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• Hoernle, Kaj

• since 01/04  Associate Professor (C3); Petrology and Geochemistry; GEOMAR Helmholtz Centre for Ocean Research at the Christian-Albrechts University of Kiel, Germany
• 04/94 - 12/03  Associate Professor (C3); Petrology and Geochemistry; GEOMAR Research Center at the Christian-Albrechts University of Kiel, Germany
• 1993 - 1994  Assistant Research Scientist and Lecturer, Marine Sciences Institute and Dept. of Geological Sciences, University of California, Santa Cruz, U.S.A.
• 1991 - 1993  Postdoctoral Researcher, University of California, Santa Cruz
• 1990 - 1991  Postdoctoral Researcher, Department of Geological Sciences, University of California, Santa Barbara
• 06/1990  Ph.D., Geochemistry, University of California, Santa Barbara, U.S.A. Advisor:  Prof. George Tilton
• 03/1987  M.A., Petrology, University of California, Santa Barbara
• 05/1982  B.A., Summa Cum Laude, Geology, Columbia University, New York City
• 06/1978  High School Diploma, Valedictorian, Richmond Academy High School, Augusta, Georgia, U.S.A.

Since 07/2006 Chair, Collaborative Research Center SFB574 “Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters” at the Christian Albrechts University of Kiel (http://www.sfb574.ifm-geomar.de/php/goto/Home/index.php)

11/1999-02/2007 Assistant Director, IFM-GEOMAR Leibniz Institute for Marine Sciences and GEOMAR Research Center for Marine Geosciences

Since 09/2006 Member of the Hotspot Geodynamics Detailed Planning Group (DPG) established by the IODP Science Planning Committee (SPC)

Since 2001 Member, InterRidge Work Group “Ridge-Hotspot Interaction”.

1-4/2004 Acting Chair of Research Division 4: Dynamics of the Ocean Floor, IFM-GEOMAR Leibniz Institute for Marine Sciences

03/2003-12/2003 Acting Chair of the Department of Volcanology & Petrology, GEOMAR Research Center.

11/1999-12/2002 Chair of Public Relations Committee, GEOMAR Research Center

1997-1999 IAVCEI Ocean Island Magmatism Commission

Age, geochemistry and origin of intraplate volcanism: on oceanic crust (Canary, Iceland, Madeira, Selvagen, Cape Verde, Hawaiian and Galapagos Islands and seamounts; Marie Byrd and Christmas Island Seamounts; Madeira/Torre Rise and Cocos, Carnegie, Malpelo and Coiba Ridges), continental (Europe and New Zealand) and Large Igneous Provinces or LIPs (Caribbean, Manihiki, Hikurangi, CAMP).

Spatial and temporal evolution of subduction zone magmatism, with emphasis on volatile cycles through subduction zones (Kamchatka, New Zealand, Panama, Costa Rica, Nicaragua, Honduras, El Salvador, Guatemala, Chile, westernmost Mediterannean including southern Spain and northern Morocco and Iran)

Accreted mafic igneous terranes (intraplate, ocean crust and arc) often referred to as ophiolites (Kamchatka, Central America, New Zealand)

Plume-Ridge Interaction (Iceland, Galapagos Spreading Center)

Alteration of Oceanic Crust (Mesozoic crust in the NW Pacific and eastern North Atlantic; young crust near the Australian-Antarctic Discordance)

Opening and closing of marine gateways and landbridges (western Mediterannean, between the North and South America)

• 2-3/2000  William Evans Fellowship; Otago University, Dunedin, New Zealand
• 09/1983 - 12/1984  Deutscher Akademischer Austauschdienst (DAAD) Scholarship to study at the Ruhr University, Bochum, Germany
• 05/1982  B.A. degree with Summa Cum Laude, Columbia University.
• 09/1978 - 05/1982 Dean's List, Columbia University, every semester; Phi Beta Kappa
• 06/1978  Valedictorian, Richmond Academy High School, Augusta, Georgia, U.S.A.

Krolikowska-Ciaglo S, Deyhle A, Hauff F, Hoernle K (accepted with revision) Boron isotope geochemistry of low temperature altered MORB from ODP Leg 187. Chemical Geology:

Sadofsky S, Hoernle K, Hauff F, Werner R, Garbe-Schönberg D (accepted with revision) Trace Element and Sr-Nd-Pb Isotope Geochemistry of the Sedimentary and Upper Igneous Section of the Subducting Cocos Plate Offshore of Central America. Geochemistry Geophysics Geosystems , No , paper #

Hoernle K, and Hauff, F (in press) Oceanic Igneoous Complexes in Central America, in Bundschuh, J., and Avarado, G., eds., Central America: Geology, Resources and Hazards: Lisse, Swets & Zeitlinger Publishers, p.

