Mitarbeiter
Prof. Kaj Alexander Hoernle
Forschungsbereich 4: Dynamik des Ozeanbodens
FE Magmatische und hydrothermale Systeme
Arbeitsgruppe Petrologie und Geochemie (MuHS-P)
Leiter der Gruppe
Büro:
Raum: 8/D-208
Telefon: +49 151 24 008 809 (Arbeit)
E-Mail: khoernle(at)geomar.de
Adresse:
Wischhofstrasse 1-3
24148 Kiel
Ausbildung
06/1990 Ph.D., Geochemistry, University of California, Santa Barbara, USA.
03/1987 M.A., Petrology, University of California, Santa Barbara, USA.
05/1982 B.A., Geology, Columbia University, New York City, USA.
Berufserfahrung
2015-present Professor, Petrology/Geochemistry at Christian-Albrechts University Kiel (CAU) and GEOMAR Helmholtz Center for Ocean Research.
1994-2015 Associate Professor Petrology/Geochemistry, CAU and GEOMAR.
8/2014-2/2015 Visiting Fellow/Honorary Associate, Depart. of Earth and Planetary Sciences, Macquarie University, NSW, Australia
08/09-7/10 Adjunct Prof., Earth and Ocean Sciences, Univ. South Carolina, USA
1993-1994 Assistant Research Scientist & Lecturer, Marine Sciences Institute and Dept. of Geological Sciences, Univ. of California, Santa Cruz (UCSC).
1991-1993 Postdoctoral Researcher, Univ. of California, Santa Cruz (UCSC).
1990-1991 Postdoctoral Researcher, Univ. of California, Santa Barbara (UCSB).
Führungspositionen
1994-present Head of GEOMAR Research Group for Petrology and Geochemistry (MUHS-P)
1995-present Head of the GEOMAR radiogenic isotope (Sr, Nd, Hf, Pb double spike and U-series) facilities for igneous rocks
2017-present Co-Head of the GEOMAR Drone Group (Unmanned Aerial Vehicle - UAV)
2012-2020 Spokesperson for the Helmholtz Scientific Program “OCEANS: From the Deep Sea to the Atmosphere”
2006-2012 Chair of Collaborative Research Center SFB574 “Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters” at Kiel University and IFM-GEOMAR Leibniz Institute of Marine Sciences.
2010-2011 Chair Research Division 4 “Dynamics of the Ocean Floor” at IFM-GEOMAR Leibniz Institute of Marine Sciences
2007-2010 Assistant Chair of Research Division 4 “Dynamics of the Ocean Floor”, IFM-GEOMAR Leibniz Institute of Marine Sciences
1999-2007 Assistant Director of IFM-GEOMAR Leibniz Institute of Marine Sciences and GEOMAR Research Center for Marine Geosciences (before 2004)
2003-2004 Chair of Volcanology and Petrology / Research Division 4, GEOMAR Research Center and IFM-GEOMAR Leibniz Institute
1999-2002 Chair Public Relations Committee, GEOMAR Research Center
Berufliche Tätigkeiten und Forschung
2006-2019 Member and one of the lead proponents for both phases of the Cluster of Excellence “Future Ocean”
1/2015 Sabbatical research visit at Institute for Marine and Antarctic Studies (IMAS) and University of Tasmania, Australia
7/2014-2/2015 Sabbatical research visit at Department of Earth and Planetary Sciences, Macquarie University, Australia
12/2013 Co-convener of GeoPRISMS Kermadec/Havre Trough and co-organizer of Aleutians Logistics Workshops held before fall AGU in San Francisco
2006-2012 Host/Organizer of annual SFB574 “Fluids and volatiles in subduction zone” scientific workshops
08/2009-7/2010 Sabbatical research visit at the Department of Earth and Ocean Sciences, University of South Carolina, U.S.A.
2006-2010 Geochemistry, Geophysics, Geosystems (G3) (Guest Editor for the Central American Subduction Theme volume)
2006-2009 Member of the Hotspot Geodynamics Detailed Planning Group (DPG) established by the IODP Science Planning Committee (SPC)
4/2007 Co-Organizer of the Latin America Colloquium in Kiel
6/2007 Co-Organizer of U.S. MARGINS and GERMAN SFB574 Workshop to integrate subduction factory and seismogenic zone studies in Central America, Heredia, Costa Rica.
