Professor Simon Turner

Federation Fellow
Isotopic Geochemistry

Contact Details

Office : E5B 215
Phone : 61-(0)2-9850 8363
Fax : 61-(0)2-9850 8943
email :

Dr Simon Turner
Federation Fellow, Department of Earth and Planetary Sciences
Macquarie University NSW, 2109

Simon Turner

Fields of research

I am a geochemist and geochronologist. My research concerns the processes of partial melting and magma formation within the Earth. I approach this through the analysis of elemental concentrations and isotope ratios in silicate rocks and minerals. My particular strength lies in having worked on a broad range of problems and having utilized a large range of techniques. These include orogenic and post-orogenic magma petrogenesis, sediment provenance, crustal growth and erosion, continental flood basalts, potassic lavas associated with high plateau formation, ocean island basalts and island arc lavas. For the last 10 years, my research has largely concentrated on the application of short-lived, U-series isotopes to constraining the time scales of magma formation, transport and differentiation. This relatively new approach requires demanding analytical techniques but has been at the forefront of a revolution in our understanding of the physical processes of magma petrogenesis.

Selected Publications

Publications (not including conference abstracts)

(Figure in brackets at end is number of SCI citations of papers published prior to 2005 as at 4/7/06 - total = 2218; NL = not listed)



[1] Foden, J.D., Turner, S.P., and Morrison, R.S., 1990. The tectonic implications of Delamerian magmatism in South Australia and western Victoria. In: Jago, J.B., and Moore, P.J., (Eds), The evolution of a Late Precambrian-Early Cambrian Palaeozoic rift complex: The Adelaide Geosyncline. Geological Society of Australia Special Publication 16, pp. 465-482. (NL)

[2] Turner, S.P., and Foden, J.D., 1990: The nature of mafic magmatism during the development of the Adelaide Geosyncline and the subsequent Delamerian Orogeny. In: Parker, A.J., Rickwood, P.C. and Tucker, D.H. (eds.) Mafic dykes and emplacement mechanisms, Proc. 2nd Int. Dykes Conf. pp 431-434. (NL)



[3] Turner, S.P., Foden, J.D., and Morrison, R.S., 1992. Derivation of A-type magma by fractionation of basaltic magma and an example from the Padthaway Ridge, South Australia. Lithos 28: 151-171. (103)

[4] Sandiford, M., Foden, J. Zhou, S., and Turner, S., 1992. Granite genesis and the mechanics of convergent orogenic belts with application to the Southern Adelaide Fold Belt. Transactions of the Royal Society of Edinburgh 83: 83-93. (39)

[5] Turner, S.P., and Stuwe, K., 1992. Low pressure corona textures between olivine and plagioclase in gabbros from Black Hill, South Australia. Mineralogical Magazine 56:503-509. (5)

[6] Turner, S.P., Sandiford, M., and Foden, J., 1992. Some geodynamic and compositional constraints on "post-orogenic" magmatism. Geology 20: 931-934. (65)



[7] Turner, S.P., Foden, J.D., Sandiford, M., and Bruce, D., 1993. Sm-Nd isotopic evidence for the provenance of sediments from the Adelaide Foldbelt and southeastern Australia with implications for episodic crustal addition. Geochimica et Cosmochimica Acta 57, 1837-1857. (48)

[8] Turner, S.P., Adams, C., Flöttmann, T., and Foden, J.D., 1993. Geochemical and geochronological constraints on the Glenelg River Complex, western Victoria. Australian Journal of Earth Sciences 40, 275-292. (23)

[9] Turner, S.P., Hawkesworth, C.J., Liu, J., Rogers, N., Kelley, S., and van Calsteren, P., 1993. Volcanism on the Tibetan Plateau as an independent constraint on timing of uplift. Nature 364, 50-54. (111)

[10] Hawkesworth, C., Gallagher, K., Pearson, G., Turner, S., and Van Calsteren, P., 1993. The continental lithosphere: a geochemical perspective. An. Acad. Bras. Ci., 65, 199-225. (8)



