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  • Baker, M. B., M. M. Hirschmann, M. S. Ghiorso, and E. M. Stolper, Compositions of near-solidus peridotite melts from experiments and thermodynamic calculations, Nature, 375, 308311, 1995.
  • Beattie, P., The generation of uranium series disequilibria by partial melting of spinel peridotite: Constraints from partitioning studies, Earth Planet. Sci. Lett., 117, 379391, 1993a.
  • Beattie, P., Uranium-thorium disequilibria and partitioning on melting of garnet peridotite, Nature, 363, 6365, 1993b.
  • Bourdon, B. P., Mass spectrometric measurements of U-Th disequilibrium in young volcanics: Implications for magmatic processes, Ph.D. thesis, Columbia Univ., New York, 1994.
  • Bourdon, B., A. Zindler, C. Langmuir, and J. Bender, U-Th systematics in the Tamayo Region, East Pacific Rise, Eos Trans. AGU, 74, 632, 1993.
  • Bourdon, B., C. H. Langmuir, and A. Zindler, Ridge-hotspot interaction along the Mid-Atlantic Ridge between 37°30′ and 40°30′N: The U-Th disequilibrium evidence, Earth Planet. Sci. Lett., 142, 175189, 1996a.
  • Bourdon, B., A. Zindler, T. Elliott, and C. H. Langmuir, Constraints on mantle melting at mid-ocean ridges from global U-238-Th-230 disequilibrium data, Nature, 384, 231235, 1996b.
  • Bourdon, B., S. J. Goldstein, D. Bourlès, M. T. Murrell, and C. H. Langmuir, Evidence from 10Be and U series disequilibria on the possible contamination of mid-ocean ridge basalt glasses by sedimentary material, Geochem. Geophys. Geosyst., 1, Paper number 2000GC000047, 2000.
  • Cheng, H., R. L. Edwards, J. Hoff, C. D. Gallup, D. A. Richards, and Y. Asmerom, The half-lives of uranium-234 and thorium-230, Chem. Geol., 169, 1733, 2000.
  • Cohen, A. S., and R. K. O'Nions, Melting rates beneath Hawaii: Evidence from uranium series isotopes in recent lavas, Earth Planet. Sci. Lett., 120, 169175, 1993.
  • Cohen, A. S., R. K. O'Nions, and M. D. Kurz, Chemical and isotopic variations in Mauna Loa tholeiites, Earth Planet. Sci. Lett., 143, 111124, 1996.
  • Condomines, M., P. Morand, and G. Sigvaldason, 230Th-238U disequilibria in historical lavas from Iceland, Earth Planet. Sci. Lett., 55, 393406, 1981.
  • Darbyshire, F. A., K. Priestley, R. S. White, R. Stefansson, G. B. Gudmundsson, and S. S. Jakobsdottir, Crustal structure of central and northern Iceland from analysis of teleseismic receiver functions, Geophys. J. Int., 143, 163184, 2000a.
  • Darbyshire, F. A., R. S. White, and K. F. Priestley, Structure of the crust and uppermost mantle of Iceland from a combined seismic gravity study, Earth Planet. Sci. Lett., 181, 409428, 2000b.
  • Eiler, J. M., J. M. Grönvold, and N. Kitchen, Oxygen isotope evidence for the origin of chemical variations in lavas from Theistareykir volcano in Iceland's northern volcanic zone, Earth Planet. Sci. Lett., 184, 269286, 2000.
  • Elliott, T., Fractionation of U and Th during mantle melting: A reprise, Chem. Geol., 139, 165183, 1997.
  • England, J. G., et al., The Lamont-Doherty Geological Observatory Isolab-54 Isotope Ratio Mass-Spectrometer, Int. J. Mass Spectrom. Ion Processes, 121, 201240, 1992.
  • Goldstein, S. J., M. T. Murrell, and D. R. Janecky, Th and U isotopic systematics of basalts from the Juan de Fuca and Gorda Ridges by mass spectrometry, Earth Planet. Sci. Lett., 96, 134146, 1989.
