer, B.S. (2002). Evolution of Holocene dacite and compositionally zoned magma, Volcán San Pedro, Southern Volcanic Zone, Chile. Journal of Petrology 43, 1571-1593.

Costa, F., Dungan, M. and Singer, B. (2002). Hornblende and phlogopite-bearing gabbroic crustal xenoliths from Volcán San Pedro (36o S), Chilean Andes: evidence for melt and fluid migration and reactions in subduction-related plutons. Journal of Petrology 43, 219-241.

Costa, F., Dungan, M. and Singer, B. (2001). Magmatic Na-rich phlogopite in a suite of gabbroic crustal xenoliths from Volcán San Pedro, Chilean Andes: Evidence for a solvus relation between phlogopite and aspidolite. American Mineralogist 86, 29-35.

Costa, F., Dohmen, R., Chakraborty S. (2008) Time Scales of Magmatic Processes from Modeling the Zoning Patterns of Crystals. Reviews in Mineralogy and Geochemistry 69, 545-594.