[11] Turner, S.P., Sandiford, M., Flöttmann, T. and Foden, J., 1994: Rb-Sr dating of differentiated cleavage from the upper Adelaidean metasediments at Hallett Cove, southern Adelaide Fold Belt. Journal of Structural Geology -16, 1233-1241. (14)

[12] Kelley S.P., Arnaud, N.O. and Turner S.P., 1994. High spatial resolution 40Ar/39Ar investigations using a new ultra-violet laser probe extraction technique. Geochimica et Cosmochimica Acta. 58, 3519-3525. (51)

[13] Turner S., Regelous M., Kelley S., Hawkesworth C. and Mantovani M., 1994. Magmatism and continental break-up in the South Atlantic: High precision 40Ar-39Ar geochronology. Earth and Planetary Science Letters 121, 333-348. (113)

[14] Foden J., Mawby J., Kelley, S., Turner S. and Bruce D., 1994. Metamorphic events in the eastern Arunta Inlier: 2 Nd-Sr-Ar isotopic constraints. Precambrian Research 71, 207-227. (21)

[15] Gibson, S.A., Thompson, R.N., Leonardos, O.H., Turner, S.P., Mitchell, J.G. and Dickin, A.P., 1994. The Serra do Bueno potassic diatreme: a possible hypabyssal equivalent of the ultra-mafic alkaline volcanics in the Late Cretaceous alto Paranaíba Igneous Province, SE Brazil. Mineralogical Magazine, 58, 357-373. (NL)



[16] Turner S. and Hawkesworth C.J. 1995. The nature of the sub-continental mantle: constraints from the major element composition of continental flood basalts. Chemical Geology, 120, 295-314. (78)

[17] Hawkesworth, C., Turner, S., Gallagher, K., Hunter, A., Bradshaw, T. and Rogers, N., 1995. Calc-alkaline magmatism, lithospheric thinning and extension in the Basin and Range. Journal of Geophysical Research, 100, 10271-10286. (54)

[18] Turner, S.P., Sandiford, M., Flöttmann, T. and Foden, J., 1994. Rb-Sr dating of differentiated cleavage from the upper Adelaidean metasediments at Hallett Cove, southern Adelaide Fold Belt: Reply. Journal of Structural Geology -17, 1801-1803. (NL)



[19] Turner, S., Arnaud, N., Liu, J., Harris, N., Hawkesworth, J., Kelley, S., Rogers, N., van Calsteren, P. and Deng, W., 1996. Post-collision, shoshonitic volcanism on the Tibetan Plateau: implications for convective thinning of the lithosphere and the source of ocean island basalts. Journal of Petrology, 37, 45-71. (175)

[20] Turner, S.P., 1996. Petrogenesis of the late-Delamerian gabbroic complex at Black Hill, South Australia: implications for convective thinning of the lithospheric mantle. Mineralogy and Petrology , 56, 51-98. (16)

[21] Turner, S.P., and Foden, J.D., 1996. Magma mingling in late-Delamerian A-type granites at Mannum, South Australia. Mineralogy and Petrology , 56, 147-169. (7)

[22] Turner, S., Hawkesworth, C., Gallagher, K., Stewart, K., Peate, D. and Mantovani, M., 1996. Mantle plumes, flood basalts, and thermal models for melt generation beneath continents: assessment of a conductive heating model and application to the Paraná. Journal of Geophysical Research, 101, 11503-11518. (44)

[23] Garland, F., Turner, S. and Hawkesworth, C., 1996: Shifts in the source of the Paraná basalts through time. Lithos , 37, 223-243. (26)

[24] Turner, S., Hawkesworth, C., Macdonald, R., Black, S. and van Calsteren, P., 1996. U-series isotopes and destructive plate margin magma genesis in the Lesser Antilles. Earth and Planetary Science Letters , 142, 191-207. (72)

[25] Turner, S., Kelley, S., VandenBerg, A., Foden, J., Sandiford, M. and Flöttmann, T., 1996. Source of the Lachlan Fold Belt flysch linked to convective removal of the lithospheric mantle and rapid exhumation of the Delamerian-Ross Fold Belt. Geology, 24, 941-944. (46)

