Anthony Koppers
Professor in Marine Geology, CEOAS, Oregon State University
Director, OSU Argon Geochronology Laboratory
Co-director, OSU Marine and Geology Repository
Chair, IODP JOIDES Resolution Facility Board
Head Database Manager and Webmaster, EarthRef.org

	Vrije Universiteit, Amsterdam B.Sc. in Geology, Cum Laude, 1987 - 1988 M.Sc. in Isotope Geology, Petrology and Structural Geology, Honors, 1988 - 1993 Ph.D. in 40Ar/39Ar Geochronology, Plate Tectonics and Mantle Geochemistry, 1993 - 1998

	Vrije Universiteit, Amsterdam Ph.D. Researcher, September 1993 - October 1998 Research Associate, May 1998 - October 1998 Scripps Institution of Oceanography Visiting NATO scholar, October 1998 - October 1999 Post Doctoral Researcher, October 1999 - September 2001 Assistant Project Scientist, September 2001 - September 2003 Assistant Research Geophysicist, September 2003 - June 2006 Associate Research Geophysicist, July 2006 - February 2007 Research Associate, March 2007 - present CEOAS, Oregon State University Associate Professor Marine Geology & Geophysics, March 2007 - July 2013 Tenured Full Professor Marine Geology & Geophysics, July 2013 - present

	Organization Geochemical Earth Reference Model Workshop, La Jolla, March 2001 Organization Paleomagnetic Workshop Workshop, La Jolla, March 2002 Organization Geochemical Earth Reference Model Workshop, Lyon, France, May 2003 Organization Seamount Biogeosciences Workshop, La Jolla, March 2006 Organization Geochemical Earth Reference Model Workshop, New York, May 2006 GERM Editor for Database Management and Cyberinfrastructure, 2001 - 2006 Radiometric Taskforce (member) International Commission on Stratigraphy, 2002 AGU Index Committee (member) for the Volcanology-Geochemistry-Petrology, 2003 - 2005 Seamount Biogeosciences Network (co-director), 2005 - 2010 Convener Seamount/SBN session, Fall Meeting AGU, December 2006 IODP Hotspot Geodynamics Detailed Planning Group (member), 2006 - 2007 NSTA Webseminar "Plate Tectonics Made to Order", November 2006 Convener Session on Interoperability Earth Science Databases, Fall Meeting AGU, 2006 NSTA Webseminar "Hotspots, Plumes & LIPs: Everything's Coming Up Igneous", 2007 NSTA Webseminar "Earth in Reverse: Magnetic Wiggles on the Ocean Floor", 2008 Organization SERC/ERESE Teaching Developers Workshop, La Jolla, March 2008 Organization SEAMOUNTS'09 Workshop, La Jolla, March 2009 IODP US Advisory Committee (USAC member), 2009 - 2011 IODP US Advisory Committee (USAC chair), 2011 - 2013 Guest Editor Oceanography, Mountains in the Sea, March 2010 Lead Theme Editor G3, Studies of Seamount Trails: Implications for Geodynamic Mantle Flow Models and the Geochemical Evolution of Primary Hotspots, 2011 - 2015 OSU Argon Geochronology Lab (co-director), 2007 - 2012 IODP JOIDES Resolution Facilities Board (JRFB member), 2014 - 2015 Webmaster and Database Management for EarthRef.org, 2000 - present MagIC Metadata Committee (chair) for the Paleomagnetic Archival Group, 2002 - present OSU Argon Geochronology Lab (director), 2012 - present OSU Marine and Geology Repository (co-director), 2010 - present Theme Co-Editor G3, Wilson Cycles and the Formation of Marginal Basins: Rifting Dynamics and Mantle Evolution from Mid-ocean Ridge Creation to Extinction, 2015 - present IODP JOIDES Resolution Facilities Board (JRFB chair), 2015 - present Organization Paleomagnetic MagIC Workshop, La Jolla, January 2017 Organization Biannual International Curators Workshop, Corvallis, April 2017

	Vrije Universiteit, Amsterdam A.A.P. Koppers, 1992. On the Migmatites of the West Uusimaa Granulite Complex, SW Finland. M.Sc. Thesis, Free University Amsterdam, Department Petrology and Isotope Geology. A.A.P. Koppers, 1992. P-T-t Paths in Metamorphic Belts: obtaining Prograde and Peak Metamorphic P-T-t Conditions from Garnets. M.Sc. Thesis, Free University Amsterdam, Department Petrology and Isotope Geology. A.A.P. Koppers, 1993. Isotopic Characterization of Oceanic Basalts and Identification of their Mantle Components. M.Sc. Thesis, Free University Amsterdam, Department Petrology and Isotope Geology. A.A.P. Koppers, 1998. Geochronology and Isotope Geochemistry of Western Pacific Seamounts: Implications for Absolute Pacific Plate motions and the motion of Hotspots. Ph.D. Thesis, Free University Amsterdam, Department Petrology and Isotope Geology, 263 pages. See the summary at the bottom of this page ...

