AG Petrology of the Ocean Crust

Room 5070

Department of Geosciences
University of Bremen
Klagenfurter Straße 4
28359 Bremen
Germany

Phone: +49 421 218 65408
Fax: +49 421 218 65429
Email: wakahl@uni-bremen.de

Wolf-Achim Kahl


Research

Experimental investigations concerning the coupling of reaction progress and permeability
(Reinhart Koselleck Projekt)

  • combined experimental simulation and µ-CT observations

Peridotite-seawater interactions in different submarine geotectonic settings

  • investigation of rock samples from Mariana forearc and Mid-Atlantik Rigde

High-pressure Dehydration of Serpentinite and its Implications for Subduction Processes: insights from Exhumed Metamorphic Terrains
  • correlative X-ray µ-CT and EBSD analyses



Curriculum vitae


Scientific career

since Oct. 2012 Post-doctoral research fellow in a Reinhart Koselleck Project with Prof. Dr. W. Bach, University of Bremen, Germany
  • setup and management of the X-ray µ-CT laboratory
  • development and construction of an X-ray transparent flow-through apparatus to investigate water-rock interactions
2011
-2012
Post-doctoral research fellow in the Schwerpunktprogramm "Integrated Ocean Drilling Program" with Prof. Dr. W. Bach, University of Bremen, Germany
2007
-2011
Post-doctoral research fellow in the joint research project CO2-MoPa "Modelling and parameterisation of CO2-sequestration" with Prof. Dr. A. Holzheid, University of Kiel, Germany
  • setup and management of the µ-CT laboratory
2004
-2007
Post-doctoral research fellow R&D Cooperation "Automotive catalysts" with Dr. U. Klein, Umicore AG & Co. KG, Hanau; Germany and Prof. Dr. V. Schenk, University of Kiel, Germany
  • preparation of precious metal-bearing catalysts for XRF analysis
July 2000 Dr. rer. nat. in Mineralogy
1996
-2000
Doctorate studies, University of Bochum, Germany
  • setup of the High-temperature Solution-Calorimeter and DSC
  • thesis supervisor: Prof. Dr. Walter Maresch
Jan. 1996 Diploma in Mineralogy
1988
-1996
Studies in mineralogy, University of Kiel, Germany
  • supervisor of diploma thesis: Dr. John Schumacher

Synergistic activities

  • Webmaster of the International Confederation for Thermal Analysis and Calorimetry (ICTAC, http://www.ictac.org) since 2011

  • 2010: Appointment as Radiation Safety Official at the Institute for Geosciences Kiel, Germany

  • Webmaster of the German Society of Thermal Analysis (GEFTA, http://www.gefta.org) and guest of the board since 2004

  • Additional qualifications

    • 2009 Requisite qualification courses (Fachkundegruppen R2, R3, R4, R10) in radiation protection according to the German National X-Ray Ordinance at the Norddeutsches Seminar für Strahlenschutz, Kiel
    • IT skills Webdesign (HTML, PHP, mysql), application design (java, VB), databases



    Publications


    Publications (peer-reviewed)

    Wisshak, M., Titschack, J., Kahl, W.-A., and Girod, P. (2017): Classical and new bioerosion trace fossils in Cretaceous belemnite guards characterised via micro-CT, Foss. Rec., 20, 173-199.
    doi:10.5194/fr-20-173-2017 |

    Kahl, W.-A., Dilissen, N., Hidas, K., Garrido, C. J., López-Sánchez-Vicaíno, V. and Román-Alpiste, M. J. (2017): 3-D microstructure of olivine in complex geological materials reconstructed by correlative X-ray µ-CT and EBSD analyses. Journal of Microscopy.
    doi:10.1111/jmi.12598 |

    Jöns, N., Kahl, W.-A., and Bach, W. (2017): Reaction-induced porosity and onset of low-temperature carbonation in abyssal peridotites: insights from 3D high-resolution microtomography. Lithos, 268-271, 274-284.
    doi:10.1016/j.lithos.2016.11.014 |

    Kahl, W.-A., Hansen, C., and Bach, W. (2016) A new X-ray-transparent flow-through reaction cell for a μ-CT-based concomitant surveillance of the reaction progress of hydrothermal mineral–fluid interactions. Solid Earth, 7, 651-658.
    doi:10.5194/se-7-651-2016 |

    Soltan, A.M.M., Kahl, W.-A., Abd EL-Raoof, F., Abdel-Hamid El-Kaliouby, B., Abdel- Kader Serry, M., Abdel-Kader, N.A. (2016) Lightweight aggregates from mixtures of granite wastes with clay. Journal of Cleaner Production, 117, 139-149.
    doi: 10.1016/j.jclepro.2016.01.017 |