Portnyagin M, Hoernle K, Plechov P, Mironov N, Khubunaya S (in press) Constraints on mantle melting and composition and nature of slab components in volcanic arcs from volatiles (H2O, S, Cl, F) and trace elements in melt inclusions from the Kamchatka Arc. Earth and Planetary Science Letters.

Portnyagin M, Bindeman I, Hoernle K, Hauff F (in press) Geochemistry of primitive lavas of the Central Kamchatka Depression: Magma Generation at the Edge of the Pacific Plate. AGU Monograph.

Duggen S, Portnyagin M, Baker J, Ulfbeck D, Hoernle K, Garbe-Schönberg D, Grassineau N (2007) Drastic shift in lava geochemistry in the volcanic-front to rear-arc region of the Southern Kamchatkan subduction zone: Evidence for the transition from slab surface dehydration to sediment melting. Geochimica et Cosmochimica Acta 71, 452-480.

Geldmacher J, Hoernle K, Klügel A, van den Bogaard P, Wombacher F, Berning B (2006) Origin and geochemical evolution of the Madeira-Tore Rise (eastern North Atlantic). In: Journal Geophysical Research, v. 111, p. B09206.

Gurenko AA, Hoernle KA, Hauff F, Schmincke H-U, Han D, Miura YN, Kaneoka I (2006) Major, trace element and Nd-Sr-Pb-O-He-Ar isotope signatures of shield stage lavas from the central and western Canary Islands: Insights into mantle and crustal processes; In: Chemical Geology, v. 233, p. 75-112.

Hoernle K, White JDL, van den Bogaard P, Hauff F, Coombs DS, Werner R, Timm C, Garbe-Schönberg D, Reay A Cooper AF (2006) Cenozoic Intraplate Volcanism on New Zealand: Upwelling Induced by Lithospheric Removal. Earth and Planetary Science Letters, v. 248, p. 335-352.

Geldmacher J, Hoernle K, Klügel A, Bogaard Pvd, Duggen S (2006) A geochemical transect across a heterogeneous mantle upwelling: implications for the evolution of the Madeira hotspot in space and time. Lithos, v. 90, p. 131-144.

Kokfelt TF, Hoernle K, Hauff F, Fiebig J, Werner R, Garbe-Schönberg D (2006) Combined Trace Element and Pb-Nd-Sr-O Isotope Evidence for Recycled Oceanic Crust (Upper and Lower) in the Iceland Mantle Plume. Journal of Petrology, DOI 10.1093/petrology/egl025.

Mortimer N, Hoernle K, Hauff F, Palin JM, Dunlop WJ, Werner R, Faure K (2006) New constraints on the age and evolution of the Wishbone Ridge, southwest Pacific Cretaceous microplates, and Zealandia-West Antarctica breakup. Geology, v. 34; no. 3; p. 185–188; doi: 10.1130/G22168.1.

Portnyagin M, Sadofsky S, Hoernle K (2006) Evidence for water-fluxed mantle melting beneath volcanic arcs, Scientific Highlight in: IFM-GEOMAR Yearbook 2005: p.8-9.

Portnyagin MV, Savelyev DP, Hoernle K. (2005) Plume-Related Association of Cretaceous Oceanic Basalts of Eastern Kamchatka: Compositions of Spinel and Parental Magmas. Petrology, Vol. 13, No. 6, 2005, pp. 571–588. Translated from Petrologiya, Vol. 13, No. 6, 2005, pp. 626–645.

Johansen TS, Hauff F, Hoernle K, Klügel A, Kokfelt TF (2005) Basanite to phonolite differentiation within 1550-1750 yr: U-Th-Ra isotopic evidence from the A.D. 1585 eruption on La Palma, Canary Islands: Geology 33:897-900.

Geldmacher J, Hoernle K, Bogaard Pvd, Duggen S, Werner R (2005) New 40Ar/39Ar age and geochemical data from seamounts in the Canary and Madeira Volcanic Provinces: A contribution to the “Great Plume Debate”. Earth and Planetary Science Letters 237: 85-101.