  • Goldstein, S. J., M. T. Murrell, D. R. Janecky, J. R. Delaney, and D. A. Clague, Geochronology and petrogeneis of MORB form the Juan de Fuca and Gorda ridges by 238U-230Th disequilibrium, Earth Planet. Sci. Lett., 107, 2541, 1991.
  • Goldstein, S. J., M. T. Murrell, and R. W. Williams, 231Pa and 230Th chronology of mid-ocean ridge basalts, Earth Planet. Sci. Lett., 115, 151159, 1993.
  • Goldstein, S. J., M. R. Perfit, R. Batiza, D. J. Fornari, and M. T. Murrell, Off-axis volcanism at the East Pacific Rise detected by uranium-series dating of basalts, Nature, 367, 157159, 1994.
  • Hauri, E., T. P. Wagner, and T. L. Grove, Experimental and natural partitioning of Th, U, Pb and other trace elements between garnet, clinopyroxene and basaltic melts, Chem. Geol., 117, 149166, 1994.
  • Hawkesworth, C. J., S. Blake, P. Evans, R. Hughes, R. MacDonald, L. E. Thomas, S. P. Turner, and G. Zellmer, Time scales of crystal fractionation in magma chambers: Integrating physical, isotopic and geochemical perspectives, J. Petrol., 41, 9911006, 2000.
  • Hemond, C., M. Condomines, S. Fourcade, C. J. Allègre, N. Oskarsson, and M. Javoy, Thorium, strontium and oxygen isotopic geochemistry in recent tholeiites from Iceland: Crustal influence on mantle-derived magmas, Earth Planet. Sci. Lett., 87, 273285, 1988.
  • Hirschmann, M. M., and E. M. Stolper, A possible role for garnet pyroxenite in the origin of the ''garnet signature'' in MORB, Contrib. Miner. Petrol., 124, 185208, 1996.
  • Jakobsson, S. P., Chemistry and distribution of recent basaltic rocks in Iceland, Lithos, 5, 365386, 1972.
  • Johnson, K. T. M., H. J. B. Dick, and N. Shimizu, Melting in the oceanic upper mantle: An ion microprobe study of diopsides in abyssal peridotites, J. Geophys. Res., 95, 26612678, 1990.
  • Jull, M., and D. McKenzie, The effect of deglaciation on mantle melting beneath Iceland, J. Geophys. Res., 101, 21,81521,828, 1996.
  • Jull, M., P. Kelemen, and K. W. W. Sims, Consequences of diffuse and channelled porous melt migration on uranium series disequilibria, Geochim. Cosmochim. Acta, 66, 41334148, 2002.
  • Kelemen, P. B., N. Shimizu, and V. J. M. Salters, Extraction of mid-ocean-ridge basalt from the upwelling mantle by focused flow of melt in dunite channels, Nature, 375, 747753, 1995.
  • Kelemen, P. B., G. Hirth, N. Shimizu, M. Spiegelman, and H. J. B. Dick, A review of melt migration processes in the adiabatically upwelling mantle beneath oceanic spreading ridges, Philos. Trans. R. Soc. London, Ser. A, 355, 283318, 1997.
  • Kinzler, R. J., Melting of mantle peridotite at pressures approaching the spinel to garnet transition, J. Geophys. Res., 102, 865874, 1997.
  • Kinzler, R. J., and T. L. Grove, Primary magmas of mid-ocean ridge basalts, 1: Experiments and methods, J. Geophys. Res., 97, 68856906, 1992a.
  • Kinzler, R. J., and T. L. Grove, Primary magmas of mid-ocean ridge basalts, 2: Applications, J. Geophys. Res., 97, 69076926, 1992b.
  • Klein, E. M., and C. H. Langmuir, Global correlations of ocean ridge basalt chemistry with axial depth and crustal thickness, J. Geophys. Res., 92, 80898115, 1987.