1995-2006 International Journal of Earth Sciences/Geologische Rundschau (Editorial Board
2002-2005 Journal of Volcanology and Geothermal Research (Editorial Board)
2001-2004 Member, Inter-Ridge Work Group “Ridge-Hotspot Interactions”
01-03/2001 Sabbatical research visit at the Geology Department, University of Otago, Dunedin, New Zealand
1997-1999 IAVCEI Ocean Island Magmatism Commission
Auszeichnungen
2021 American Geophysical Union (AGU) Fellow
2021 Member of the European (EU) Academy of Sciences
2020 Socio Correspondiente (Corresponding Member) of the Argentinean Geological Association for important advances in Argentinean geology.
2018 Gustav-Steinmann Medal of the German Geological Society (DGGV) for outstanding overall achievements in the geological sciences.
2014 University of California, Santa Barbara (UCSB) Earth Science Distinguished Alumni Award.
2000 William Evans Fellowship, Otago University, Dunedin, New Zealand
1983-1984 German Academic Exchange (DAAD) Scholarship to study at the Ruhr University, Bochum, Germany.
1982 B.A., summa cum laude, Columbia University, U.S.A.
1978-1982 Dean’s List, Columbia University, every semester & Phi Beta Kappa
Einige meiner wissenschaftlichen Hauptinteressen (und Studienbereiche)
- Temporal and spatial evolution of intraplate volcanism: ocean island and seamount volcanoes and aseismic volcanic ridges (Canary, Iceland, Madeira, Selvagen, Cape Verde, Hawaiian, Tristan/Gough and Galapagos Islands and associated seamounts and ridges; Marie Byrd, submarine Zealandia, Discovery, Agulhas Fracture Zone and Christmas Island Seamounts; Madeira/Torre Rise and Cocos, Carnegie, Malpelo, Coiba and Walvis Ridges), continental intraplate volcanism (Europe, New Zealand and western U.S.) and oceanic plateaus or Large Igneous Provinces = LIPs (Caribbean, Ontong Java, Manihiki, Hikurangi, Shatsky, Etendeka).
- Subduction zone magmatism, including arc initiation, temporal and spatial evolution of arc volcanism and volatile cycles through subduction zones (Kamchatka, Aleutians, Central America from Panama to Guatemala, Chile, Argentina, Tonga-Kermadec Arc, Iran, westernmost Mediterranean including southern Spain and northern Morocco, Izu-Bonin)
- Hazards related to intraplate and subduction zone volcanism (e.g. Etna, Stromboli, Iceland, Canary Islands, Central America, Chile, Kamchatka, Aleutians)
- Mid-ocean Ridge Volcanism and Plume-Ridge Interaction (Iceland, Galapagos Spreading Center, East Pacific Rise, Southern Mid-Atlantic Ridge, Woodlark)
- Evolution and Origin of Ocean Crust (Early Cenozoic to Mesozoic crust in the NW Pacific, eastern North Atlantic, NE Indian Ocean and accreted to North Island New Zealand; young crust outboard Central America, including Site 1256 first location where in situ gabbros were drilled)
- Opening and closing of marine gateways and landbridges (western Mediterranean, Central American)
- Evolution of Origin of Continental Crust (Central America, Aleutians, North China Craton, Iceland, northern Chile)
- Resources related to volcanic systems (e.g. contents of precious metals such as gold and silver in volcanic glasses)
Erfahrungen und Interessen im Bereich Bildung und Lehre
Teaching Interests
I have taught a wide array of courses in both English and German at Columbia University in N.Y.C. (Paleontology Laboratory), University of California Santa Barbara (Oceanography Laboratory, Rock Identification, Summer Field Mapping Courses, Introduction to Geology), University of California Santa Cruz (Seminars on Isotope Geochemistry), and Kiel University (Introduction to Geochemistry, Magmatic Processes and Plate Tectonics, Geochronology and Isotope Geochemistry, Introduction to the Geochemistry of Igneous Rocks, Origin and Evolution of the Solar System, laboratory course on Radiogenic Isotope Analyses, geologic mapping courses, and seminars covering a wide array of topics including natural hazards, relationship between volcanism and climate, igneous petrology, geochemistry, application of geophysical techniques to understanding magmatic systems, and geodynamics).
