Oregon State University


Robert Duncan

Robert Duncan photo
Professor Emeritus

Discipline: Geology and Geophysics
Office: Burt 248
Phone: 541-737-5213
Fax: 541-737-2064
Email: rduncan@coas.oregonstate.edu

Research Interests

Geochronology and petrogenesis of ocean floor and oceanic island basalts applied to modeling crustal movements in the ocean basins; geochemistry of oceanic basalts to map upper mantle heterogeneities; hydrothermal alteration of midocean ridge basalts; the origin, composition, timing and environmental effects of large igneous processes.

Current Research

K/Ar and 40Ar/39Ar geochronology of ocean floor and ocean island basalts, applied to modeling crustal movements and the evolution of ocean basins; geochronology and geochemistry of episodic volcanism in the Coast Ranges of Oregon and Washington, and the formation of the continental border of the Pacific Northwest; geochronology applied to the evolution of the Western Cascades volcanic arc; geochronology of alteration minerals in seafloor basalts to date the longevity of hydrothermal circulation; the origin of large igneous provinces on continents and in ocean basins.


A. B., Princeton University (Geology), Magna cum Laude, 1971
M. S., Stanford University (Geophysics), 1972
Ph.D., Australian National University, 1976


Duncan, R.A. and M.A. Richards, 1991. Hotspots, mantle plumes, flood basalts, and true polar wander. Rev. Geophysics, 29, 31-50.

Gallahan, W.E. and R.A. Duncan, 1994. Spatial and temporal variability in crystallization of celadonites within the Troodos ophiolite, Cyprus: Implications for low-temperature alteration of the oceanic crust. J. Geophys. Res., 99, 3147-3161.

Duncan, R.A., M.R. Fisk, W.M. White, and R.L. Nielsen, 1995. Tahiti: anatomy of a French Polynesian volcano. J. Geophys. Res., 99, 24,341-24.357.

Sinton, C.W. and Duncan, R.A., 1997. Ocean plateau volcanism and global ocean anoxia: Hydrothermal links at the Cenomanian-Turonian boundary. Econ. Geol., 92: 836-842.

Keller, R.A., Fisk, M.R. and Duncan, R.A., 1997. 16 m.y. of hotspot and nonhotspot volcanism on the Patton-Murray seamount platform, Gulf of Alaska. Geology, 25: 511-514.

Duncan, R.A., Hooper, P.R., Rehacek, J., Marsh, J.S. and Duncan, A.R., 1997. The timing and duration of the Karoo igneous event, southern Gondwana. J. Geophys. Res., 102: 18,127-18,138.

Tegner, C., Duncan, R.A., Bernstein, S., Brooks, C.K., Bird, D.K. and Storey, M., 1998. 40Ar-39Ar geochronology of Tertiary mafic intrusions along the East Greenland rifted margin: Relation to flood basalts and the Iceland hotspot track. Earth Planet. Sci. Lett., 156: 75-88.

Duncan, R.A. and Helgason, J., 1998. Precise dating of the Holmatindur cooling event in eastern Iceland: Evidence for mid-Miocene bipolar glaciation. J. Geophys. Es., 103: 12,397-12,404.


  • Larsen, H.C., Duncan, R.A., Allan, J.F., Brooks, K. (Eds), 1999. Proceedings of the Ocean Drilling Program, Scientific Results of Leg 163, Ocean Drilling Program (College Station, TX), 179pp.
  • Tarduno, J.A., Duncan, R.A., Scholl, D., et al., 2002. Proceedings of the Ocean Drilling Program, Initial Reports of Leg 197, Ocean Drilling Program (College Station, TX).