Bindeman I.N., Eiler J.M., Yogodzinski G.M., Tatsumi Y., Stern C.R., Grove T.L., Portnyagin M., Hoernle K., Danyushevsky L.V. (2005) Oxygen isotope evidence for slab melting in modern and ancient subduction zones. Earth and Planetary Science Letters 235: 480-496.

Duggen S, Hoernle K, Bogaard Pvd, Garbe-Schönberg D (2005) Post-collisional transition from subduction- to intraplate-type magmatism in the westernmost Mediterranean at the Miocene-Pliocene boundary: Evidence for continental edge delamination of lithospheric mantle. J. Petrology 46: 1155-1201.

Hoernle K, Werner R, Hauff F, Bogaard Pvd (2005) The Hikurangi Oceanic Plateau: A Fragment of the Largest Volcanic Event on Earth, In: IFM-GEOMAR Yearbook 2002-2004: p.51-54.

Kokfelt TF, Lundstrom C, Hoernle K, Hauff F, Werner R (2005) Plume-ridge interaction studied at the Galapagos spreading center: Evidence from 226Ra-230Th-238U and 231Pa-235U isotopic disequilibria. Earth and Planetary Science Letters, 234(1-2): 165-187.

Krolikowska-Ciaglo S, Hauff F, Hoernle K (2005) Sr-Nd isotope systematics in 14-28 Ma low-temperature altered mid-ocean ridge basalt from the Australian Antarctic Discordance, Ocean Drilling Program Leg 187, Geochemistry Geopysics Geosystems 6(1), Q01001, doi:10.1029/2004GC000802.

Christie D, Werner R, Hauff F, Hoernle K, Hanan B (2005) Morphological and Geochemical Variations Along the Eastern Galapagos Spreading Center. Geochemistry Geophysics GeoSystems 6(1), Q01006, doi:10.1029/2004GC000714.

Portnyagin M, Hoernle K, Avdeiko GP, Hauff F, Werner R, Bindeman I, Uspensky VS, Garbe-Schönberg D (2005) Transition from island-arc to oceanic magmatism at the Kamchatka-Aleutian junction, Geology, v. 33: 25–28.

Harpp KS, Wanless V, Otto R, Hoernle K, Werner R (2005) The Cocos and Carnegie aseismic ridges: A trace element record of long-term plume-spreading center interaction. Journal Petrology 46: 109-133.

Hoernle K, Hauff F, Werner R, Mortimer N (2004) New Insights into the Origin and Evolution of the Hikurangi Oceanic Plateau (Southwest Pacific) from Multi-beam Mapping and Sampling. EOS Transactions AGU Feature 85(41): 401-408.

Hoernle K, Hauff F, Bogaard Pvd (2004) A 70 Myr history (139-69 Ma) for the Caribbean large igneous province. Geology, v. 32: 697-700.

Duggen S, Hoernle K, Bogaard Pvd, Harris C (2004) Magmatic evolution of the Alboran Region: The role of subduction in forming the western Mediterranean and causing the Messinian Salinity Crisis. Earth and Planetary Science Letters 218: 91-108.

Werner R, Hoernle K, Barckhausen U, Hauff F (2003) Geodynamic evolution of the Galápagos hot spot system (Central East Pacific) over the past 20 m.y.: Constraints from morphology, geochemistry, and magnetic anomalies. Geochemistry Geophysics GeoSystems 4(12), 1108, DOI 10.1029/2003GC000576.

Werner R, Hoernle K (2003) New volcanological and volatile data confirm the hypothesis for the continuous existence of Galápagos Islands for the past 17 m.y.. Int. J. Earth Sci. 92, no 6:.904 - 911, DOI 10.1007/s00531-003-0362-7.

Lundstrom CC, Hoernle K, Gill J (2003) U-series disequilibria in volcanic rocks from the Canary Islands: plume versus lithospheric melting. Geochim et Cosmochim Acta 67, No. 21: 4153-4177.

Kokfelt T, Hoernle K, Hauff F (2003) Upwelling and melting of the Iceland plume from radial variation of 238U-230Th disequilibria in postglacial volcanic rocks. Earth and Planetary Science Letters 214: 167-186.

Hauff F, Hoernle K, Schmidt A (2003) The Sr-Nd-Pb composition of Mesozoic Pacific oceanic crust (Site 1149 and 801, ODP Leg 185): Implications for alteration of ocean crust and the input into the Izu-Bonin-Mariana subduction system. Geochemistry Geophysics Geosystems 4, No 8, paper # 8913, doi:10.1029/2002GC000421.