	1995 - 1999 A.A.P. Koppers, H. Staudigel, D.M. Christie, J.J. Dieu and M.S. Pringle (1995). Sr-Nd-Pb Isotope Geochemistry of Leg 144 West Pacific Guyots: Implications for the Geochemical Evolution of the "SOPITA" Mantle Anomaly. in: Haggerty, J.A., I. Premoli-Silva, F. Rack, M.K. McNutt (Editors). Proceedings of the Ocean Drilling Program, Scientific Results, 144, 535-545.   PDF J.R. Wijbrans, M.S. Pringle, A.A.P. Koppers and R. Scheveers (1995). Argon Geochronology of Small Samples using the VULKAAN argon laserprobe. Proceedings Koninklijke Nederlandse Akademie van Wetenschappen, 98: 185-218. A.A.P. Koppers, H. Staudigel, J.R. Wijbrans and M.S. Pringle (1998). The Magellan seamount trail: implications for Cretaceous hotspot volcanism and absolute Pacific plate motion. Earth and Planetary Science Letters, 163: 53-68. 2000 - 2004 A.A.P. Koppers, H. Staudigel and J.R. Wijbrans (2000). Dating Crystalline Groundmass separates of Altered Cretaceous Seamount Basalts by the 40Ar/39Ar Incremental Heating Technique. Chemical Geology, 166: 139-158. W.W. Sager and A.A.P. Koppers (2000). Rapid Late Cretaceous polar wander of the Pacific plate: a true polar wander event? Science, 287: 455-459. S.R. Hart, H. Staudigel, A.A.P. Koppers, J. Blusztajn, E. T. Baker, R. Workman, M. Jackson, E. Hauri, M. Kurz, K. Sims, D. Fornari, A. Saal and S. Lyons (2000). Vailulu'u Undersea Volcano: The New Samoa. Geochemistry, Geophysics, Geosystems, Vol 1, Papernumber 2000GC000108. A.A.P. Koppers, J. Phipps Morgan, W.J. Morgan and H. Staudigel (2001). Testing the fixed hotspot hypothesis using 40Ar/39Ar age progressions along seamount trails. Earth and Planetary Science Letters, 185: 237-252. A.A.P. Koppers (2002). ArArCALC -- software for 40Ar/39Ar age calculations. Computers and Geosciences. 28, 605-619. http://earthref.org/ArArCALC/ P. Solheid, C. Constable, A.A.P. Koppers, M. Jackson and S. Banerjee (2002). Research-oriented database for rock and paleomagnetism to be developed. EOS 83-48: 560, News Item 26 November 2002. H. Staudigel, J. Helly, A.A.P. Koppers, H. Shaw, B. McDonough, A. Hofmann, C. Langmuir, K. Lehnert, B. Sarbas, L. Derry and A. Zindler (2003). Electronic data publication in geochemistry. Geochemistry, Geophysics, Geosystems: paper number: 2002GC000314. J. Helly, H. Staudigel and A.A.P. Koppers (2003). Scalable models of data sharing in Earth sciences. Geochemistry, Geophysics, Geosystems: paper number: 2002GC000318. L. Tauxe, C. Constable, C.L. Johnson, A.A.P. Koppers, W.R. Miller and H. Staudigel (2003). Paleomagnetism of the southwestern U.S.A. recorded by 0-5 Ma igneous rocks. Geochemistry, Geophysics, Geosystems: paper number: 2002GC000343. A.A.P. Koppers, H. Staudigel, M.S. Pringle and J.R. Wijbrans (2003). Short-lived and discontinuous intra-plate volcanism in the South Pacific: hotspots or extensional volcanism? Geochemistry, Geophysics, Geosystems: paper number: 2003GC000533. S.R. Hart, H., Staudigel, R. Workman, A.A.P. Koppers and A.P. Girard (2003). A fluorescein tracer release experiment in the hydrothermally active crater of Vailulu’u volcano, Samoa. Journal of Geophysical Research: paper number: 2002JB001902. 