Peer Reviewed Papers

  1. Sinton, C.W. and Duncan, R.A., 1998. 40Ar-39Ar ages of lavas from the southeast Greenland margin, ODP Leg 152, and the Rockall Plateau, DSDP Leg 81. In, Larsen, H.C. et al. (eds), Proc. ODP, Sci. Results, v. 152, Ocean Drilling Program (College Station, TX) pp. 387-402.
  2. Kristjansson, L., Duncan, R.A. and Gudmundsson, A., 1998. Stratigraphy, paleomagnetism and age of volcanics in the upper regions of Thjorsardalur valley, central southern Iceland. Boreas, 27: 1-13.
  3. Tegner, C., Duncan, R.A., Bernstein, S., Brooks, C.K., Bird, D.K. and Storey, M., 1998. 40Ar-39Ar geochronology of Tertiary mafic intrusions along the East Greenland rifted margin: Relation to flood basalts and the Iceland hotspot track. Earth Planet. Sci. Lett., 156: 75-88.
  4. Sinton, C.W., Hitchen, K. and Duncan, R.A., 1998. 40Ar-39Ar geochronology of silicic and basic volcanic rocks on the margins of the North Atlantic. Geol. Mag., 135: 161-170.
  5. Sinton, C.W., Duncan, R.A., Storey, M., Lewis, J., Estrada, J.J. and Klaver, G., 1998. An oceanic plateau at the core of the Caribbean plate. Earth Planet. Sci. Lett., 155: 221-235.
  6. Duncan, R.A. and Helgason, J., 1998. Precise dating of the Holmatindur cooling event in eastern Iceland: Evidence for mid-Miocene bipolar glaciation. J. Geophys. Res., 103: 12,397-12,404.
  7. Chandrasekharam, D., Mahoney, J.J., Sheth, H.C. and Duncan, R.A., 1999. Elemental and Nd-Sr-Pb isotope geochemistry of flows and dikes from the Tapi rift, Deccan flood basalt province, India. J. Volcanol. Geotherm. Res., 93: 111-123.
  8. Tegner, C. and Duncan, R.A., 1999. 40Ar-39Ar chronology for the volcanic history of the southeast Greenland rifted margin. In, Larsen, H.C., Duncan, R.A., Allan, J.F., Brooks, K. (eds) Proc. ODP, Sci. Results, vol. 163 (Ocean Drilling Program, College Station, TX), pp. 53-62.
  9. Reiners, P.W., Hammond, P.E., McKenna, J.M. and Duncan, R.A., 2000. Young basalts of the central Washington Cascades, flux melting of the mantle, and trace element signatures of primary arc magmas. Contrib. Mineral. Petrol., 138: 249-264.
  10. Sinton, C.W., Sigurdsson, H. and Duncan, R.A., 2000. Geochronology and petrology of the igneous basement at the Lower Nicaraguan Rise, Site 1001. In, Leckie, R.M., Sigurdsson, H., Acton, G.D., Draper, G. (eds), Proc. ODP, Sci. Results, vol. 165 (Ocean Drilling Program, College Station, TX), pp. 233-236.
  11. Guillou, H., Carracedo, J.C. and Duncan, R.A., 2000. Radiometric dating and magnetostratigraphy of Brunhes and Matuyama lava sequences from La Palma Island. J. Volcanol. Geotherm. Res., 106: 175-194.
  12. Helgason, J. and Duncan, R.A., 2000. Glacial-interglacial history of the Skaftafell region, SE Iceland, 0-5 Ma. Geology, 29: 179-182.
  13. Tejada, M.L.G., Mahoney, J.J., Neal, C.R., Duncan, R.A. and Petterson, M.G., 2002. Basement geochemistry and geochronology of central Malaita, Solomon Islands, with implications for the origin and evolution of the Ontong Java Plateau. J. Petrology, 43: 449-484.
  14. Mauffret, A., Vila, J.-M., Hallot, E., Mercier de Lepinay, B. and Duncan, R.A., 2001. Diving submersible survey of the central Caribbean large igneous province reveals the internal structure and composition of an oceanic plateau. Mar. Geophys. Res., 22: 17-45.
