MY RESEARCH is in the fields of Geochemistry, Petrology and Volcanology and my work aims to better understand physical and chemical processes that occur in nature and particularly around volcanoes. My efforts strive to better define and comprehend the interplay between formation and use of volcanic rocks and volcanic resources (ore deposits, geothermal energy, building stones, fertile soils) and volcanic hazards for humans and wildlife, and the risks for society and infrastructure in major population centres.

With my research I aim to contribute to several of the SUSTAINABLE DEVELOPMENT GOALS (SDGs) of the UN , including:

  • SDG2  fertile soils,
  • SDG3  health risks from volcanoes,
  • SDG4  hazard education,
  • SDG7  geothermal energy,
  • SDG8  mining and mineral extraction in extreme environments,
  • SDG9  volcanic risks to populations and infrastructures,
  • SDG11 safe cities in active volcanic regions,
  • SDG13 climate relevant natural processes and CO2 sequestration via mineral alteration, and
  • SDG14 mining around submarine volcanoes.


Since 2008: UPPSALA UNIVERSITY, Sweden.

Chair Professor

Department of Natural Resources & Sustainable Development

Researcher Profile

2023 - ongoing: Director of postgraduate education (FUAP) for Natural Resources and Sustainable Development (>20 PhD students in program).

2018 - 2021: Steering Board Member NordSIM-Vegacenter, Naturhistoriska Riksmuseet, Sweden.

2009 - 2019: Director of the Field-emission Microprobe facility (served two five year terms) at UU.

2010 - 2016: Elected member of the Steering Board for the Department of EarthSciences (250 employees; served two terms of three years).

2008 - 2011: Elected member of EarthScience Recruiting Committee (served one three year term).


2001 - 2008:  TRINITY COLLEGE DUBLIN, Ireland.

May 2007: Promotion to Associate Professor in Igneous Petrology & Volcanology.

May 2007: Elected Fellow of Trinity College (FTCD).

2005 & 2006: Accelerated promotions on the lecturer pay scale.

Sep 2004: Promotion to permanent Lecturer in Igneous Petrology & Volcanology.

Sep 2004: International Student Coordinator for Geology.

Dec 2003: Initiator and Director of Volcanic and Magmatic Processes Group.

Sep 2001: 5 year contract as Lecturer in Igneous Petrology & Volcanology.


2003 - 2010: BLAISE PASCAL UNIVERSITY, Clermont-Ferrand, France.

2004-2009: Erasmus Visiting Professor

2006: Habilitation à diriger des recherches (HDR).

Supervisor: Prof. B. van Wyk de Vries


1998 - 2001: GEOMAR, Centre for Ocean Research / University of Kiel, Germany.

Oct 1998 - Sep 2001: PhD project 'Evolution of large peralkaline silicic magma bodies and associated caldera systems, a case study from Gran Canaria, Canary Islands'.

Supervisors: Prof. H.-U. Schmincke and Dr. T.H. Hansteen

The thesis was awarded the grade 'mit Auszeichnung' (with distinction).

The project was funded by the 'Deutsche Forschungsgemeinschaft' (DFG) and through a personal fellowship from the 'Studienstiftung des deutschen Volkes'.


1996 - 1998: UNIVERSITY OF ST ANDREWS, Scotland, UK.

Jul 1998: BSc (Hons) with first class (Geology).

Aug 97 - Jul 98: BSc thesis 'On the intracaldera ignimbrites of the Northern Marginal Complex, Isle of Rum, Scotland'.

Supervisor: Dr. C.H. Donaldson

1998: The BSc thesis was awarded the 'de Courcy Duggan Prize' at St Andrews University for most innovative undergraduate research project.

1998: Final year Class medal of St Andrews GeoScience Class (35 students).



Mar 1996: 'Vordiplom' examinations in geology; (overall grade: first class).

Exam subjects: Geology & palaeontology, petrology & mineralogy, mathematics, and inorganic chemistry.

1994 - 1996: Main courses: Geology, mineralogy & petrology, and geophysics.

1993 - 1994: Main courses: Experimental physics, geophysics, and mathematics.


1987 - 1990: SIEMENS AG, Würzburg, Germany.

May 1990: Fully certified "industrial toolmaker".

Qualification received from the Chamber of Industry and Commerce of Lower Frankonia, Germany after 3 years of full time employment and practical & theoretical examinations.



since 2022: Fellow of the Royal Society of Arts (FRSA).

Since 2018: Editor for Journal of Petrology, Oxford University Press, UK.

Since 2014: Editorial Advisor for Springer Publishing in subject "Geochemistry".


Since Jun 2012: Invited Research Associate at 'Grupo Investigación Geología de Terrenos Volcánicos' GEOVOL, University of Las Palmas, Gran Canaria, Spain.


Since 2011: Steering Committee member for European Science Foundation (ESF) network MeMoVolc.


Since Jul 2008: Invited Research Associate of the 'Istituto Nazionale di Geofisica e Vulcanologia' INGV, Rome, Italy.