11 pp. H. Staudigel, S. Hart, A.A.P. Koppers, C. Constable, M. Kurz, R. Workman and E. Baker (2003). Hydrothermal venting at Vailulu’u seamount: the smoking end of the Samoan chain. Geochemistry, Geophysics, Geosystems: paper number: 2002GC000314. 17 pp. A.A.P. Koppers, H. Staudigel and R.A. Duncan (2003). High resolution 40Ar/39Ar dating of the oldest oceanic basement basalts in the western Pacific basin. Geochemistry, Geophysics, Geosystems: paper number: 2003GC000574. 22 pp. A.A.P. Koppers, R.A. Duncan and B. Steinberger (2004). Implications of a nonlinear 40Ar/39Ar age progression along the Louisville seamount trail for models of fixed and moving hotspots. Geochemistry, Geophysics, Geosystems: paper number: 2003GC000671. 22 pp. 2005 - 2009 A.A.P. Koppers and H. Staudigel (2005). Asynchronous Bends in Pacific Seamount Trails: A Case for Extensional Volcanism? Science 307: 904-907. H. Staudigel, S.R. Hart, A. Pile, B.E. Bailey, E.T. Baker, S. Brooke, D.P. Connelly, L. Haucke, C.R. German, I. Hudson, D. Jones, A.A.P. Koppers, J. Konter, R. Lee, T.W. Pietsch, B.M. Tebo, A.S. Templeton, R. Zierenberg and C.M. Young (2006). Vailulu’u Seamount, Samoa: Life and Death on an Active Submarine Volcano. Proceedings National Academy of Sciences, 103(17), 6448-6453. ARTICLE# 06-00830. N. Hirano and A.A.P. Koppers (2007). Response [3] to Another Nail in Which Coffin? Science 315(5808), 40. M. Jackson, S.R. Hart, A.A.P. Koppers, H. Staudigel, J. Konter,  J. Blusztajn, M. Kurz and J.A. Russell (2007). The return of subducted continental crust in Samoan lavas. Nature 448, 684-687, doi:10.1038/nature06048. A.A.P. Koppers, J.A. Russell, M. Jackson, H. Staudigel, J. Konter and S.R. Hart (2008). Samoa reinstated as a primary hotspot trail. Geology 36(6), 435-438, doi:10.1130/G24630A.1. N. Hirano, A.A.P. Koppers, A. Takahashi, T. Fujiwara and M. Nakanishi (2008). Seamounts, knolls and petit-spot monogenetic volcanoes on the subducting Pacific Plate. Basin Research 20, 543-553, doi:10.1111/j.1365-2117.2008.00363.x. J.G. Konter, B.B. Hanan, J. Blichert-Toft, A.A.P. Koppers, T. Plank and H. Staudigel (2008). One hundred million years of mantle geochemical history suggest the retiring of mantle plumes is premature. Earth Planetary Science Letters 275, 285–295, doi:10.1016/j.epsl.2008.08.023. K.P. Lawrence, L. Tauxe, H. Staudigel, C.G. Constable, A.A.P. Koppers, W.C. McIntosh and C.L. Johnson (2008). Paleomagnetic field properties at high southern latitude. Geochemistry Geophysics Geosystems, doi:10.1029/2008GC002072. A.A.P. Koppers (2009). Pacific Region. In: Encyclopedia of Islands, G. R. Gillespie and D.A. Clague, Berkeley, University of California Press, 702-715. P.R. Renne, A.L. Deino, M.T. Heizler, S.R. Hemming, A.A.P. Koppers, D. Phillips, B.S. Singer, B.D. Turrin, I.M. Villa, M. Villeneuve and J.R. Wijbrans (2009). Data Reporting Norms for 40Ar/39Ar Geochronology, Quaternary Geology 4, 346–352, doi:10.1016/j.quageo.2009.06.005. 