[26] Stewart, K., Turner, S., Kelley, S., Hawkesworth, C., Kirstein, L. and Mantovani, M., 1996. 3-D 40Ar-39Ar geochronology in the Paraná continental flood basalt province. Earth and Planetary Science Letters, 143, 95-109. (61)



[27] Hawkesworth, C.J., Turner, S.P., McDermott, F., Peate, D.W. and van Calsteren, P., 1997. U-Th isotopes in arc magmas: implications for element transfer from the subducted crust. Science, 276, 551-555. (92)

[28] Hawkesworth, C., Turner, S., Peate, D., McDermott, F. and van Calsteren, P., 1997. Elemental U and Th variations in island arc rocks: implications for U-series isotopes. Chemical Geology Special Volume, 139, 207-222. (41)

[29] Turner, S., Hawkesworth, C., Rogers, N. and King, P., 1997. U-Th isotope disequilibria and ocean island basalt generation in the Azores. Chemical Geology Special Volume, 139, 145-164. (32)

[30] Turner, S., 1997. Scientists share knowledge about island arc magmatism. Conference Report, EOS, 78, 333.

[31] Turner, S. and Hawkesworth, C., 1997. Constraints on flux rates and mantle dynamics beneath island arcs from Tonga-Kermadec lava geochemistry. Nature, 389, 568-573. (49)

[32] Turner, S., Hawkesworth, C., Rogers, N., Bartlett, J., Worthington, T., Hergt, J., Pearce, J., and Smith, I., 1997. 238U-230Th disequilibria, magma petrogenesis and flux rates beneath the depleted Tonga-Kermadec island arc. Geochimica et Cosmochimic Acta, 61, 4855-4884. (52)



[33] Heath, E., Turner, S.P., Macdonald, R., Hawkesworth, C.J., and van Calsteren, P., 1998. Long magma residence times at an island arc volcano (Soufriere, St. Vincent) in the Lesser Antilles: evidence from 238U-230Th isochron dating. Earth and Planetary Science Letters 160, 49-63. (34)

[34] Turner, S., and Hawkesworth, C., 1998. Using geochemistry to map mantle flow in the Lau Basin. Geology 26, 1019-1022. (31)

[35] Turner, S., McDermott, F., Hawkesworth, C., and Kepzhinskas, P., 1998. A U-series study of Kamchatka and the Aleutians: constraints on source composition and melting conditions. Contributions to Mineralogy and Petrology 133, 217-234. (35)

[36] Nowell, G.M., Pearson, D.G., Kempton, P.D., Irving, A.J., and Turner, S., 1998. A Hf isotope study of lamproites: implications for their origins and relationship to kimberlites. Proc. 7th Int. Kimberlite Conference, South Africa, 637-639. (NL)



[37] Hawkesworth, C., Pearson, D.G., and Turner, S., 1999. Chemical and temporal variations in the Earth's lithosphere. Phil. Trans. R. Soc. Lond. 357, 647-669. (3)

[38] Turner, S.P., Platt, J.P., George, R.M.M., Kelley, S.P., Pearson, D.G., and Nowell, G.M., 1999. Magmatism associated with orogenic collapse of the Betic-Alboran Domain, SE Spain. Journal of Petrology 40, 1011-1036. (58)

[39] Peate, D.W., Hawkesworth, C.J., Mantovani, M.S.M., Rogers, N.W., and Turner, S.P., 1999. Petrogenesis and stratigraphy of the high-Ti/Y Urubici magma type in the Paraná flood basalt province and implications for the nature of 'Dupal'-type mantle in the South Atlantic region. J. Petrol., 40, 451-473. (24)

[40] Hawkesworth, C., Kelley, S., Turner, S., Le Roex, A., and Storey, B., 1999. Mantle processes during Gondwana break-up and dispersal. J. Afr. Earth Sci., 28, 239-261. (33)