  15. Revillon, S., Hallot, E., Arndt, N.T., Chauvel, C. and Duncan, R.A., 2000. A complex history for the Caribbean plateau: Petrology, geochemistry and geochronology of the Beata Ridge, south Hispaniola. J. Geol., 108: 641-661.
  16. Jones, D.L., Duncan, R.A., Briden, J.C. and Randall, D.E., 2001. The age of the Batoka basalts, northern Zimbabwe, and the duration of Karoo Large Igneous Province magmatism. Geochem. Geophys. Geosys., 2: paper no. 2000GC000110.
  17. Coulson, I.M., Villeneuve, M.E., Dipple, G.M., Duncan, R.A., Russell, J.K. and Mortensen, J.K., 2002. Time-scales of assembly and thermal history of a composite felsic pluton: Constraints from the Emerald Lake area, northern Canadian Cordillera, Yukon. J. Volcanol. Geotherm. Res., 114: 331-356.
  18. Hansen, H., Petersen, A.K., Duncan, R.A., Bird, D.K., Brooks, C.K., Fawcett, J.J., Gittins, J, Gorton, M, and O’Day, P., 2002. Volcanic stratigraphy of the southern Prinsen af Wales Bjerge region, East Greenland. In, Jolley, D.W. and Bell, B.R. (eds) The North Atlantic Igneous Province: Stratigraphy, Tectonic, Volcanic and Magmatic Processes. Geol. Soc., London, Spec. Publ. 197: 183-218.
  19. Stakes, D.S., Trehu, A.M., Goffredi, S.K., Naehr, T.H., and Duncan, R.A., 2002. Mass wasting, methane venting, and biological communities on the Mendocino transform fault. Geology, 30: 407-410.
  20. Duncan, R.A., 2002. A time frame for construction of the Kerguelen Plateau and Broken Ridge. Spec. Issue on Kerguelen Plateau Drilling, J. Petrology, 43: 1109-1119.
  21. Coffin, M.F., Pringle, M.S., Duncan, R.A., Gladczenko, T.P., Storey, M., Muller, R.D., and Gahagan, L.A., 2002. Kerguelen hotspot magma output since 130 Ma., Spec. Issue on Kerguelen Plateau Drilling, J. Petrology, 43: 1121-1139.
  22. Mahoney, J.J., Duncan, R.A., Khan, W., Gnos, E., and McCormick, G.R., 2002. Cretaceous volcanic rocks of the south Tethyan Suture Zone, Pakistan: Implications for the Reunion hotspot and Deccan Traps. Earth Planet. Sci. Lett., 203: 295-310.
  23. Kerr, A.C., Tarney, J., Kempton, P.D., Spadea, P., Nivia, A., Marriner, G.F., and Duncan, R.A., 2002. Pervasive mantle plume head heterogeneity: Evidence from the late Cretaceous Caribbean-Colombian oceanic plateau. J. Geophys. Res., 107: 10.1029/2001JB000790.
  24. Bohaty, S.M., Wise, S.W., Jr., Duncan, R.A., Moore, C.L., and Wallace, P.J., 2003. Neogene diatom biostratography, tephra stratigraphy and chronology of ODP Hole 1138A, Kerguelen Plateau. Paleoceanography. In, Frey, F.A., Coffin, M.F., Wallace, P.J. and Quilty, P.G. (eds.), Proc. ODP, Sci. Results, v. 183, Ocean Drilling Program (College Station, TX), 1-53.
  25. Duncan, R.A., 2002. Thermal and compositional effects of ocean plateau formation: Consequences for Cretaceous ocean anoxic events. In, Bralower et al. (eds) Workshop on Cretaceous Climate and Ocean Dynamics, Florissant, CO, p. 18.
  26. Snow, L.J. and Duncan, R.A., 2002. Hydrothermal links between ocean plateau formation and global anoxia. In, Bralower et al. (eds) Workshop on Cretaceous Climate and Ocean Dynamics, Florissant, CO, p. 74.