2010 - 2014 A.A.P. Koppers and A.B. Watts (2010). Intraplate Seamounts as a Window into Deep Earth Processes. Oceanography 23(1): 42-57. A.B. Watts, A.A.P. Koppers and D.P. Robinson (2010). Seamount Subduction and Earthquakes. Oceanography 23(1): 166-173. Staudigel, H., A.A.P. Koppers, T.A. Plank and B.B. Hanan (2010). Seamounts in the Subduction Factory. Oceanography 23(1): 176-181 H. Staudigel, C.L. Moyer, M.O. Garcia, A. Malahoff, D.A. Clague and A.A.P. Koppers (2010). Loihi Seamount. Oceanography 23(1): 72-73. A.A.P. Koppers, H. Staudigel, S.R. Hart, C. Young and J.G. Konter (2010). Vailulu’u Seamount. Oceanography 23(1): 164-165. H. Staudigel, A.A.P. Koppers, J.W. Lavelle, T.J. Pitcher and T.M. Shank (2010). Defining the Word "Seamount". Oceanography 23(1): 20-21. A.A.P. Koppers, H. Staudigel and R. Minnett (2010). Seamount Catalog: Seamount Morphology, Maps, and Data Files. Oceanography 23(1): 36-37. M.G. Jackson, S.R. Hart, J.G. Konter, A.A.P. Koppers, H. Staudigel, M.D. Kurz, J. Blusztajn and J.M. Sinton (2010). The Samoan hotspot track on a “hotspot highway”: Implications for mantle plumes and a deep Samoan mantle source. Geochemistry, Geophysics, Geosystems 11(12), doi:10.1029/2010gc003232. D.J. Wright, J. Roberts, D. Fenner, J.R. Smith, A.A.P. Koppers, D. Naar, E.R. Hirsch, L.W. Clift and K.R. Hogrefe (2011). Seamounts, ridges, and reef habitats of American Samoa, in P.T. Harris and E.K. Baker (eds.): Seafloor Geomorphology as Benthic Habitat: GeoHab Atlas of Seafloor Geomorphic Features and Benthic Habitats, Elsevier, Amsterdam. C. Timm, K. Hoernle, R. Werner, F. Hauff, P.v. den Bogaard, P. Michael, M.F. Coffin and A.A.P. Koppers (2011). Age and geochemistry of the oceanic Manihiki Plateau, SW Pacific: New evidence for a plume origin. Earth and Planetary Science Letters DOI: 10.1016/j.epsl.2011.01.025. A.A.P. Koppers, J.A. Russell, J. Roberts, M.G. Jackson, J.G. Konter, D.J. Wright, H. Staudigel and S.R. Hart (2011). Age Systematics of Two Young En Echelon Samoan Volcanic Trails. Geochemistry Geophysics Geosystems, doi:10.1029/2010GC003438. A.A.P. Koppers, M.D. Gowen, L.E. Colwell, J.S. Gee, P.F. Lonsdale, J.J. Mahoney and R.A. Duncan (2011). New 40Ar/39Ar Age Progression for the Louisville Hotspot Trail and Implications for Inter-Hotspot Motion. Geochemistry Geophysics Geosystems, doi:10.1029/2011GC003804. A.A.P. Koppers, T. Yamazaki, J. Geldmacher, J.S. Gee, N. Pressling, H. Hiroyuki and IODP Expedition 330 Science Party (2012). Limited Latitudinal Mantle Plume Motion for the Louisville Hotspot. Nature Geoscience. doi: 10.1038/NGEO1638. A.A.P. Koppers, T. Yamazaki, J. Geldmacher and IODP Expedition 330 Science Party (2013). IODP Expedition 330: Drilling the Louisville Seamount Trail in the SW Pacific. Scientific Drilling 15: 11-22. doi: 10.2204/iodp.sd.15.02.2013. Cromwell, G., L. Tauxe, H. Staudigel, C.G. Constable, A.A.P. Koppers and R.B. Pedersen (2013). In search of long term hemispheric asymmetry in the geomagnetic field: Results from high northern latitudes. Geochemistry, Geophysics, Geosystems. doi: 10.1002/ggge.20174. Sager, W.W., J. Zhang, J. Korenaga, T. Sano, A.A.P. Koppers, M. Widdowson and J.J. Mahoney (2013). An immense shield volcano within the Shatsky Rise oceanic plateau, northwest Pacific Ocean. Nature Geoscience, doi:10.1038/ngeo1934. O’Connor, J.M., B. Steinberger, M. Regelous, A.A.P. Koppers, J.R. Wijbrans, K.M. Haase, P. Stoffers, W. Jokat, and D. Garbe-Schönberg (2013). Constraints on past plate and mantle motion from new ages for the Hawaiian-Emperor Seamount Chain, Geochemistry, Geophysics, Geosystems. doi:10.1002/ggge.20267. 