[41] Turner, S., Peate, D., Hawkesworth, C., and Mantovani, M., 1999. Chemical stratigraphy of the Paraná basalt succession in western Uruguay: further evidence for the diachronous nature of the Paraná magma types. J. Geodynam., 28, 459-469. (2)

[42] Turner, S., Kirstein, L., Hawkesworth, C., Peate, D., Hallinan, S., and Mantovani, M., 1999. Petrogenesis of an 800 metre lava succession in eastern Uruguay: insights into magma chamber processes beneath the Paraná flood basalt provine. J. Geodynam., 28, 471-487. (3)

[43] Zellmer, G., Blake, S., Vance, D., Hawkesworth, C., and Turner, S., 1999. Short plagioclase residence times at two island arc volcanoes (Kameni islands, Santorini, and Soufriere, St. Vincent) determined by Sr diffusion systematics. Contrib. Mineral. Petrol. 136, 345-357. (33)

[44] Turner, S.P., Peate, D.W., Hawkesworth, C.J., Eggins, S.M., and Crawford, A.J., 1999. Two mantle domains and the time scales of fluid transfer beneath the Vanuatu arc. Geology 27, 963-966. (13)

[45] Thomas, L.T., Hawkesworth, C.J., van Calsteren, P., Turner, S.P., and Rogers, N.W., 1999. Melt generation beneath ocean islands: a U-Th-Ra isotope study from Lanzarote in the Canary Islands. Geochimical et Cosmochimica Acta 63, 4081-4099. (13)

[46] Bourdon, B., Turner, S., and Allègre, C., 1999. Melting dynamics beneath the Tonga-Kermadec island arc inferred from 231Pa-235U systematics. Science 286, 2491-2493. (22)



[47] Turner, S., Blundy, J., Wood, B., and Hole, M., 2000. Large 230Th-excesses in basalts produced by partial melting of spinel lherzolite. Chem. Geol. 162, 127-136. (9)

[48] Zellmer, G., Turner, S., and Hawkesworth, C., 2000. Timescales of destructive plate margin magmatism: new insights from Santorini, Aegean volcanic arc. Earth Planet. Sci. Lett. 174, 265-281. (23)

[49] Turner, S.P., George, R.M.M., Evans, P.J., Hawkesworth, C.J., and Zellmer, G.F., 2000. Time scales of magma formation, ascent and storage beneath subduction zone volcanoes. Phil. Trans. R. Soc. Lond. 358, 1443-1464. (18)

[50] Schaefer, B.F., Turner, S.P., Rogers, N.W., Hawkesworth, C.J., Williams, H., Pearson, D.G., and Nowell, G.M., 2000. Re-Os isotope characteristics of post-orogenic volcanics: implications for the nature of non-cratonic lithospheric mantle and its contribution to basaltic magmas. Geology 28, 563-566. (7)

[51] Hawkesworth, C., Blake, S., Evans, P., Hughes, R., Macdonald, R., Thomas, L., Turner, S., and Zellmer, G., 2000. The time scales of crystal fractionation in magma chambers - integrating physical, isotopic and geochemical perspectives. Journal of Petrology 41, 991-1006. (50)

[52] Turner, S., Bourdon, B., Hawkesworth, C., and Evans, P., 2000. 226Ra-230Th evidence for multiple dehydration events, rapid melt ascent and the time scales of differentiation beneath the Tonga-Kermadec island arc. Earth and Planetary Science Letters 179, 581-593. (40)

[53] Hawkesworth, C.J., Gallagher, K., Kirstein, L., Mantovani, M.S.M., Peate, D.W., and Turner, S.P., 2000. Tectonic controls on magmatism associated with continental break-up: an example from the Paraná-Etendeka province. Earth and Planetary Science Letters 179, 335-349. (9)

[54] Kirstein, L., Peate, D.W., Hawkesworth, C.J., Turner, S.P., Harris, C., and Mantovani, M.S.M., 2000. Early Cretaceous Basaltic and Rhyolitic Magmatism in Southern Uruguay Associated with the Opening of the South Atlantic. Journal of Petrology 41, 1413-1438. (15)



