Anthony Koppers
Associate Professor in MG&G, COAS, Oregon State University
Head Database Manager and Webmaster, EarthRef.org
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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
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Ph.D. Researcher, September 1993 - October 1998
Research Associate, May 1998 - October 1998
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
Associate Professor Marine Geology & Geophysics, March 2007 - Present
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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
Webmaster and Database Management for EarthRef.org, 2000 – present
GERM Editor for Database Management and Cyberinfrastructure, 2001 – present
Radiometric Taskforce (member) International Commission on Stratigraphy, 2002 – present
MagIC Metadata Committee (chair) for the Paleomagnetic Archival Group, 2002 – present
AGU Index Committee (member) for the Volcanology-Geochemistry-Petrology, 2003 – 2005
Seamount Biogeosciences Network (co-director), 2005 – present
COAS Noble Gas Mass Spectrometry Lab (co-director), 2007 – present
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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 ...
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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.
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.
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, 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/tools/ararcalc.htm)
P. Solheid, C. Constable, A.A.P. Koppers, M. Jackson, and S. Banerjee, 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, 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, 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, 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, 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, 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, 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.
A.A.P. Koppers, 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, 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, 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, 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 (In Press).
A.A.P. Koppers (2008). Pacific Region. In: Encyclopedia of Islands, G. R. and D.A. Clague, Berkeley, University of California Press (In Press).
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 Near the Southern Hemisphere Tangent Cylinder. Geochemistry Geophysics Geosystems (Under Review).
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 and Planetary Science Letters (Under Review). |
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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.
Hubert Staudigel (Scripps Institution of Oceanography)
Jan Wijbrans (Vrije Universiteit Amsterdam)
Bob Duncan (Oregon State University)
Jason Phipps Morgan (Scripps Institution of Oceanography)
Malcolm Pringle (SURCC)
Gareth Davies (Vrije Universiteit Amsterdam)
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
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.
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 | ALIA Expedition around Samoa
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 | FeMO2 Dive Cruise 2007
The Iron-Oxidizing Microbial Observatory (FeMO) uses the Loihi Seamount as a natural laboratory for studies of Earth's rust-forming microbial inhabitants to address the basic questions of who they are, how fast do they grow and form rust, where and why do they do it, and what are their environmental impacts? |
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 | Vailulu'u Web Page
To the Eastside of Ta'u Island
an active underwater volcano, named Vailulu'u, is present. This unique seamount already has been the subject of three previous seagoing cruises. Read more about the outcome of these cruises ... |
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 | 40Ar/39Ar
Geochronology Software
The program ArArCALC provides an interactive interface to data reduction in 40Ar/39Ar geochronology using Excel 2000-XP-2003 ... |
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 | COAS 40Ar/39Ar
Geochronology Laboratory
Geochronology is continually evolving and growing more precise, with studies focusing on the ages of MORB, OIB, lunar and planetary rocks, hydrothermal minerals, and clays. Employed in this lab is the 40Ar/39Ar dating method using an MAP 215-50 rare gas mass spectrometer for analysis and a resistance furnace or laser for gas extraction ... |
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 | TnT2000
Software
TnT2000 is a MATLAB toolbox for modeling both simple and sophisticated scenarios that mimic the geochemical differentiation of the Earth ... |
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 | Hawaiian Volcanoes Field Trips
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The Rock
Saw
Anthony gets to work
cutting the rocks from dredge 127. Each sample has to be cut
into various shapes for processing, and this is the saw we use to do
it. |
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Slicing
through the Clear Waters
The
clear water around Wallis island makes it easy to see the unique
shape of the Kilo Moana's bow. |
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Video Archive |
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Melville, AVON Leg 2, Gilbert and Tokelau Seamounts, January - March 1999
Melville, AVON Leg 3, Samoan Hotspot and the Vailulu'u Underwater Volcano, March 1999
Coastguard Polar Sea, DEEPFREEZE, Vailulu’u Seamount Revisited, March 2001
R/V Kilo Moana, KM0506/ALIA Expedition, Vailulu’u and the Samoan Hotspot, April 2005
R/V Kilo Moana, FeMO2 Expedition, JASON on Loihi Seamount, October 2007
R/V Revelle, AMAT Leg 2, IODP Site Survey, Louisville Seamounts, January - March 2006
ODP Guyot and Atoll Drilling Legs 143 and 144, Isotope Geochemistry
ODP Mariana Trench Leg 185, 40Ar/39Ar Geochronology
ODP Shatsky Rise Leg 191, 40Ar/39Ar Geochronology
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Cathy Constable
Bob Duncan
Jeff Gee
Stan Hart
John Helly
Cathy Manduca
John Mahoney
Chris Massell Symons
Jason Phipps Morgan
Will Sager
Hubert Staudigel
Lisa Tauxe
Dave Graham
Roger Nielsen
Adam Kent
Nick Pisias
Jamie Russell (masters)
Lynn Oschmann
Naoto Hirano
Henk Helmers (M.Sc.)
Jan Wijbrans (Ph.D.)
Hubert Staudigel (Ph.D. and post-doctoral)
Jason Phipps Morgan (post-doctoral)
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