Diversity and Gender
As my record shows, both diversity and gender balance are important to me. I believe all people, regardless of race, gender, religion, age, financial status or handicaps, should be treated equally, have the right to an advanced education, and to participate in basic and applied research. My Masters/PhD students and postdocs have come from 11 different countries (Germany, USA, China, France, Poland, New Zealand, Denmark, Russia, Switzerland, Spain, India and Iran). In addition, I have hosted visiting scientists from NZ, Costa Rica, Morocco, USA, Australia and Iran. Of my Masters and PhD students (who have received their degrees) and postdocs, approximately half (29 of 59) have been women. The Collaborative Research Center, during the six years I led it, had research going on throughout Central America (Panama, Costa Rica, Nicaragua, Honduras, El Salvador and Guatemala) and in Chile and Argentina. We forged tight relationships with our Latin America partners, which included hosting a Latin America Colloquium at Kiel University and a joint German-US-Central American meeting in Costa Rica. As Deputy Director and Scientific Program Speaker, I fought to increase both the diversity and the number of women at GEOMAR. These were important areas under review during the evaluation of the institute and the program, which received excellent to outstanding ratings. As a result of doing fieldwork with colleagues or spending time together on ship cruises, one gains intimate insights into different countries, peoples and cultures. This is one of the highlights of being a geologist for me.
Primary Advisor of Following Doctoral (Ph.D.) Degrees
Below are listed the completed and on-going doctoral degrees for which I was the primary advisor. I have co-supervised a similar number of doctoral students that are not listed.
1) Folkmar Hauff (1998) Age and Geochemical Constraints on the Origin of Oceanic Basement Complexes in Costa Rica and the Caribbean Large Igneous Province. Dissertation. Christian Albrechts University of Kiel (CAU).
2) Joerg Geldmacher (2000) Temporal and geochemical evolution of the Madeira and Selvagen Islands and associated seamounts (eastern North Atlantic): Implications for the size and structure of mantle plumes. Dissertation. CAU.
3) Angelika Schmidt (2001) Temporal and Spatial Evolution of the Izu Island Arc, Japan in Terms of Sr-Nd-Pb Isotope Geochemistry. Dissertation. CAU.
4) Svend Duggen (2002) Spatial and temporal geochemical evolution of igneous rocks in the Alborán Region (westernmost Mediterreanean): Implications for the origin of Mediterranean-style back-arc basins and the Messinian Salinity Crisis. Dissertation. CAU.
5) Sylwia Krolikowska (2005) The chemical and isotopic composition of the low temperature altered MORB from the Australian Antarctic Discordance. Dissertation. CAU.
6) Britta Lissinna (2005) A profile through the Central American landbridge in western Panama: 115 Ma interplay between the Galapagos Hotspot and the Central American Subduction Zone. Dissertation. CAU.
7) Christian Timm (2008) The Origin of Intraplate Volcanism on the New Zealand micro-continent Zealandia Dissertation. CAU.
8) Ken Heydolph (2010) Spatial variations in the geochemistry of arc volcanism in Central America. Dissertation. CAU.
9) Joana Rohde (2013) Geochronology and Geochemistry of the Tristan-Gough Hotspot Track. Dissertation. CAU.
10) Guillaume Jacques (2013) Causes of along- and across-arc geochemical variations in the Southern Volcanic Zone (33°-43°S) in Chile and Argentina. Dissertation. CAU.
11) Andrea Kipf (2014) Enigmatic Intraplate volcanism: A geochronological and geochemical approach for the Marie Byrd Seamounts (Antarctica) and the Christmas Island Seamount Province (Indian Ocean). Dissertation. Christian Albrechts University of Kiel.
12) Tobias W. Höfig (2014) Geochemical (major and trace elements and Sr-Nd-Hf-Pb isotopes) characterization of the upper oceanic crust (sediments to gabbros) at ODP/IODP Site 1256 in the eastern Central Pacific (Doktorarbeit/PhD), Christian-Albrechts-Universität Kiel, Kiel, Germany, 147 pp
13) Antje Herbrich (2015) SO208 PLUMEFLUX - Distribution of Galápagos plume material in the equatorial East Pacific Ocean (Doktorarbeit/PhD), Christian-Albrechts-Universität, Kiel.
14) Roman Golowin (2017) Geochemistry of the upper Manihiki Plateau basement: Implications for complex geochemical processes during melting of heterogeneous mantle plume sources in oceanic intra-plate settings (CAU).
15) Nadine Schattel (2017) Silicic magma origin and its relation to different tectonic settings on Iceland (CAU).
16) Christina Bonanati (2017) Tephra in marine sediments offshore southern Iceland: A 68,000 year volcanic record (CAU).
17) Stephan Homrighausen (2017) The older history of the Tristan-Gough hotspot system: Walvis Ridge and Rio Grande Rise (CAU).
18) Antje Dürkefälden (2019) Insights into the origin and evolution of intraplate magmatism in the Caribbean (initial stage of the Galápagos hotspot) and the South Atlantic (Discovery and Shona hotspot tracks) (CAU).
