Stephen ParmanAssociate Professor of Earth, Environmental, and Planetary Sciences
I received my Ph.D. in Geology and Geochemistry from the Massachusetts Institute of Technology in 2001. I came to Brown after three years as Lecturer at Durham University, Great Britain. I am considered a leading expert on the behavior of volatiles in the Earth's interior. My work on water in early Earth magmas is providing new insights into the thermal evolution of the Earth. Likewise, my recent research on noble gas solubility in the mantle is challenging the existing models of mantle structure and evolution.
Coggon J, Nowell G, Pearson D, and Parman S (2009), Application of the 190Pt-186Os isotope system to dating platinum mineralisation and ophiolite formation - An example from the Meratus Mountains, Borneo, Economic Geology, submitted
Cooper S, Plank T, Arculus R, Hauri E, Hall P, and Parman S (2009) Boninites from the modern Tonga arc, Earth and Planetary Science Letters, submitted
Kelley K, Plank T, Newman S, Stolper E, Grove T, Parman S, and Hauri E (2009) Mantle melting as a function of water content beneath the Mariana arc, J Petrology, submitted
Parman S, Grove T, Kelley K, and Plank T (2009) Along-Arc Variations in the Pre-Eruptive H2O Contents of Magmas Inferred from Fractionation Paths, J Petrology, submitted
Nowell GM, Pearson DG, Parman SW & Luguet A (2008). Precise and accurate 186Os/188Os and 187Os/188Os measurements by Multi-Collector Plasma Ionisation Mass Spectrometry (MC-ICP-MS) part II: laser ablation analyses. Chemical Geology 248: 394-426.
Luguet A, Pearson DG, Nowell GM, Dreher ST, Coggon JA, Spetsius ZV and Parman SW (2008). Enriched Pt-Re-Os isotope systematics in plume lavas explained by metasomatic sulfides. Science 319: 453-456.
Parman SW (2007) Helium Isotopic Evidence for Episodic Mantle Melting and Crustal Growth. Nature, 446: 900-903.
Pearson DG, Parman SW, Nowell G. Osmium isotopes show a link between major mantle melting events and continent growth (2007). Nature, 449, 202-205.
Grove TL, Chatterjee N, Parman SW, Medard E. and (2006) The influence of H2O on mantle wedge melting. EPSL 249: 79-89.
Langmuir C, Bezos A, Escrig S, Parman SW (2006). Chemical systematics and hydrous melting of the mantle in Back-Arc Basins. AGU Geophysical Monographs 166: 87-146.
Grove TL, Baker MB, Price RC, Parman SW, Elkins-Tanton LT, Chatterjee N and Muntener O (2005) Magnesian andesite and dacite lavas from Mt. Shasta, northern California: products of fractional crystallization of H2O-rich mantle melts. Contrib. Mineral. Petrol. 148, 542-565.
Parman SW and Grove TL (2005), Komatiites in the plume debate. In Plates, Plumes, and Paradigms (eds. Foulger, G.R., J.H. Natland, D.C. Presnall and D.L. Anderson) GSA Special Publ. 388, 249-256.
Parman SW, Kurz MD, Hart SR and Grove TL (2005) Helium solubility in olivine and implications for high 3He/4He in ocean island basalts. Nature 437, 1140-1143.
My research focuses on the chemical evolution of the Earth, moons and planets. I use a combination of high-pressure, high-temperature experiments to understand the chemical behavior of geomaterials at depth, and use this information to interpret the geochemical rock record.
Have there been peaks in global magma production over time? How does continental crust form? What was its growth rate over time? How did the cratonic mantle roots form? Is mantle convection layered? What is the chemical nature of the core mantle boundary? Did mantle degassing play any role in the dramatic atmospheric changes that occurred from 2.7 to 2.4 Ga? When did plate tectonics begin? How do melts interact with the rocks they pass through on the way to the surface? How hot was the mantle in the Archean? To what extent can we use the Moon, Mars and Venus to help understand the Earth's evolution, and vice-versa?
Ever improving analytical methods are yielding a detailed record of the long-term evolution of the Earth and planets. Understanding and interpreting this record requires an equally detailed knowledge of the chemical behavior of materials. Thus experiments and geochemical analyses are intimately linked. When combined, the two are a powerful tool for probing our planet's past.
NSF-MRI (PI: A Saal, CoPI: S Parman) laser-ablation multicollector ICP-MS.
Salomon (PI: S Parman, CoPI: R Cooper) Atom Probe Tomography of Geological Materials.
Curriculum Development Grant (PI: S Parman) Development of Freshman Seminar on Diamonds.
NERC Did catastrophic melting events dominate the early evolution of the atmosphere, oceans and solid earth? PI: Parman, CoIs: D Pearson, G Nowell, Project Partners: P Kelemen, E Hanski, A Kontinen, H Pritchard
NERC Noble gas partitioning experiments: analyses co-investigators: Funds to analyze noble gas partitioning experiments run at Bayreuth. PI: S Parman, CoIs: S Kelley, C Ballentine
EUFP6 infrastructure access grant (5 weeks of experimental time at the Bayreuth Geoinstitut) Development of methods to measure noble gas partitioning at mantle pressures. PI: S Parman, Project Partners: C McCammon, D Frost
NERC Melting processes in infant subduction zones: HFSE fractionation in boninites PI: S Parman, Project Partner: K Kelley
Nuffield Fellowship - Experimental investigation of noble gas partitioning. PI: S Parman