[55] Turner, S., van Calsteren, P., Vigier, N., and Thomas, L., 2001. Determination of thorium and uranium isotope ratios in low-concentration geological materials using a fixed multicollector ICP-MS. Journal of Analytical Atomic Spectroscopy 16, 612-615. (24)

[56] Williams, H.M., Turner, S.P., Kelley, S.P., and Harris, N.B.W., 2001. Age and composition of dykes in Southern Tibet: new constraints on the timing of east-west extension and its relationship to post-collision volcanism. Geology 29, 339-342. (36)

[57] Turner, S., Evans, P., and Hawkesworth, C., 2001. Ultra-fast source-to-surface movement of melt at island arcs from 226Ra-230Th systematics. Science 292, 1363-1366. (44)

[58] Hawkesworth, C., Turner, S., Blake, S., and Thomas, L., 2001. Magma differentiation rates: combining isotopic constraints and thermal models. EOS 82, 261-265.

[59] Kirstein, L.A., Kelley, S., Hawkesworth, C., Turner, S., Mantovani, M., and Wijbrans, J., 2001. Protracted felsic magmatic activity associated with the opening of the South Atlantic. J. Geol. Soc. Lond. 158, 583-592. (8)

[60] Turner, S., and Foden, J., 2001. U-Th-Ra disequilibria, Sr-Nd-Pb isotope and trace element variations in Sunda arc lavas: predominance of a subducted sediment component. Contributions to Mineralogy and Petrology 142, 43-57. (28)

[61] Vigier, N., Bourdon, B., Turner, S., and Allègre, C., 2001. Erosion timescales derived from U-decay series measurements in rivers. Earth and Planetary Science Letters 193, 549-563. (16)



[62] Foden, J., Song, S.H., Turner, S., Elburg, M., Smith, P.B., Van der Steldt, B., and Van Penglis, D., 2002. Geochemical evolution of lithospheric mantle beneath S.E. South Australia. Chemical Geology 182, 663-695. (10)

[63] Foden, J.D., Elburg, M.A., Turner, S.P., Sandiford, M., O’Callaghan, J., and Mitchell, S., 2002. Granite production in the Delamerian orogen, South Australia. Journal of the Geological Society London 159, 557-576. (7)

[64] Schaefer, B., Turner, S., Parkinson, I., Rogers, N., and Hawkesworth, C., 2002. Recycled Archaean oceanic mantle lithosphere in the Azores plume. Nature 420, 324-327. (9)

[65] Turner, S. P., 2002. On the time scales of magmatism at island arc volcanoes. Philosophical Transactions of the Royal Society of London, Series A, 360, 2853-2871. (4)



[66] Turner, S., Foden, J., George, R., Evans, P., Varne, R., Elburg, M., and Jenner, G., 2003. Rates and processes of potassic magma generation at Sangeang Api volcano, east Sunda arc, Indonesia. Journal of Petrology, 44, 491-515. (16)

[67] George, R., Turner, S., Hawkesworth, C., Morris, J., Nye, C., Ryan, J., and Zheng, S.-H., 2003. Melting processes and fluid and sediment transport rates along the Alaska-Aleutian arc from an integrated U-Th-Ra-Be isotope study. Journal of Geophysical Research, 108 (B5), 2252, doi:10.1029/2002JB001916. (5)

[68] Bourdon, B., Turner, S., and Dosseto, A., 2003. Dehydration and partial melting in subduction zones: constraints from U-series disequilibria. Journal of Geophysical Research, 108 (B6), 2291, doi: 10.1029/2002JB001839. (4)

[69] Turner, S., Bourdon, B., and Gill, J., 2003. Insights into magma genesis at convergent margins from U-series isotopes. In: Bourdon, B., Henderson, G., Lundstrom, C., Turner, S., (eds) Uranium series geochemistry. Reviews in Mineralogy and Geochemistry, 52, 255-315. (17)