    Kahl, W.-A., Jöns, N., Bach, W., Klein, F., Alt, J.C. (2015) Ultramafic clasts from the South Chamorro serpentine mud volcano reveal a polyphase serpentinization history of the Mariana forearc mantle. Lithos, 227, 1-20.
    doi:10.1016/j.lithos.2015.03.015 |

    Klein, F., Grozeva, N.G., Seewald, J.S., McCollom, T., Humphris, S.E., Moskowitz, B., Berquó, T.S. & Kahl, W.-A. (2015) Experimental constraints on fluid-rock reactions during incipient serpentinization of harzburgite. American Mineralogist, 100, 991-1002.
    doi: 10.2138/am-2015-5112 |

    Klein, F., Bach, W., Humphris, S.E., Kahl, W.-A., Jöns, N., Moskowitz, B. & Berquó, T.S. (2014) Magnetite in seafloor serpentinite−−Some like it hot. Geology 42(2), 135-138.
    doi: 10.1130/G35068.1 |

    Kahl, W.-A., Hinkes, R., Feeser, V. & Holzheid, A. (2013) Microfabric and anisotropy of elastic waves in sandstone - An observation using high-resolution X-ray microtomography. Journal of Structural Geology, 49, 35-49.
    doi: 10.1016/j.jsg.2013.01.006 |

    Kiel, S., Kahl, W.-A. & Goedert, J. L. (2013) Traces of the bone-eating annelid Osedax in Oligocene whale teeth and fish bones. Paläontologische Zeitschrift, 87, 161-167.
    doi:10.1007/s12542-012-0158-9 |

    Kahl, W.-A. & Ramminger, B. (2012) Non-destructive fabric analysis of prehistoric pottery using high-resolution X-ray microtomography: a pilot study on the late Mesolithic to Neolithic site Hamburg-Boberg. Journal of Archaeological Science, 39, 2206-2219.
    doi:10.1016/j.jas.2012.02.029 |

    Majzlan, J., Drahota, P., Filippi, M., Grevel, K.-D., Kahl, W.-A., Plášil, J., Boerio-Goates, J. & Woodfield, B. F. (2012) Thermodynamic properties of scorodite and parascorodite (FeAsO4·2H2O), kaňkite (FeAsO4·3.5H2O), and FeAsO4. Hydrometallurgy, 117-118, 47-56.
    doi:10.1016/j.hydromet.2012.02.002 |

    Soltan, A. M. M., Kahl, W.-A., Wendschuh, M. & Hazem, M. M. (2012) Microstructure and reactivity of calcined mud supported limestones. Mineral Processing and Extractive Metallurgy (Trans. Inst. Min Metall. C), Vol. 121, 5-11.
    doi: 10.1179/1743285511Y.0000000024 |

    Soltan, A. M. M., Kahl, W.-A., Hazem, M. M., Wendschuh, M. & Fischer, R. X. (2011) Thermal microstructural changes of grain-supported limestones. Mineralogy and Petrology, Vol. 103, 9-17.
    doi: 10.1007/s00710-011-0151-0 |

    Kiel, S., Kahl, W.-A. & Goedert, J. L. (2011) Osedax borings in fossil marine bird bones. Naturwissenschaften, Vol. 98, Number 1, 51-55.
    doi: 10.1007/s00114-010-0740-5 |

    Kiel, S., Goedert, J. L., Kahl, W.-A. & Rouse, G. W. (2010) Fossil traces of the bone-eating worm Osedax in early Oligocene whale bones. PNAS, Vol. 107, No. 19, 8656-8659.
    doi: 10.1073/pnas.1002014107 |

    Grevel, K.-D., Kahl, W.-A., Majzlan, J., Navrotsky, A., Lathe, C. & Fockenberg, T. (2005) Thermodynamic properties of magnesiochloritoid. Eur. J. Mineral., 17, 587-598.
    doi: 10.1127/0935-1221/2005/0017-0587 |

    Kahl , W.-A., Maresch, W. V. & Welch, M. D. (2003) Enthalpy of formation of pargasite by high temperature solution calorimetry and heat capacity of pargasite and fluoropargasite by differential scanning calorimetry. Eur. J. Mineral., 15, 617-628.
    doi: 10.1127/0935-1221/2003/0015-0617 |

    Kahl , W.-A. & Maresch, W. V. (2001) Enthalpies of formation of tremolite and talc by high temperature solution calorimetry – a consistent picture. Amer. Mineral., 86, 1345-1357.
    link to Vol. 86, No. 11-12 |