19) Xiaojun Long (2019) The origin of diverse intraplate volcanism in the Central and Equatorial Atlantic Ocean. (PhD/ Doctoral thesis), Christian-Albrechts-Universität, Kiel, Germany, XII, 253 pp.
20) Hongpu Zhou (2021) Geochemistry of the Etendeka Flood Basalts and related alkaline and carbonatitic volcanism, Namibia (CAU).
21) Samuel Mueller (expected 2022) Formation and alteration processes of oceanic crust. Examples from the Oman Ophiolite (CAU).
22) Avrinder Sandhu (expected 2023) Geochemistry of the backarc basin rift systems (CAU).
Primary Advisor of the following Masters (formerly Diploma) Theses:
1) Susanne Dorn (1997) Die geochemische Entwicklung einer Intraplatten-Vulkaninsel am Beispiel von La Gomera / Kanarische Inseln. Diplomarbeit. Diploma (equivalent to Masters) Thesis, Christian Albrechts University of Kiel (CAU).
2) Beate Wenskowski (2000) The Role of Recycled Oceanic Crust in the Genesis of the Arc Melts, Northern Kurile Arc/Die Rolle von recycelter ozeanischer Kruste bei der Bildung von Schmelzen im nördlichen Kurilen-Inselbogen. Diploma (equivalent to Masters) Thesis, CAU.
3) Svend Duggen (1998) Evidence for a Miocene volcanic arc in the Alboran Sea (westernmost Mediterranean): Geochemistry of submarine volcanic rocks. Diploma Thesis, CAU, Kiel.
4) Miriam Rehder (2004) “The origin of submarine volcanism on the Chatham Rise, New Zealand – A model based on geochemical data”. Diploma Thesis, CAU, Kiel.
5) Ken Heydolph (2005) Petrology of the Campbell Plateau and geochemical evolution of the Dunedin Volcano. Diploma Thesis, CAU, Kiel.
6) Sonja Storm (2007) Genesis of silicic magmas in Iceland: Significance for crustal formation. Diploma Thesis, CAU, Kiel.
7) Julia Mahlke (2009) Geochemical evolution of Llaima and Villarrica Volcanoes, Central Chile. Diploma Thesis, CAU, Kiel.
8) Joana Deppe (2009) Geochemical variations along the Gough-Tristan seamount tracks. Diploma Thesis, CAU, Kiel.
9) Sarah Conrad (2012) Petrology, Geochemistry and Geochronology of the Christmas Island Volcanic Series: Insights into the complex evolution of ocean islands. Diploma Thesis, CAU.
10) Maren Wanke (2012) The Origin of the Bowers and Shirshov Ridges (Bering Sea, NW Pacific). Diploma Thesis, CAU, Kiel.
11) Roman Golowin (2012) Major, trace elements and volatiles in meld inclusions in minerals from the 1362 AD Öraefajökull erpution (Iceland): Implications for the origin of a large volume homogeneous rhyolitic magma in Iceland (Master thesis), CAU, Kiel, 73 pp.
12) Nadine Schattel (2012) The 1875 Askja eruption on Iceland: magma storage conditions, mixing and regime of volatiles inferred from melt inclusions in plagioclase and pyroxene (Master thesis), CAU, Kiel, 61 pp.
13) Paulina Hoffmann (2013) Petrography, Major and Trace Element Geochemistry of the Discovery Seamounts (Master thesis), CAU, Kiel, 66 pp.
14) Anna Hauschild (2013) Volcanic Basement north of the Hess-Escarpment (Central Caribbean): A piece of the Caribbean Large Igneous Province? Diploma Thesis, Christian-Albrechts-Universität zu Kiel, 42 pp.
15) Svea Amrei Ladwig (2016) Partitioning of major and trace elements between crystals and melts for high-Al basalts from Tolbachik volcanic field, Kamchatka. Masters thesis CAU, Kiel, 61 pp.
16) Robert Seidel (2016) The ~12.1 ka BP Vedde Ash: Pre-eruptive P-T-H2O-constraints and Identification of Primary Tephra Layers. Masters thesis CAU, Kiel.
17) Steffen Koch (2018) Major and trace element geochemistry of the NW Pacific seafloor from R/V Sonne 249 cruise samples. Masters CAU, Kiel.
18) Gesine Gerke (2018) Major and trace element geochemistry of lavas recovered on R/V Sonne SO249 cruise from submarine canyons cutting the basement of the Aleutian Arc. Masters CAU, Kiel.
19) Phillip Kosbü (2018) Magma chamber dynamics beneath Nea Kameni volcano, Greece, revealed by composition of minerals and melt inclusions from submarine lava flows. Masters CAU, Kiel.