2015 - 2019 Vanderkluysen, L., J.J. Mahoney, A.A.P. Koppers, C. Beier, M. Regelous, J.S. Gee and P.F. Lonsdale (2014). Louisville Seamount Chain: Petrogenetic processes and geochemical evolution of the mantle source. Geochemistry, Geophysics, Geosystems. doi: 10.1002/2014GC005288. A.A.P. Koppers and Sager, W.W., 2014. Large-Scale and Long-Term Volcanism on Oceanic Lithosphere, Developments in Marine Geology, pp. 553-597 Li, C.F., Xu, X., Lin, J., Sun, Z., Zhu, J., Yao, Y.J., Zhao, X.X., Liu, Q.S., Kulhanek, D.K., Wang, J., Song, T.R., Zhao, J.F., Qiu, N., Guan, Y.X., Zhou, Z.Y., Williams, T., Bao, R., Briais, A., Brown, E.A., Chen, Y.F., Clift, P.D., Colwell, F.S., Dadd, K.A., Ding, W.W., Almeida, I.H., Huang, X.L., Hyun, S.M., Jiang, T., A.A.P. Koppers, Li, Q.Y., Liu, C.L., Liu, Z.F., Nagai, R.H., Peleo-Alampay, A., Su, X., Tejada, M.L.G., Trinh, H.S., Yeh, Y.C., Zhang, C.L., Zhang, F. and Zhang, G.L., 2014. Ages and magnetic structures of the South China Sea constrained by deep tow magnetic surveys and IODP Expedition 349. Geochemistry Geophysics Geosystems, 15(12): 4958-4983, doi: 10.1002/2014gc005567 Staudigel, H. and A.A.P. Koppers, 2015. Chapter 22: Seamounts and Island Building, The Encyclopedia of Volcanism. Elsevier, pp. 17 Meco, J., A.A.P. Koppers, Miggins, D.P., Lomoschitz, A. and Betancort, J.-F., 2015. The Canary record of the evolution of the North Atlantic Pliocene: New 40Ar/39Ar ages and some notable palaeontological evidence. Palaeogeography, Palaeoclimatology, Palaeoecology, 435: 53-69, doi: 10.1016/j.palaeo.2015.05.027 Li, C.F., Li, J.B., Ding, W.W., Franke, D., Yao, Y.J., Shi, H.S., Pang, X., Cao, Y., Lin, J., Kulhanek, D.K., Williams, T., Bao, R., Briais, A., Brown, E.A., Chen, Y.F., Clift, P.D., Colwell, F.S., Dadd, K.A., Hernandez-Almeida, I., Huang, X.L., Hyun, S., Jiang, T., A.A.P. Koppers, Li, Q.Y., Liu, C.L., Liu, Q.S., Liu, Z.F., Nagai, R.H., Peleo-Alampay, A., Su, X., Sun, Z., Tejada, M.L.G., Trinh, H.S., Yeh, Y.C., Zhang, C.L., Zhang, F., Zhang, G.L. and Zhao, X.X., 2015. Seismic stratigraphy of the central South China Sea basin and implications for neotectonics. Journal of Geophysical Research-Solid Earth, 120(3): 1377-1399, doi: 10.1002/2014jb011686 Jackson, M., Koga, K., Price, A., Konter, J., A.A.P. Koppers, Finlayson, V., Konrad, K., Hauri, E., Kylander‐Clark, A. and Kelley, K.A., 2015. Deeply dredged submarine HIMU glasses from the Tuvalu Islands, Polynesia: Implications for volatile budgets of recycled oceanic crust. Geochemistry, Geophysics, Geosystems, 16(9): 3,210-3,234, doi:10.1002/2015GC005966 Price, A.A., Jackson, M.G., Blichert-Toft, J., Blusztajn, J., Conatser, C.S., Konter, J.G., A.A.P. Koppers and Kurz, M.D., 2016. Geochemical evidence in the northeast Lau Basin for subduction of the Cook-Austral volcanic chain in the Tonga Trench. Geochemistry, Geophysics, Geosystems, 17(5): 1694-1724, doi: 10.1002/2015gc006237 Shah, J., A.A.P. Koppers, Leitner, M., Leonhardt, R., Muxworthy, A.R., Heunemann, C., Bachtadse, V., Ashley, J.A.D. and