  27. Peate, D.W., Baker, J.A., Blichert-Toft, J., Hilton, D.R., Storey, M., Kent, A.J.R., Brooks, C.K., Hansen, H., Pedersen, A.K., and Duncan, R.A., 2002. The Prinsen af Wales Bjerge Formation lavas, East Greenland: The transition from tholeiitic to alkalic magmatism during Palaeogene continental break-up. J.Petrology, 44: 279-304.
  28. Trehu, A.M., Stakes, D.S., Bartlett, C.D., Chevallier, J., Duncan, R.A., Goffredi, S.K., Potter, S.M., and Salamy, K.A., 2003. Seismic and seafloor evidence for free gas, gas hydrates, and fluid seeps on the transform margin offshore Cape Mendocino. J. Geophys. Res., 108: Art.No. 2263/2001JB001679.
  29. Koppers, A.A.P., Staudigel, H. and Duncan, R.A., 2003. High resolution 40Ar/39Ar dating of the oldest oceanic basement in the western Pacific basin. Geochem. Geophys. Geosys. 4: Art.No. 8914.
  30. Retallack, G.J., Orr, W.N., Prothero, D.R., Duncan, R.A., and Ambers, C.P., 2003. Eocene-Oligocene extinction and paleoclimate change near Eugene, Oregon. Geol. Soc. Amer. Bull. 116: 817-839.
  31. Tarduno, J.A., Duncan, R.A., Scholl, D.W., Cottrell, R.D., Steinberger, B., Thordarson, T., Kerr, B.C., Neal, C.R., Frey, F.A., Torii, M., and Carvallo, C., 2003. The Emperor seamounts: Southward motion of the Hawaiian hotspot plume in Earth’s mantle. Science, 301: 1064-1069.
  32. Duncan, R.A., Tarduno, J., Scholl, D. and the leg 197 Scientific Party, 2003. ODP Leg 197: A paleomagnetic test for motion of the Hawaiian hotspot. JOIDES Jour. 29:2-5.
  33. Koppers, A.A.P., Duncan, R.A. and Steinberger, B., 2004. Implications of a non-linear 40Ar/39Ar age progression along the Louisville seamount trail for models of fixed and moving hotspots. Geochemistry, Geophysics, Geosystems, 5: Art.No. Q06L02.
  34. Duncan, R.A. and Keller, R.A., 2004. Radiometric ages for basement rocks from the Emperor Seamounts, ODP Leg 197. Geochemistry, Geophysics, Geosystems, 5: Art.No. Q08L03, DOI 10.1029/2004GC000704.
  35. Harijoko, A., Sanematsu, K., Duncan, R.A., Prihatmoko, S. and Watanabe, K., 2004. Timing of the mineralization and volcanism at Cibaliumg gold deposit, western Java, Indonesia. Resource Geology, 54: 187-195.
  36. Jordan, B.T., Grunder, A.L., Duncan, R.A. and Deino, A.L., 2004. Geochronology of Oregon High Lava Plains volcanism: Mirror image of Yellowstone hotspot. J. Geophys. Res., 109: Art.No. B10202.
  37. Keller, R.A., Graham, D.W., Farley, K.A., Duncan, R.A. and Lupton, J.E., 2004. Cretaceous-to-Recent record of elevated 3He/4He along the Hawaiian-Emperor volcanic chain. Geochemistry, Geophysics, Geosystems, 5: Art.No. Q12L05.
  38. Mahoney, J.J., Duncan, R.A., Tejada, M.L.G. and Sager, W.W., 2004. A Jurassic-Cretaceous boundary age and mid-ocean-ridge-type mantle source for Shatsky Rise. Geology, 33: 185-188.
  39. Snow, L.J., Duncan, R.A. and Bralower, T.J., 2004. Trace element abundances in the Rock Canyon Anticline, Pueblo, Colorado marine sedimentary section and their relationship to ocean plateau construction and OAE2. Paleoceanography, 20, PA3005, doi:10.1029/2004PA001093.
  40. Sanematsu, Duncan, R.A., Imai, A. and Watanabe, K., 2004. Geochronological constraints using 40Ar/39Ar dating on the mineralization of the Hishikari epithermal gold deposit, Japan. Res. Geology, 55: 249-266.