Hoernle K, Mortimer N, Werner R, Hauff F (Eds.) (2003) FS SONNE Fahrtbericht/Cruise Report SO168. Zealandia (Causes and effects of plume and rift-related Cretaceous and Cenozoic Volcanism on Zealandia). GEOMAR Report 133: 127 pp + app (http://www.geomar.de/projekte/zealandia/english/CR_SO168.pdf).

Geldmacher J, Hanan BB, Blichert-Toft J, Harpp K, Hoernle K, Hauff F, Werner R, Kerr AC (2003) Hafnium isotopic variations in volcanic rocks from the Caribbean Large Igneous Province and Galápagos hotspot tracks. Geochemistry Geophysics Geosystems 4, No 7, paper # 1062,doi:10.1029/2002GC000477.

Duggen S, Hoernle K, Bogaard Pvd, Rüpke L, Phipps-Morgan J (2003) Deep Roots of the Messinian Salinity Crisis. Nature 422: 602-606.

Hoernle K, Agouzouk A, Berning B, Buchmann T, Christiansen S, Duggen S, Geldmacher J, Hoffmann L, Imholz P, Kahl G, Kaiser A, Kischkies S, Klügel A, Löffler S, Mouloudj M, Muinos S, Neufeld S, Ochsenhirt WT, Rechlin A, Reicherter K, Rodrigues D, Schwarz S, Steinborn W, Vetter S, Werner R, Wohlgemuth-Ueberwasser C (2003) Cruise Report M51/Leg 1 in: Meteor Berichte 03-1 „Ostatlantik-Mittelmeer-Schwarzes Meer“ Part 1, Inst. f. Meereskunde Univ. Hamburg, Hamburg.

Hoernle KA, Tilton G, Le Bas M, Duggen S, Garbe-Schönberg D (2002) Geochemistry of oceanic carbonatites compared with continental carbonatites: mantle recycling of oceanic crustal carbonate. Contrib. Mineral. Petrol. 142, 520-542.

Hoernle KA, Bogaard Pvd, Werner R, Lissinna B, Hauff F, Alvarado G, Garbe-Schönberg D (2002) The Missing History (16-71 Ma) of the Galápagos Hotspot: Implications for the Tectonic and Biological Evolution of the Americas Geology 30: 795-798.

Baranov BV, Werner R, Hoernle KA, Tsoy I, Bogaard Pvd, Tararin I (2002) Evidence for Compressionally-Induced High Subsidence Rates in the Kurile Basin (Okhotsk Sea). Tectonophysics 350: 63-97.

Geldmacher J, Hoernle KA, Bogaard PvD, Zankl G, Garbe-Schönberg D (2001) Earlier history of the ≤70-Ma-old Canary hotspot based on the temporal and geochemical evolution of the Selvagen Archipelago and neighboring seamounts in the eastern North Atlantic, JVGR 111: pp 55-87.

Klügel A, Hoernle KA, Schmincke HU, White JDL (2000) The chemically zoned 1949 eruption on La Palma (Canary Islands): Petrologic evolution and magma supply dynamics of a rift-zone eruption. J Geophys Res 105: 5997-6016.

Hoernle KA, Werner R, Phipps Morgan J, Bryce J, Mrazek J (2000) Existence of a complex spatial zonation in the Galápagos plume for at least 14.5 Ma. Geology 28: 435-438.

Hauff F, Hoernle KA, Tilton G, Graham D, Kerr AC (2000): Large volume recycling of oceanic lithosphere: Geochemical Evidence from the Caribbean Large Igneous Province. Earth Planet Sci Lett 174: 247-263.

Hauff F, Hoernle KA, Bogaard Pvd, Alvarado GE, Garbe-Schönberg D (2000) Age and Geochemistry of Basaltic Complexes in Western Costa Rica: Contributions to the Geotectonic Evolution of Central America. Geochemistry Geophysics Geosystems 1, paper # 1999GC000020.

Geldmacher J, Hoernle KA (2000) The 72 Ma Geochemical Evolution of the Madeira Hotspot (eastern North Atlantic): Recycling of Palaeozoic (≤500 Ma) Oceanic Crust. Earth and Planetary Science Letters 183: 73-92 , Corrigendum in EPSL 186, 333 (2001).