Matzka, J., 2016. Palaeomagnetic evidence for the persistence or recurrence of geomagnetic main field anomalies in the South Atlantic. Earth and Planetary Science Letters, 441: 113-124, doi: 10.1016/j.epsl.2016.02.039 Balbas, A., A.A.P. Koppers, Kent, D.V., Konrad, K. and Clark, P.U., 2016. Identification of the short-lived Santa Rosa geomagnetic excursion in lavas on Floreana Island (Galapagos) by 40Ar/39Ar geochronology. Geology, 44(5), pp.359-362, G37569.1, doi: 10.1130/g37569.1 Tauxe, L., Shaar, R., Jonestrask, L., Swanson‐Hysell, N., Minnett, R., A.A.P. Koppers, Constable, C., Jarboe, N., Gaastra, K. and Fairchild, L., 2016. PmagPy: Software package for paleomagnetic data analysis and a bridge to the Magnetics Information Consortium (MagIC) Database. Geochemistry, Geophysics, Geosystems, doi: 10.1002/2016GC006307 Tejada, M.L.G., Geldmacher, J., Hauff, F., Heaton, D., A.A.P. Koppers, Garbe-Schönberg, D., Hoernle, K., Heydolph, K. and Sager, W.W., 2016. Geochemistry and age of Shatsky, Hess, and Ojin Rise seamounts: Implications for a connection between the Shatsky and Hess Rises. Geochimica et Cosmochimica Acta, 185: 302-327, doi: 10.1016/j.gca.2016.04.006 Reports and Publications, Non-Refereed Expedition 324 Scientists (2010). Testing plume and plate models of ocean plateau formation at Shatsky Rise, northwest Pacific Ocean. IODP Preliminary Report 324, doi:10.2204/iodp.pr.324.2010. W.W. Sager, T. Sano, J. Geldmacher and Expedition 324 Scientists (2010). Proceedings IODP 324: Tokyo (Integrated Ocean Drilling Program Management International, Inc.), doi:10.2204/iodp.proc.324.2010. A.A.P. Koppers, T. Sano, J.H. Natland, M. Widdowson, R. Almeev, A.R. Greene, D.T. Murphy, A. Delacour, M. Miyoshi, K. Shimizu, S. Li, N. Hirano, J. Geldmacher and Expedition 324 Scientists (2010). Massive basalt flows on the southern flank of Tamu Massif, Shatsky Rise: a reappraisal of ODP Site 1213 basement units. In W.W. Sager, T. Sano, J. Geldmacher and the Expedition 324 Scientists, Proc. IODP, 324: Tokyo (Integrated Ocean Drilling Program Management International, Inc.) doi:10.2204/iodp.proc.324.109.2010. A.A.P. Koppers, T. Yamazaki and J. Geldmacher (2010). Louisville Seamount Trail: implications for geodynamic mantle flow models and the geochemical evolution of primary hotspots. IODP Science Prospectus 330, doi:10.2204/iodp.sp.330.2010 Expedition 330 Scientists (2011). Louisville Seamount Trail: implications for geodynamic mantle flow models and the geochemical evolution of primary hotspots. IODP Preliminary Report 330, doi:10.2204/iodp.pr.330.2011. A.A.P. Koppers, T. Yamazaki and J. Geldmacher and IODP Expedition 330 Science Party (2012). Proceedings IODP 330: Tokyo (Integrated Ocean Drilling Program Management International, Inc.), doi:10.2204/iodp.proc.330.2012. A.A.P. Koppers (2011). Mantle plumes persevere. Nature Geoscience 4(12): 816-817. doi: 10.1038/ngeo1334. A.A.P. Koppers, L. Screaton and Steering Committee (2012). Building U.S. Strategies for 2013-2023 Scientific Ocean Drilling. Workshop Report. April 30-May 2, Denver. Published 15 June 2011. http://iodp-usssp.org/workshop/strategies/ Humphries, S.E. and A.A.P. Koppers (2013). Planning for Future