    Grevel, K.-D., Navrotsky, A., Kahl, W.-A., Faßhauer, D. W. & Majzlan, J. (2001) Thermodynamic data of the high-pressure phase Mg5Al5Si6O21(OH)7 (Mg-sursassite). Phys. Chem. Minerals, 28, 475-487.
    doi: 10.1007/s002690100175 |

    Kahl, W.-A. & Schumacher, J.C. (2000) Multiple pyroxene and amphibole assemblages in the amphibolite facies: bulk compositional controls. Amer. Mineral., 85, 1606-1616.
    link to Vol. 85, No. 11-12 |

    Publications (non peer-reviewed)

    Wisshak, M. , Titschack, J. , Kahl, W.-A. and Girod, P. (2017) Classical and new bioerosion trace fossils in Cretaceous belemnite guards characterised via micro-CT, supplementary material. PANGAEA Documentation, Bremerhaven, PANGAEA.
    hdl:10013/epic.50826 |

    Kahl, W.-A., Ramminger, B. (2012) Zerstörungsfreie Analysen prähistorischer Keramik mittels hoch auflösender Mikro-Computertomographie am Beispiel spätmesolithischer und neolithischer Funde aus Hamburg-Boberg. In: B. Ramminger/O. Stilborg (Eds.), Naturwissenschaftliche Analysen vor- und frühgeschichtlicher Keramik II: Methoden, Anwendungsbereiche, Auswertungsmöglichkeiten. Universitätsforschungen zur prähistorischen Archäologie 216, 2012, 59-95.

    Conference Abstracts

    Fischer, C., Kurganskaya, I., Kahl, W.-A., Bollermann, T., Prüsse, F., Bach, W., Luttge, A. (2017) Upscaling of Dissolution Rate Contributors from the Atomic Scale to the Macroscopic Scale. Goldschmidt Abstracts, 2017.

    Bach, W., Kahl, W.-A., Türke, A. (2017): Rates and processes of tephra alteration in Surtsey volcano: a combined observational and experimental approach. IODP/ICDP Kolloquium, Braunschweig, Deutschland.

    Kahl, W.-A., Hidas, K., Dilissen, N., Garrido, C.J., Lopez-Sanchez Vizcaino, V., Roman-Alpiste, M.J. (2017) Reconstruction of the 3-D Shape and Crystal Preferred Orientation of Olivine: A Combined X–ray –CT and EBSD-SEM approach. European Geosciences Union General Assembly 2017, 23-28 April, 2017, Vienna, Austria, Geophysical Research Abstracts 17, EGU2017-8061.

    Dilissen, N., Hidas, K., Garrido, C.J., Lopez-Sanchez Vizcaino, V., Kahl, W.-A., Padron-Navarta, J.A., Roman-Alpiste, M.J. (2017) Relationship Between Far Field Stresses, Fluid Flow and High-Pressure Deserpentinization in Subducting Slabs: a Case Study From the Almirez Ultramafic Massif. European Geosciences Union General Assembly 2017, 23-28 April, 2017, Vienna, Austria, Geophysical Research Abstracts 17, EGU2017-16454.

    Los, C.L., Kahl, W.-A., Plümper, O., Bach, W. (2016): Formation of replacive sulphide in anhydrite chimneys. Jährliches DMG Sektionstreffen 2016 Geochemie-Petrologie-Petrophysik, Bremen.

    Dilissen, N., Kahl, W.-A., Garrido, C.J., Sanchez-Vizcaino, V.L., Hidas, K. (2016) Deciphering the dynamics of olivine nucleation and growth during antigorite breakdown. European Geosciences Union General Assembly 2016, 17-22 April, 2016, Vienna, Austria, Geophysical Research Abstracts 16, EGU2016-5743.

    Klein, F., Bach, W., Humphris, S.E., Kahl, W.-A., Jöns, N., Moskowitz, B., Berquó, T.S. (2014) Low-Temperature Serpentinization Produces Abundant Hydrogen within the Temperature Limits of Life. Goldschmidt Abstracts, 2014, 1276.

    Türke. A., Bach, W., Kahl, W.-A., Klügel, A. (2014): Palagonitization of basalt glass in the flanks of mid-ocean ridges: impications for bioenergetics of oceanic intracrustal ecosystems. 4th Nordic Astrobiology Conference, Bergen, Norwegen.

    Türke, A., Bach, W., Kahl, W.-A., Klügel, A. (2013): Palagonitization of basalt glass in the flanks of mid-ocean ridges: impications for bioenergetics of oceanic intracrustal ecosystem. DMG/GV Meeting, Tübingen, Deutschland.