  • Krishnaswami, S., K. K. Turekian, and J. T. Bennett, The behavior of 232Th and the 238U decay chain nuclides during magma formation and volcanism, Geochim. Cosmochim. Acta, 48, 505511, 1984.
  • Landwehr, D., J. Blundy, E. M. Chamorro-Perez, E. Hill, and B. Wood, U-series disequilibria generated by partial melting of spinel lherzolite, Earth Planet. Sci. Lett., 188, 329348, 2001.
  • Langmuir, C. H., E. M. Klein, and T. Plank, Petrological systematics of mid-ocean ridge basalts: Constraints on melt generation beneath ocean ridges, in Mantle Flow and Melt Generation at Mid-Ocean Ridges, Geophys. Monogr. Ser., vol. 71, edited by J. Phipps Morgan, D. K. Blackman, and J. M. Sinton, pp. 183210, AGU, Washington, D. C., 1992.
  • LaTourrette, T. Z., and D. S. Burnett, Experimental determination of U and Th partitioning between clinopyroxene and natural and synthetic basaltic liquid, Earth Planet. Sci. Lett., 110, 227244, 1992.
  • LaTourrette, T. Z., A. K. Kennedy, and G. J. Wasserburg, Thorium-uranium fractionation by garnet: Evidence for a deep source and rapid rise of oceanic basalts, Science, 261, 739742, 1993.
  • Layne, G. D., and K. W. Sims, Secondary ion mass spectrometry for the measurement of 230Th/232Th in volcanic rocks, Int. J. Mass Spectrom., 203, 187198, 2000.
  • Longhi, J., Some phase equilibrium systematics of lherzolite melting: I, Geochem. Geophys. Geosyst., 3(3), 1020, doi:10.1029/2001GC000204, 2002.
  • Lundstrom, C., Models of U-series disequilibria generation in MORB: The effects of two scales of melt porosity, Phys. Earth. Planet. Inter., 121, 189204, 2001.
  • Lundstrom, C. C., J. Gill, Q. Williams, and M. R. Perfit, Mantle melting and basalt extraction by equilibrium porous flow, Science, 270, 19581961, 1995.
  • Lundstrom, C. C., J. Gill, Q. Williams, and B. B. Hanan, Investigating solid mantle upwelling beneath mid-ocean ridges using U-series disequilibria. II. A local study at 33 degrees Mid-Atlantic Ridge, Earth Planet. Sci. Lett., 157, 167181, 1998a.
  • Lundstrom, C. C., Q. Williams, and J. B. Gill, Investigating solid mantle upwelling rates beneath mid-ocean ridges using U-series disequilibria, 1: A global approach, Earth Planet. Sci. Lett., 157, 151165, 1998b.
  • Lundstrom, C. C., D. E. Sampson, M. R. Perfit, J. Gill, and Q. Williams, Insights into mid-ocean ridge basalt petrogenesis: U-series disequilibria from the Siqueiros Transform, Lamont Seamounts, and East Pacific Rise, J. Geophys. Res., 104, 13,03513,048, 1999.
  • Maclennan, J., D. McKenzie, and K. Groenvold, Plume-driven upwelling under central Iceland, Earth Planet. Sci. Lett., 2001, 6782, 2002a.
  • Maclennan, J., M. Jull, D. McKenzie, L. Slater, and K. Grönvold, The link between volcanism and deglaciation in Iceland, Geochem. Geophys. Geosyst., 3(11), 1062, doi:10.1029/2001GC000282, 2002b.
  • McKenzie, D., 230Th-238U disequilibrium and the melting processes beneath ridge axes, Earth Planet. Sci. Lett., 72, 149157, 1985.
  • McKenzie, D., and M. J. Bickle, The volume and composition of melt generated by extension of the lithosphere, J. Petrol., 29, 625679, 1988.