Directions of Scientific Ocean Drilling With the D/V JOIDES Resolution. Eos, Vol. 94, No. 26, 25 June 2013. Expedition 349 Scientists (2014). South China Sea Tectonics: Opening of the South China Sea and its implications for southeast Asian tectonics, climates, and deep mantle processes since the late Mesozoic. IODP Preliminary Report 349, doi:10.2204/iodp.pr.349.2011. Humphris, S.E. and A.A.P. Koppers (2015). Scientific Ocean Drilling Charts its Course. Project Update Eos, 96, doi:10.1029/2015EO040947. Published on 15 December 2015 https://eos.org/project-updates/scientific-ocean-drilling-charts-new-course

	40Ar/39Ar Geochronology and Isotope Geochemistry of the West Pacific Seamount Province: Implications for Absolute Pacific Plate Motion and the Motion of Hotspots (1998) by Anthony A.P. Koppers Laboratory of Isotope Geology Department of Petrology and Isotope Geology Faculty of Earth Sciences, Vrije Universiteit De Boelelaan 1085, 1081 HV Amsterdam The Netherlands. Supervisors Hubert Staudigel (Scripps Institution of Oceanography) Jan Wijbrans (Vrije Universiteit Amsterdam) Committee Bob Duncan (Oregon State University) Jason Phipps Morgan (Scripps Institution of Oceanography) Malcolm Pringle (SURCC) Gareth Davies (Vrije Universiteit Amsterdam) Financial Support Netherlands Foundation of Earth Sciences Research (GOA). Part of the Netherlands Foundation of Scientific Research (NWO). Project 750.60.005 National Science Foundation (NSF). Project OCE 91-02183 Summary and Scope Hotspots and the associated intra-plate volcanism producing seamount trails are amongst the most significant observations supporting plate tectonics. The azimuths and age progressions of these seamount trails provide the only means to determine absolute plate motions with respect to an independent reference frame of “fixed” hotspots. However, the fixity and continuity of hotspots are not truly established since most seamount trails older than 25 Ma only have been studied on a reconnaissance level. Many questions remain about hotspot volcanism, concerning (1) the volcanic processes producing seamount edifices, (2) the timing, typical time ranges and possible quiescent periods in volcanic activity, (3) the time-space relationships within seamount trails and the modeled absolute plate motion from these trails, (4) the consequences of the crossing of younger hotspot trails over older hotspot trails, (5) the isotopic and geochemical evolution of hotspots, and (6) the fixity, continuity and longevity of individual hotspots. In this thesis, nine seamount trails of the West Pacific Seamount Province (WPSP) are the focus of a study of their 40Ar/39Ar geochronology and Sr-Nd-Pb isotope geochemistry. This group of seamount trails ranges in age from 70 to 140 Ma and will be used to analyze (1) Cretaceous hotspot volcanism in the Pacific, (2) the tectonic and geochemical relationship between the WPSP hotspots and the currently-active hotspots in the South Pacific Isotopic and Thermal Anomaly (SOPITA), and (3) the stage poles of absolute Pacific plate motion for the last 140 Myr. In these analyses, in particular, the (non-)fixity and longevity of these Pacific hotspots will be addressed.