    Bach, W., Kahl, W.-A., Jöns, N., Türke, A., Plümper, O. (2013) Rocky Constraints on Catabolic Energy Supply in the Subseafloor. Mineralogical Magazine, 77(5) 638.

    Kahl, W.-A., Jöns, N., Bach, W., Klein, F. (2013) Polyphase serpentinization history of Mariana forearc mantle: observations on the microfabric of ultramafic clasts from ODP Leg 195, Site 1200. Geophysical Research Abstracts 15, EGU2013-13864.

    Klein, F., Bach, W., Kahl, W.-A., Humphris, S. (2013) Redox Controls and Reaction Pathways during Serpentinization of Abyssal Peridotite. Geophysical Research Abstracts 15, EGU2013-8752.

    Kahl, W.-A., Holzheid, A. (2013) High-resolution 3D X-ray microtomography as tool to investigate size distribution of grain phase and pore space in sandstones. Geophysical Research Abstracts 15, EGU2013-7640.

    Jöns, N., Kahl, W.-A., Bach, W. (2013) Reaction-induced porosity and onset of carbonation in abyssal peridotites: insights from 3D high-resolution microtomography. Geophysical Research Abstracts 15, EGU2013-5412.

    Kahl, W.-A., Ramminger, B., and Helfert, M. (2012) X-ray microtomography: a non-destructive tool to visualise different links in the production chain of ancient pottery. European Mineralogical Conference, Vol. 1, EMC2012-280, 2012.

    Kahl, W.-A., Jöns, N. (2012) X-ray microtomography as a visualization tool for fluid-rock interaction in the oceanic crust: insights into serpentinisation and low-temperature seawater alteration. SkyScan Usermeeting 2012, 03.-05.04.2012, Brussels, Belgium. Micro-CT User Meeting Abstract Book ISBN 9789081678100, p. 21-26.

    Kahl, W., Helfert, M., Ramminger, B. (2012) Potsherds of late Mesolithic/Neolithic age shed light on prehistoric ceramicist's workshop. SkyScan Usermeeting 2012, 03.-05.04.2012, Brussels, Belgium. Micro-CT User Meeting Abstract Book ISBN 9789081678100, p. 218-223.

    Kahl, W.-A., Jöns, N., Bach, W., & Klein, F. (2012) Polyphase serpentinization history of Mariana forearc mantle: observations on ultramafic clasts from ODP Leg 195, Site 1200. IODP-ICDP Kolloquium Kiel, p.84.

    Grevel, K.-D., Majzlan, J., Kahl, W.-A., Woodfield, B.F., & Boerio-Goates, J. (2012) Thermodynamics of scorodite, FeAsO4*2 H2O. EMPG 2012 – Abstract volume, p. 70.

    Kahl, W.-A., Jöns, N., Bach, W., & Klein, F. (2011) Polyphase serpentinization history of Mariana forearc mantle: observations on ultramafic clasts from ODP Leg 195, Site 1200. Mineralogical Magazine 75, p.1134.

    Kahl, W.-A., Feeser, V., Hinkes, R., Holzheid, A. (2011) Anisotropy of elastic waves in sandstone: correlation with microstructural observations. SkyScan Usermeeting 2011, 13.-15.04.2011, Leuven, Belgium. Micro-CT User Meeting Abstract Book ISBN 9789081678100, p. 196.

    Kahl, W., Ramminger, B. (2011) Potsherds of late Mesolithic/Neolithic age shed light on prehistoric ceramicist's workshop. SkyScan Usermeeting 2011, 13.-15.04.2011, Leuven, Belgium. Micro-CT User Meeting Abstract Book ISBN 9789081678100, p. 248.

    Kiel, S., Kahl, W.-A., Godert, J. L., Rouse, G. W. (2011) Osedax borings in fossil early Oligocene marine bird bones. SkyScan Usermeeting 2011, 13.-15.04.2011, Leuven, Belgium. Micro-CT User Meeting Abstract Book ISBN 9789081678100, p. 244.

    Beier, K., Kahl, W.-A., Holzheid, A. (2011) Dissolution experiments of potential reservoir materials in CO2-bearing saline fluids. IOPD workshop GEOLOGICAL CARBON CAPTURE & STORAGE IN MAFIC AND ULTRAMAFIC ROCKS. Muscat, Sultanate of Oman 8-10 January, 2011.

    Kahl, W.-A., Holzheid, A. (2010) Estimated and "true" geometric surfaces and their possible impact on experimentally and thermodynamically derived mineral dissolution and precipitation rates in CO2-brine-mineral reactions. DMG Tagung, Münster 19.09.-22.09.2010, Presentation S04-T02, p. 43.