  41. Storey, M., Pedersen, A.K., Stecher, O., Bernstein, S., Larsen, H.C., Larsen, L.M., Baker, J.A. and Duncan, R.A., 2004. Long-lived postbreakup magmatism along the East Greenland margin: Evidence for shallow-mantle metasomatism by the Iceland plume. Geology, 32: 173-176.
  42. Ghazi, A.M., Hassanipak, A.A., Mahoney, J.J. and Duncan, R.A., 2004. Geochemical characteristics, 40Ar-39Ar ages and original tectonic setting of the Band-e-Zeyarat/Dar Anar ophiolite, Makran accretionary prism, SE Iran. Tectonophysics, 393: 175-196.
  43. Erba, E. and Duncan, R., 2004. Environmental effects of Ontong Java Plateau formation: Implications for chronology, paleoproductivity and anoxia. Geochimica Et Cosmochimica Acta 68(11), A574-a574.
  44. Hall, L.S., Mahoney, J.J., Sinton, J.M. and Duncan, R.A., 2005. Spatial and temporal distribution of a C-like asthenospheric component in the Rano Rahi seamount field, East Pacific Rise, 15°-19°S. Geochem. Geophys. Geosys., doi:10.1029/
  45. Riley, T.R., Leat, P.T., Curtis, M.L., Millar, I.L., Duncan, R.A. and Fazel, A., 2005. Early-Middle Jurassic dolerite dykes from Western Dronning Maud Land (Antarctica): Identifying mantle sources in the Karoo large igneous province. J. Petrol., 46: 1489-1524.
  46. Melluso, L., Morra, V., Brotzu, P., Tommasini, S., Renna, M.R., Duncan, R.A., Franciosi, L., and D’Amelio, F., 2005. Geochronology and petrogenesis of the Cretaceous Antampombato-Ambatovy Complex and associated dyke swarm, Madagascar. J. Petrol., doi: 10.1093/petrology/egi044.
  47. Barragan, R., Baby, P. and Duncan, R., 2005. Cretaceous alkaline intra-plate magmatism in the Ecuadorian Oriente Basin: Geochemical, geochronological and tectonic evidence. Earth and Planetary Science Letters, 236: 670-690.
  48. Streck, M.J., Browning-Craig, H., Haldar, D., Ramos, F.C. and Duncan, R., 2005. Hornblende andesites/dacites in an oceanic arc setting at Narcondam volcano, Andaman Sea, SE Asia. Geochim. Cosmochim. Acta 69(10), A647-a647.
  49. Riley, T.R., Curtis, M.L., Leat, P.T., Watkeys, M.K., Duncan, R.A., Millar, I.L. and Owens, W.H., 2006. Overlap of Karoo and Ferrar magma types in KwaZulu-Natal, South Africa. J. Petrol., 47:541-566; doi:10.1093/petrology/egi085.
  50. Forsyth, D.W., Harmon, N., Scheirer, D.S. and Duncan, R.A., 2006. The distribution of recent volcanism and the morphology of seamounts and ridges in the GLIMPSE study area: Implications for the lithospheric cracking hypothesis for the origin of intraplate, non-hotspot volcanic chains. J. Geophys. Res., 111, B11407, doi: 10.1029/2005JB004075.
  51. Norman, M.D., Duncan, R.A. and Huard, J.J., 2006. Identifying impact events within the lunar cataclysm from 40Ar-39Ar ages and compositions of Apollo 16 impact melt rocks. Geochim. Cosmochim. Acta (Haskin volume) 70 (24): 6032-6049.
  52. Duncan, R.A., Tarduno, J.A. and Scholl, D.W., 2006. Leg 197 synthesis: Southward motion and geochemical variability of the Hawaiian hotspot. In, Duncan, R.A., Tarduno, J.A., Davies, T.A. and Scholl, D.W. (eds.), Proc. Ocean Drilling Program, Sci. Results, Ocean Drilling Program, College Station, TX, 197: College Station TX (Ocean Drilling Program), 1-39.
  53. Van Vliet-Lanoe, B., Gudmundsson, A., Duncan, R.A., Guillou, H., Scaillet, D., van Loon, A.J. and De Vleeschouwer, F., 2006. Volcanism-induced changes of ice-stream patterns. Palaeos (in press).