[70] Bourdon, B., Turner, S., Henderson, G., and Lundstrom, C., 2003. Introduction to U-series geochemistry. In: Bourdon, B., Henderson, G., Lundstrom, C., Turner, S., (eds) Uranium series geochemistry. Reviews in Mineralogy and Geochemistry, 52, 1-21. (14)

[71] Bourdon, B., Henderson, G., Lundstrom, C., Turner, S., 2003. Uranium series geochemistry. Reviews in Mineralogy and Geochemistry, 52, 656 pp. (NL)

[72] Hawkesworth, C., George, R., Turner, S., and Zellmer, G., 2003. Estimating the time scales of magmatic processes, in Melt Inclusions in volcanic systems: Methods, applications and Problems (De Vivo B. and Bodnar J. R., Eds). Series "Developments in Volcanology", Elsevier Science, Amsterdam, pp. 23-44. (NL)

[73] Turner, S., George, R., Jerram, D., Carpenter, N., and Hawkesworth, C., 2003. Case studies of plagioclase growth and residence times in island arc lavas from Tonga and the Lesser Antilles and Tonga, and a model to reconcile discordant age information. Earth and Planetary Science Letters, 214, 279-294. (12)



[74] George, R., Turner, S., Hawkesworth, C., Nye, C., Bacon, C., Stelling, P., and Dreher, S., 2004. Chemical versus temporal controls on the evolution of tholeiitic and calc-alkaline magmas at two volcanoes in the Aleutian arc. Journal of Petrology, 45, 203-219. (6)

[75] Hawkesworth, C., George, R., Turner, S., and Zellmer, G., 2004. Timescales of magmatic processes. Earth and Planetary Science Letters (Frontiers) 218, 1-16. (15)

[76] Williams, H.M., Turner, S.P., Pearce, J.A., Kelley, S.P., and Harris, N.B.W., 2004. Nature of the source region for post-collisional, potassic magmatism in southern and northern Tibet from geochemical variations and inverse trace element modeling. Journal of Petrology, 45, 555-607. (15)

[77] Regelous, M., Turner, S.P., Elliott, T.R., Rostami, K., and Hawkesworth, C.J., 2004. Measurement of femotgram quantities of Pa in rock samples by multicollector inductively coupled plasma mass spectrometry. Analytical Chemistry 76, 3584-3589. (9)

[78] Berlo, K., Turner, S., Blundy, J., and Hawkesworth, C., 2004. The extent of U-series disequilibria produced during partial melting of the lower crust with implications for the formation of the Mount St. Helens dacites. Contributions to Mineralogy and Petrology 148, 122-130. (3)

[79] Turner, S., Black, S., and Berlo, K., 2004. 210Pb-226Ra and 232Th-228Ra systematics in young arc lavas: implications for magma degassing and ascent rates. Earth and Planetary Science Letters, 227, 1-16. (4)

[80] Haines, P.W., Turner, S.P., Kelley, S.P., Wartho, J.-A., and Sherlock, S., 2004. 40Ar/39Ar dating of detrital muscovite from the Delamerian Orogen, South Australia: implications for provenance, tectonics and crustal evolution. Earth and Planetary Science Letters, 227, 297-311. (2)

[81] Berlo, K., Blundy, J., Turner, S., Cashman, K., Hawkesworth, C., and Black, S., 2004. Geochemical precursors to volcanic activity at Mount St. Helens, U.S.A. Science 306, 1167-1169. (5)

[82] George, R., Reagan, M., Turner, S., Gill, J., and Bourdon, B., 2004. Comment on "Steady-state 226Ra/230Th disequilibrium in mantle minerals: Implications for melt transport rates in island arcs" by M.D. Feineman and D.J. DePaolo [Earth Planet. Sci. Lett. 215 (2003) 339-355]. Earth and Planetary Science Letters 228, 563-567. (2)



[83] Zellmer, G.F., Annen, C., Charlier, B.L.A., George, R.M.M., Turner, S.P., and Hawkesworth, C.J., 2005. Magma evolution and ascent at volcanic arcs: constraining petrogenetic processes through rates and chronologies. Journal of Volcanology and Geothermal Research, 140, 171-191.