  • Newman, S., R. C. Finkel, and J. D. Macdougall, 230Th-238U disequilibrium systematics in oceanic tholeiites from 21°N on the East Pacific Rise, Earth Planet. Sci. Lett., 65, 1733, 1983.
  • Nicholson, H., M. Condomines, J. G. Fitton, A. E. Fallick, and G. Rogers, Geochemical and isotopic evidence for crustal assimilation beneath Krafla, Iceland, J. Petrol., 32, 10051020, 1991.
  • Peate, D. W., C. J. Hawkesworth, P. W. vanCalsteren, R. N. Taylor, and B. J. Murton, 238U-230Th constraints on mantle upwelling and plume-ridge interaction along the Reykjanes ridge, Earth Planet. Sci. Lett., 187, 259272, 2001.
  • Pertermann, M., and M. M. Hirschmann, Partial melting experiments on a MORB-like pyroxenite between 2 and 3 GPa: Constraints on the presence of pyroxenite in basalt source regions from solidus location and melting rate, J. Geophys. Res., 108(B2), 2125, doi:10.1029/2000JB000118, 2003.
  • Pietruszka, A. J., K. H. Rubin, and M. O. Garcia, 226Ra-230Th-238U disequilibria of historical Kilauea lavas (1790–1982) and the dynamics of mantle melting within the Hawaiian plume, Earth Planet. Sci. Lett., 186, 1531, 2001.
  • Reinitz, I., and K. K. Turekian, 230Th/238U and 226Ra/230Th fractionation in young basaltic glasses from the East Pacific Rise, Earth Planet. Sci. Lett., 94, 199207, 1989.
  • Rubin, K. H., and J. D. MacDougall, Th-Sr isotopic relationships in MORB, Earth Planet. Sci. Lett., 114, 149157, 1992.
  • Salters, V. J. M., and S. R. Hart, The Hafnium Paradox and the role of garnet in the source of mid-ocean-ridge basalts, Nature, 342, 420422, 1989.
  • Salters, V. J. M., and J. Longhi, Trace element partitioning during the initial stages of melting beneath mid-ocean ridges, Earth Planet. Sci. Lett., 166, 1530, 1999.
  • Salters, V. J. M., J. E. Longhi, and M. Bizimis, Near mantle solidus trace element partitioning at pressures up to 3.4 GPa, Geochem. Geophys. Geosyst., 3(7), 1038, doi:10.1029/2001GC000148, 2002.
  • Schilling, J.-G., Fluxes and excess temperatures of mantle plumes inferred from their interaction with migrating mid-ocean ridges, Nature, 352, 397403, 1991.
  • Schilling, J.-G., R. Kingsley, D. Fontignie, R. Poreda, and S. Xue, Dispersion of the Jan Mayen and Iceland mantle plumes in the Arctic: A He-Pb-Nd-Sr isotope tracer study of basalts from the Kolbeinsey, Mohns, and Knipovich Ridges, J. Geophys. Res., 104, 10,54310,569, 1999.
  • Sigmarsson, O., C. Hémond, M. Condomines, S. Fourcade, and N. Oskarsson, Origin of silicic magma in Iceland revealed by Th isotopes, Geology, 19, 621624, 1991.
  • Sigmarsson, O., M. Condomines, and S. Fourcade, A detailed Th, Sr and O isotope study of Hekla: Differentiation processes in an Icelandic volcano, Contrib. Miner. Petrol., 112, 2035, 1992a.
  • Sigmarsson, O., M. Condomines, and S. Fourcade, Mantle and crustal contribution in the genesis of recent basalts from off-rift zones in Iceland: Contraints from Th, Sr and O isotopes, Earth Planet. Sci. Lett., 110, 149162, 1992b.
  • Sims, K. W. W., D. J. Depaolo, M. T. Murrell, W. S. Baldridge, S. J. Goldstein, and D. A. Clague, Mechanisms of magma generation beneath Hawaii and midocean ridges: Uranium/thorium and samarium/neodymium isotopic evidence, Science, 267, 508512, 1995.