Geldmacher J, Bogaard Pvd, Hoernle KA, Schmincke HU (2000) Ar age dating of the Madeira Archipelago and hotspot track (eastern North Atlantic). Geochemistry Geophysics Geosystems 1, paper number 1999GC000018.

Widom E, Hoernle K, Shirey SB, Schmincke H-U (1999) Os isotope systematics in the Canary Islands and Madeira: Lithospheric contamination and mantle plume signatures. Journal of Petrology 40(2): 279-296

Werner R, Hoernle K, Bogaard Pvd, Ranero C, Huene vR, Korich D (1999) A drowned 14 Ma old Galápagos Archipelago off the coast of Costa Rica: Implications for evolutionary and tectonic models. Geology 27: 499-502

Hoernle K, Bogaard Pvd, Mocek B, Garbe-Schönberg D (1999) Evidence for Miocene subduction beneath the Alboran Sea (Western Mediterranean) from 40Ar/39Ar age dating and the geochemistry of volcanic rocks from holes 977A and 978A. Scientific Results of the Proceedings of ODP Leg 161 Scientific Results: 357-373

Klügel A, Schmincke HU, White JDL, Hoernle KA (1999) Chronology and volcanology of the 1949 multi-vent rift-zone eruption on La Palma (Canary Islands). Journal of Volcanology and Geothermal Research 94: 267-282

Schmincke H-U, Klügel A, Hansteen TH, Hoernle K, Bogaard Pvd (1998) Samples from the Jurassic ocean crust beneath Gran Canaria, La Palma and Lanzarote (Canary Islands). Earth Planetary Science Letters 163: 343-360.

Hoernle K (1998) Geochemistry of Jurassic oceanic crust beneath Gran Canaria (Canary Islands): Implications for crustal recycling and assimilation. Journal of Petrology 39(5): 859-880.

Hauff F., Hoernle K., Schmincke H.-U. & Werner R. (1997) A Mid Cretaceous Origin for the Galápagos Hotspot: Volcanological, Petrological, and Geochemical Evidence from Costa Rican Oceanic Crustal Segments. Geol Rundsch 86: 141 - 155.

Zuleger E, Sachs PM, Hoernle K, Werner R, Lechtenberg F (1997) Isotopen- und Spurenelementuntersuchungen von geologischen Systemen. Geowissenschaften 9: 306 - 309.

Schmincke H-U, Freundt A, Rihm R, Sumita M, Krastel S, Hoernle K (1997) Vulkaninseln als ozeanische Geosysteme. Geowissenschaften 9: 301-305.

Hoernle K, Aarburg S, Cruz V, Duggen S, Geldmacher J, Hauff F, Neu B, Werner R, Wienecke M, Zankl G (1997) Cruise Report Poseidon 235, Institut für Meereskunde, Kiel.

Hoernle K., Zhang, Y.-S., Graham, D. (1995) Seismic and geochemical evidence for large-scale mantle upwelling beneath the eastern Atlantic and western and central Europe, Nature 374, 34-39.

Hoernle K., Schmincke, H-U. (1993) The role of partial melting in the 15 Ma geochemical evolution of Gran Canaria: a blob model for the Canary hotspot. Journal of Petrology 34, Part 3: 599-626.

Hoernle K., Schmincke, H-U. (1993) The petrology of the tholeiites through melilite nephelinites on Gran Canaria, Canary Islands: crystal fractionation, accumulation and depths of melting. Journal of Petrology 34, Part 3: 573-597.

Hoernle K., Tilton, G., Schmincke, H-U. (1991) Sr-Nd-Pb isotopic evolution of Gran Canaria: evidence for shallow enriched mantle beneath the Canary Islands. Earth and Planet. Sci. Lett. 106, 44-63.

Hoernle K., Tilton, G. (1991) Sr-Nd-Pb isotope data for Fuerteventura (Canary Islands) basal complex and subaerial volcanics: applications to magma genesis and evolution. Schweiz. Mineral. Petrogr. Mitt. 71, 5-21.

Hoernle K (1990) The major element, trace element and Sr-Nd-Pb isotopic evolution of Gran Canaria (Canary Islands) magma sources over the past 15 m.y.: Inferences on the geochemical and structural evolution of the mantle. Ph.D. dissertation, University of California, Santa Barbara, 140 p.

Mozley, P., Hoernle K. (1990) Geochemistry of carbonate cements in the Sag River and Shublik Formations (Triassic/Jurassic), North Slope, Alaska: implications for the geochemical evolution of formation waters. Sedimentology 37: 817-836.