20) Thorsten Lück (2020) Late-stage evolution of Shatsky Rise oceanic plateau: Insights from major and trace element composition of volcanic rocks from submarine Papanin Ridge. Masters CAU, Kiel
Postdoctoral Researchers Funded through my Research Grants (unless otherwise noted)
1) Dr. Reinhard Werner (1996-2011)
2) Dr. Folkmar Hauff (1999)
3) Dr. Thomas Kokfelt (2000-2005)
4) Dr. Maxim Portnyagin (2001-2011, 50% soft money funded until 2018)
5) Dr. Seth Sadofsky (2003-2007)
6) Dr. Jörg Geldmacher (2004)
7) Dr. Svend Duggen (2006-2009)
8) Dr. Christian Timm (2008-2010)
9) Dr. Heidi Wehrmann (2008-2016)
10) Dr. Ken Heydolph (2011-2013)
11) Dr. David Buchs (2011-2013) – funded through the Swiss Research Foundation
12) Dr. Nina Soager (2013-2015) – funded through the Danish Research Council
13) Dr. Guillaume Jacques (2013-2016)
14) Dr. Karen Strehlow (2016-)
15) Dr. Rachel Bezard (2017-2018)
16) Dr. Ester Muñoz-Jolis (2017-2018)
17) Dr. Christina Bonanati (2017)
18) Dr. Stephan Homrighausen (2018-2022)
19) Dr. Antje Dürkefälden (2018-2021)
Visiting Scientists (for longer than 1 month)
1) Vanessa Tappenden (PhD student; University of Canterbury, Christchurch, New Zealand; 03. 99-02. 00; DAAD Stipend)
2) Mohammadreza Irannezhadi (PhD student; Isfahan University of Technology, Iran; 01.10.06-01.02.07; Iranian Ministry of Industries and Mines Stipend)
3) Prof. Mohammed Bouabdellah (Geological Institute, University of Oujda, Oujda, Marocco, 01.11.-04.12.07; DAAD Senior Research Award
4) Estevan Gazel Donde (PhD student; Rutgers Univ., USA; ~6 months, 2 visits between 2006-2009; Collaborative Research Center SFB574 Grants)
5) Prof. James Gill (Univ. of California Santa Cruz, USA; ~1yr visit between 2012-15; von Humboldt Research Prize)
6) Prof. Simon Turner (Macquarie Univ., Sydney; ~10 month visit between 2014-17; von Humboldt Research Prize)
7) Prof. Dietmar Müller (Univ. of Sydney; 06.-07.19; 20th Excellence Prof Award)
8) Prof. Hady Shafaii Moghadam (School of Earth Sciences; Damghan University, Tehran, Iran; 08.19-08.20; Alexander von Humboldt Fellow)
Forschungsfahrten und Expeditionen
- Chief scientist of 9 research cruises and lead proponent on >20 successful research cruise proposals carried out by my research group with RV Sonne, RV Meteor, RV Maria S. Merian and RV Poseidon in the Atlantic, Pacific and Indian Oceans and in the Caribbean, Mediterranean and Bering Seas
- Co-chief scientist of IODP391 Expedition Walvis Ridge Hotspot (06.12.21-05.02.22)
- Carried out more than 50 field expeditions, including: New Zealand, Australia, U.S.A., Central America (Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, Panama), Chile and Argentina, Morocco, Namibia, Cape Verde Islands, Europe (Germany, Spain, Iceland, Portugal, Italy, Greece), Curacao, Russia and China.
Publikationen
- >175 peer-reviewed publications
- H-Index = 67, ~13,600 citations (Google Scholar, June 2022); H-Index = 58, ~9400 citations (Web of Science, June 2022)
- 9 Nature and one Science Journal publications (4 first-authored)
- >100 Abstracts in the last 10 years (at http://oceanrep.geomar.de/cgi/search/advanced)
- Numerous invited and keynote talks at international conferences (e.g. AGU, Goldschmidt, Chapman, Penrose, Latin America Colloquium, DGGV) and at Universities and other organizations (e.g. Univ. of Buenos of Aires, Namibian Geological Society, Lamont-Doherty Earth Observatory, Univ. of South Carolina, Univ. of Erlangen in Germany, Michigan State Univ., Macquarie Univ. in Sydney, Institute for Marine and Antarctic Studies in Hobart, Univ. of Sydney, Ludwig Maximilians Universität in Munich) on topics related to intraplate, convergent margin and divergent margin volcanism and geodynamics (at http://oceanrep.geomar.de/cgi/search/advanced)
Articles in a Scientific Journal - peer-reviewed
Book chapters