[84] George, R., Turner, S., Morris, J., Plank, T., Hawkesworth, C., and Ryan, J., 2005. Pressure-temperature-time paths of sediment recycling beneath the Tonga-Kermadec arc. Earth and Planetary Science Letters, 233, 195-211.

[85] Vigier, N., Bourdon, B., Lewin, E., Dupre, B., Turner, S., van Calsteren, P., and Allègre, C., 2005. Mobility of U-series nuclides during basalt weathering: an example from the Deccan Traps (India). Chemical Geology 219, 69-91.

[86] Bourdon, B., Turner, S., and Ribe, N.M., 2005. Partial melting and upwelling rates beneath the Azores from a U-series isotope perspective. Earth and Planetary Science Letters 239, 42-56.

[87] McDermott, F., Delfin, F.G., Defant, M.J., Turner, S., and Maury, R., 2005. The petrogenesis of magmas from Mt. Bulusan and Mayon in the Bicol arc, the Philippines. Contributions to Mineralogy and Petrology 150, 652-670.

[88] Turner, S.P., 2005. Some remarks on magmatic processes beneath island arc volcanoes. Advances in Science, Earth Sciences. Imperial College Press pp. 131-155.



[89] Turner, S., Regelous, M., Hawkesworth, C., and Rostami, K., 2006. Partial melting processes above subducting plates: constraints from 231Pa-235U disequilibria. Geochimica et Cosmochimica Acta 70, 480-503.

[90] Garrison, J., Davidson, J., Reid, M., and Turner, S., 2006. Source versus differentiation controls on U-series disequilibria: insights from Cotopaxi volcano, Ecuador. Earth and Planetary Science Letters 244, 548-565.

[91] Dosetto, A., Turner, S., and Douglas, G.B., 2006. Uranium-series isotopes in colloids and sediments: time scale for sediment production and transport in the Murray-Darling river system. Earth and Planetary Science Letters 246, 418-431.

[92] Toothill, J., Williams, C.A., Macdonald, R., Turner, S.P., Hawkesworth, C.J., Rogers, N.W., and Jerram, D., 2006. Petrology and geochemistry of St Kitts, Lesser Antilles volcanic group. Journal of Petrology (in press).

[93] Zellmer, G.F., and Turner, S.P., 2006. Mafic enclaves in intermediate arc lavas: insights into processes and timescales from U-Th disequilibria. Journal of Volcanology and Geothermal Research (in press).

[94] Berlo, K., Turner, S., Blundy, J., and Hawkesworth, C., 2006. Comment on: 226Ra/230Th excess generated in the lower crust: implications for magma transport and storage time scales. Geology (in press).

[95] Berlo, K., Turner, S., Black, S., Hawkesworth, C., and Blundy, J., 2006. Tracing magma degassing prior to eruption using (210Pb/226Ra) disequilibria in volcanic deposits of the 1980-1986 eruptions of Mount St Helens. Earth and Planetary Science Letters (in revision).

[96] Petford, N., and Turner, S., 2006. Transitional melt flow in downwelling arc mantle. Geophysical Research Letters (in revision).

[97] Berlo, K., Blundy, J., Turner, S., and Hawkesworth, C., 2006. A chemical hiatus in the plagiolcase archive at Mount St Helens: nucleation controlled differentiation. Contributions to Mineralogy and Petrology (in revision).

[98] Turner, S., Tonarini, S., Bindeman, I., and Schaefer, B., 2006. Boron and oxygen isotope evidence for recycling of subducted components through the Earths mantle since 2.5 Ga. Nature (submitted).

[99] Bourdon, B., Ribe, N.M., Stracke, A., Saal, A.E., and Turner, S.P., 2006. Dynamics of mantle plumes: insights from U-series geochemistry. Nature (submitted).

[100]Haines, P.W., Turner, S.P., Foden, J.D., and Jago, J.B., 2006. Implications of geochemical and Nd isotope data for stratigraphy and provenance of the Cambrian Kanmantoo Group, South Australia. Australian Journal of Earth Sciences (submitted).

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