  54. Kela, J.M., Stakes, D.S. and Duncan, R.A., 2007. Geochemical and age constraints on the formation of the Gorda Escarpment and Mendocino Ridge of the Mendocino transform fault in the NE Pacific. Geol. Soc. Amer. Bull., v.119: 88-100.
  55. Roy, M., Clark, P.U., Duncan, R.A. and Hemming, S.A., 2007. Insights into the late Cenozoic configuration of the Laurentide ice sheet from 40Ar/39Ar dating of glacially transported minerals of midcontinent tills. Geochem. Geophys. Geosys., v. 8, n. 9, Q09006, doi: 10.1029/2006GC001572, 1-12.
  56. Tegner, C., Brooks, C.K., Duncan, R.A., Heister, L.E., Bernstein, S., 2008. 40Ar-39Ar age of intrusions in East Greenland: Rift-to-drift transition over the Iceland hotspot. Lithos, 101: 480-500.
  57. Chaytor, J.D., Keller, R.A., Duncan, R.A. and Dziak, R.P., 2007. Seamount morphology in the Bowie and Cobb hotspot trails, Gulf of Alaska. Geochem. Geophys. Geosys., v. 8, n. 9, Q09016, doi:10.1029/2007GC001712, 1-26.
  58. Sanematsu, K., Watanabe, K., Duncan, R.A. and Izawa, E., 2006. The history of vein formation determined by 40Ar/39Ar dating of adularia in the Hosen-1 vein at the Hishikari epithermal gold deposit, Japan. Econ. Geol., 101: 685-698.
  59. VanLaningham, S., Duncan, R. and Pisias, N., 2006. Erosion by rivers and transport pathways in the ocean: A provenance tool using 40Ar-39Ar incremental heating on fine-grained sediment. J. Geophys. Res., 111, F04014, doi: 1029/2006JF000583.
  60. Van Vliet-Lanoe, B., Gudmundsson, A., Guillou, H., Duncan, R.A., Genty, D., Ghaleb, B., Gouy, S., Recourt, P. and Scaillet, S., 2007. Limited glaciation and very early deglaciation in central Iceland: Implications for climate change. Comptes Rendus Geoscience, 339: 1-12.
  61. Storey, M., Duncan, R.A. and Swisher, C.C. III, 2007. Paleocene-Eocene Thermal Maximum and the opening of the Northeast Atlantic. Science, 316: 587-589, doi: 10.1126/science.1135274.
  62. Storey, M., Duncan, R.A. and Tegner, C., 2007. Timing and duration of volcanism in the North Atlantic Igneous Province: Implications for geodynamics and links to the Iceland hotspot. Chem. Geol., doi: 10.1016/j.chemgeol.2007.01.016.
  63. Coffin, M.F., Duncan, R.A., Eldholm, O., Fitton, J.G., Frey, F.A., Larsen, H.C., Mahoney, J.J., Saunders, A.D., Schlich, R., and Wallace, P.J., 2007. Large igneous provinces and scientific drilling: Status quo and a look ahead. Oceanography, 19: 150-160.
  64. VanLaningham, S., Duncan, R.A., Pisias, N.G. and Graham, D., 2008. Tracking fluvial response to climate change in the Pacific Northwest: A combined provenance approach using Ar and Nd isotopic systems on fine-grained sediments. Quaternary Science Reviews, 27: 497-517; doi: 10.1016/j.quascirev.2007.10.018.
  65. Norman, M.D., Duncan, R.A. and Huard, J.J., 2009. Age and provenance of the Descartes Terrane: Argon ages and geochemistry of lunar breccias 67016 and 67455. Geochim Cosmochim Acta, 10.1016/j.gca.2009.10.024.
  66. Curtis, M.L., Riley, T.R., Owens, W.H., Leat, P.T. and Duncan, R.A., 2008. The form, distribution and anisotropy of magnetic susceptibility of Jurassic dykes in H.U. Sverdrupfjella, Dronning Maud Land, Antarctica. Implications for dyke swarm emplacement. J. Structural Geology, 30: 1429-1447; doi: 10.1016/j.jsg.2008.08.004.