  • Sims, K. W. W., D. J. DePaolo, M. T. Murrell, W. S. Baldridge, S. J. Goldstein, D. Clague, and M. Jull, Porosity of the melting zone and variations in the solid mantle upwelling rates beneath Hawaii: Inferences from 238U-230Th-226Ra, and 235U-231Pa disequilibria, Geochim. Cosmochim. Acta, 63, 41194138, 1999.
  • Sims, K. W. W., et al., Chemical and isotopic constraints on the generation and transport of magma beneath the East Pacific Rise, Geochim. Cosmochim. Acta, 66, 34813504, 2002.
  • Slater, L., Melt generation beneath Iceland, Ph.D. thesis, Univ. of Cambridge, Cambridge, UK, 1996.
  • Slater, L., D. McKenzie, K. Gronvold, and N. Shimizu, Melt generation and movement beneath Theistareykir, NE Iceland, J. Petrol., 42, 321354, 2001.
  • Sleep, N. H., Hotspots and mantle plumes: Some phenomenology, J. Geophys. Res., 95, 67156736, 1990.
  • Spiegelman, M., Geochemical consequences of melt transport in 2-D: The sensitivity of trace elements to mantle dynamics, Earth Planet. Sci. Lett., 139, 115132, 1996.
  • Spiegelman, M., UserCalc: A Web-based uranium series calculator for magma migration problems, Geochem. Geophys. Geosyst., 1, Paper number 1999GC000030, 2000.
  • Spiegelman, M., and T. Elliott, Consequences of melt transport for uranium series disequilibrium in young lavas, Earth Planet. Sci. Lett, 118, 120, 1993.
  • Staples, R. K., R. S. White, B. Brandsdottir, W. Menke, P. K. H. Maguire, and J. H. McBride, Faroe-Iceland ridge experiment: 1. Crustal structure of northeastern Iceland, J. Geophys. Res., 102, 78497866, 1997.
  • Stracke, A., V. J. M. Salters, and K. W. W. Sims, Assessing the presence of garnet-pyroxenite in the mantle sources of basalts through combined hafnium-neodymium-thorium isotope systematics, Geochem. Geophys. Geosyst., 1, Paper number 1999GC000013, 1999.
  • Stracke, A., et al., Theistareykir revisited, Geochem. Geophys. Geosyst., 4(2), 8507, doi:10.1029/2001GC000201, 2003.
  • Sturm, M. E., S. J. Goldstein, E. M. Klein, J. A. Karson, and M. T. Murell, Uranium-series age constraints on lavas from the axial valley of the Mid-Atlantic Ridge, MARK area, Earth Planet. Sci. Lett., 181, 6170, 2000.
  • Takahashi, E., Melting of a dry peridotite KLB-1 up to 14 GPa: Implications on the origin of peridotitic upper mantle, J. Geophys. Res., 91, 93679382, 1986.
  • Van Orman, J. A., T. L. Grove, and N. Shimizu, Uranium and thorium diffusion in diopside, Earth Planet. Sci. Lett., 160, 505519, 1998.
  • Williams, R. W., J. B. Gill, and K. W. Bruland, Ra-Th disequilibria: Timescale of carbonatite magma formation at Oldoinyo Lengai volcano, Tanzania, Geochim. Cosmochim. Acta, 50, 12491259, 1986.
  • Wood, B. J., J. D. Blundy, and A. C. Robinson, The role of clinopyroxene in generating U-series disequilibrium during mantle melting, Geochim. Cosmochim. Acta, 63, 16131620, 1999.
  • Zou, H., Trace element fractionation during modal and non-modal dynamic melting and open system melting: A mathematical treatment, Geochim. Cosmochim. Acta, 62, 19371945, 1998.
  • Zou, H., and A. Zindler, Theoretical studies of 238U-230Th-226Ra and 235U-231Pa disequilibria in young lavas produced by mantle melting, Geochim. Cosmochim. Acta, 64, 18091817, 2000.