    Beier, K., Kahl, W.-A., Holzheid, A. (2010) Dissolution rates of calcite in CO2-bearing brines - a comparison of experimental and literature data. DMG Tagung, Münster 19.09.-22.09.2010, Presentation S04-T08, p. 52.

    Soltan, A. M., Kahl, W.-A., Wendschuh, M., Hazem, M. (2010) Impact of thermal microstructural changes of Egyptian limestones on quicklime reactivity: mud-supported limestones. DMG Tagung, Münster 19.09.-22.09.2010, Poster P4-07, p. 242.

    Kahl, W.-A., Hinkes, R., Feeser, V., Holzheid, A. (2010) Anisotropy of sandstones. SkyScan User Meeting 2010, 07.-09.07.2010, Mechelen, Belgium, Presentation #41.

    Kiel, S., Kahl, W.-A., Godert, J. L., Rouse, G. W. (2010) 30 Million year old traces of the bone-eating worm Osedax. SkyScan User Meeting 2010, 07.-09.07.2010, Mechelen, Belgium, Poster #2.

    Beier, K., Kahl, W.-A., Holzheid, A. (2010) Influence of temperature and reactive surface on dissolution rates of carbonates in CO2-bearing brine. Geophysical Research Abstracts, Vol. 12, EGU2010-0, EGU General Assembly 2010

    Kahl, W.-A., Holzheid, A. (2009) X-ray computed microtomography in geoscience: two case studies. DMG Tagung, Halle 13.09.-16.09.2009, Abstract #118 (CD-ROM).

    Beier, K., Kahl, W.-A., Holzheid, A. (2009) CO2-Sequestration on the laboratory scale - first results of chemical interaction processes between injected CO2, saline fluids and potential reservoir materials. DMG Tagung, Halle 13.09.-16.09.2009, Abstract #24 (CD-ROM).

    Grevel, K.-D., Kahl, W.-A. (2009) High-temperature oxide melt calorimetry: the enthalpy of formation of topaz-OH, Al2SiO4(OH)2. Micro-Analysis, Processes, Time (MAPT): Annual Meeting 2009 of the Mineralogical Society of Great Britain and Ireland, 31.08. - 02.09.2009, Edinburgh, United Kingdom.

    Kahl, W.-A., Holzheid, A. (2009) Quantifying porosities in sandstones: How to assess accuracy?. SkyScan User Meeting 2009, 22.-24.04.2009, Ghent, Belgium, Presentation #41.

    Kahl, W.-A., Beier, K., and Holzheid, A. (2008) Determination of CO2-Solubilities in Complex Brines as Part of an Experimental Study on CO2-Sequestration on the Laboratory Scale, DMG Tagung, Berlin, 14.-17.09.2008, Abstract #204 (CD-ROM).

    Grevel, K.-D., Navrotsky, A., Kahl, W.-A., Majzlan, J. & Lathe, C. (2003) Thermodynamic data of Mg-chloritoid, EGS-AGU-EUG conference, Nice, France.

    Grevel, K-D; Navrotsky, A.; Kahl, W.- A.; Majzlan, J.; Lathe, C. (2003) Thermodynamic data of Mg-chloritoid, 81. Jahrestagung der Deutschen Mineralogischen Gesellschaft (Bochum 2003), 70.

    Kahl, W.-A., Fockenberg, T., Gottschalk, M., Wolf- I. & Maresch, W. V. (2000) Crystal chemistry and enthalpy of formation of synthetic glaucophanic amphibol, Berichte der Deutschen Mineralogischen Gesellschaft, Beih. z. Eur. J. Mineral., 12, No. 1, 89.

    Kahl, W.-A. & Maresch, W.V. (1999) Tremolite: Enthalpy of formation calculated from high-temperature, drop-solution calorimetry, Berichte der Deutschen Mineralogischen Gesellschaft, Beih. z. Eur. J. Mineral., 11, 114.

    Schumacher, J.C. & Kahl, W.-A. (1999) Mineralogy and petrology of amphibole- and pyroxene-bearing assemblages from Mn-Quartzites (coticules), Southwestern New Hampshire, USA [invited], EOS supplement, 80, 359.


    Dissertation

    Kahl, W.-A. (2000) Hochtemperatur-Lösungskalorimetrie und Leistungsdifferenzkalorimetrie zur thermodynamischen Charakterisierung von Mineralen. Dissertation, Ruhr-Universität Bochum


    Diplomarbeit

    Kahl, W.-A. (1995) Mineralchemie und Phasenbeziehungen in granat-, amphibol- und erzführenden Quarziten von Südneuengland, USA, unpublished Diplom thesis, Universität Kiel, 151 pp.