  67. VanLaningham, S., Pisias, N. G., Duncan, R.A. and Clift, P.D., 2008. Glacial-interglacial sediment transport to the Meiji Drift, northwest Pacific: Evidence for timing of Beringian outwashing. Earth Planetary Science Letters, 277:64-72.
  68. Clague, D.A., Paduan, J.B., Duncan, R.A., Huard, J.J., Davis, A.S., Castillo, P.R., Lonsdale, P. and DeVogelaare, A., 2009. Five million years of compositionally diverse, episodic volcanism: Construction of Davidson Seamount atop an abandoned spreading center. Geochem. Geophys. Geosys., 10: 1029/2009GC002665.
  69. Larsen, L.M., Heaman, L.M., Creaser, R.A., Duncan, R.A., Frei, R. and Hutchison, M., 2009. Tectonomagmatic events during stretching and basin formation in the Labrador Sea and Davis Strait: evidence from age and composition of Mesozoic and Palaeogene dyke swarms in West Greenland. J. Geol. Soc., 166: 999-1012.
  70. Longo, A. A., Dilles, J.H., Grunder, A.L. and Duncan, R.A., 2010. Evolution of calc-alkaline volcanism and associated hydrothermal gold deposits at Yanacocha, Peru. Economic Geology (in press).
  71. Tohma, Y., Imai, A., Sanematsu, K., Yonezu, K., Takahashi, R., Koyama, M., Sekine, R., Duncan, R. and Watanabe, K., 2010. Characteristics and mineralization age of the Fukusen No. 1 vein, Hishikari epithermal gold deposits, southern Kyushu, Japan. Resource Geology, 60: 348-358.
  72. Moore, J., White, W.M., Paul, D., Duncan, R.A., Abouchami, W. and Galer, S.J.G., 2010. Evolution of shield-building and post-erosional volcanism of Mauritius. J. Volcanol. Geotherm. Res. (submitted).
  73. Camp, V.E., Ross, M.E., Duncan, R.A., Jarboe, N.A., Coe, R.S. and Johnson, J.A., 2010. The Steens Basalt: Earliest Lavas of the Columbia River Basalt Group. Geol. Soc. Amer. (submitted).
  74. Waagstein, R., Duncan, R.A. and Abrahamsen, N., 2010. Seismic mapping and 40Ar-39Ar dating of a folded and deeply eroded portion of the North Atlantic Igneous Province southwest of the Faroe Islands: flood basalt volcanism before, during and after continental breakup. (in prep.)
  75. Shrivastava, J.P., Duncanb, R.A. and Kashyap, M., 2010. Younger 40Ar-39Ar ages of the Mandla lavas: implications for the duration of Deccan volcanism. (in prep.)
  76. Koppers, A.A.P., Lindle, M.E., Colwell, L.E., Pitcavage, E., Gee, J.S., Lonsdale, P.F., Mahoney, J.J. and Duncan, R.A., 2010. Evidence for differential Hawaiian and Louisville hotspot motions based on 40Ar-39Ar geochronology. Geochem. Geophys. Geosys. (submitted)
  77. Ray, J.S., Mahoney, J.J., Duncan, R.A., Ray, J., Wessel, P. and Naar, D.F., 2010. Chronology and geochemistry of lavas from the Nazca Ridge and Easter Seamount Chain: a ~30 Myr hotspot record. (in prep.)
  78. Helgason, J. and Duncan, R.A., 2010. Magnetostratigraphy, 40Ar-39Ar dating and glacial history of Svinafell, SE Iceland. Jokull (submitted).
  79. Haase, K.M., Regelous, M., Duncan, R.A., Brandl, P., Stroncik, N. and Grevemeyer, I., 2010. Insights into mantle composition and mantle melting beneath mid-ocean ridges from post-spreading volcanism on the fossil Galapagos Rise. Geochem. Geophys. Geosys. (submitted).
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