Since Feb 2009: Elected Fellow of the Geological Society of London (FGS).


Since Nov 2008: Elected Fellow of the Mineralogical Society of the UK & Ireland (FMinSoc).


Since May 2007: Elected Fellow of Trinity College (FTCD) for "higher academics achievement", which gives me free accommodation and board in Trinity College for lifetime and Emeritus status after retirement.


Since Jun 2003: Royal Society Fellowship to work at the University of Durham, UK.


Sep 2017: Koesmono Award and Ceremonial Guest Lecture at Padjadjaran University (UNPAD) Bandung, Faculty of Geological Engineering, Indonesia. UNPAD News | CNDS News | Summary [PDF] 


Sep 2017: Gadja Mata University (UGM) Departmental Medal in recognition of contributions to the education at UGM, Yogyakarta, Indonesia.


Jan 2011: VMSG Award by the Volcanic and Magmatic Studies Group (VMSG), United Kingdom, for "significant contribution to our understanding of magmatic processes over the last few years".

VMSG Newsletter No 13 [PDF] | VMSG Newsletter No 14 [PDF]


Nov 2010 - Nov 2012: Elected co-chair for working group No.6 (WG6 - Analytical and Experimental Laboratories) of the European Plate Observing System (EPOS).


Jun 2010 - Jun 2016: Elected member of the Steering Board of the Department of Geosciences at Uppsala University. Initially 2010 - 2013; Re-elected 2013-2016.


Jul 2008: Honorary Master (M.A.) from Trinity College Dublin for service.


May 2007: Accelerated promotion to Associate Professor at Trinity College Dublin (skipping the rank of "Senior Lecturer").


Apr 2007: "Most Cited Paper Award" from Journal of Volcanology and Geothermal Research, ELSEVIER, for the period 2003-2007 for Walter & Troll, 2003.


2005 & 2006: Two Accelerated Promotions at Trinity College Dublin (2 additional increments on the lecturer pay scale) on the grounds of "exceptionally distinguished performance in research, teaching, contribution to discipline and contribution to College".


Sep 2006: I received the degree of "Habilitation à diriger des Recherches" (HDR) from University Blaise Pascal, Clermont-Ferrand, which is the essential qualification in continental Europe (France, Germany, Austria, Poland, Sweden etc.) for eligibility to a full professorship. It is the highest academic degree in France and is awarded for a substantial body of high quality research summarised in a thesis (22 papers in Trolls case). It also requires documentation of teaching ability and that of leadership skills to direct a research group.


2005 - 2010: Invited Erasmus Professor (professeur invité) at the 'Laboratoire de Magmas et Volcans', Blaise Pascal University, Clermont-Ferrand, France, to carry out undergraduate teaching and joint supervision of MSc and PhD students.


2005 - 2008: Elected committee member of the 'Volcanic and Magmatic Studies Group' of the Mineralogical Society of UK and Ireland (three year term).




Nov 2001: PhD thesis was awarded the grade 'with distinction'.


2001: Geoff Brown Prize for best student poster at the annual meeting of the Volcanic and Magmatic Studies Group in Durham, UK.


Nov 1998: Fellowship from German Academic Scholarship Foundation (Studienstiftung des deutschen Vokes) to carry out PhD research.

Studienstiftung des deutschen Volkes is Germany’s oldest and largest organisation that sponsors outstanding students in the Federal Republic of Germany. The fellowship is awarded to first class students only and involved a peer-reviewed proposal, and two independent interviews. It is the most prestigious postgraduate award in Germany (top 0.5% of German PhD students).


Jun 1998: Final Year Class Medal of St Andrews Geoscience class (35 students).


Jun 1998: My BSc (Hons) thesis was awarded the de Courcy Duggan Prize for the most innovative BSc research project at St Andrews University that year.


Jun 1997: Mineralogical Society Student Award for excellence in igneous petrology, mineralogy and geochemistry at St Andrews University, Scotland, UK.





Apr 2021: Equal opportunity and subconscious bias. Training Course for Uppsala University staff (5 x 2 hours; Prof. K. Schönning).

Jun 2020: EBSD analytical techniques, 3 days on-site training, Natural History Museum Stockholm (Dr. G. Kenny).

Dec 2019: EBSD analysis via SEM. Natural History Museum Stockholm (Dr. G. Kenny).

May 2017: One-week course ‘Student centred learning’ at Uppsala University, Sweden.

May & June 2015:  Wilderness First Aid Certificate , NOLS Wilderness Medicine Institute, Stenungsund, Sweden (Dr. L. Conlan).


May 2015:  Wildlife Awareness cerfificate, Safety Association Canada.


Jun 2013: Doctoral Supervisor Training Course, Faculty of Science and Technology, Dept. for Quality Enhancement and Academic Teaching and Learning, Uppsala University, Sweden (Dr. P. Reinholdsson, Prof. M. Elmgren).


2010, 2008, 2005 & 2003: Leader / Co-leader of four expeditions to Indonesia (Java and Sumatra) with up to eight scientists on the team.


Nov 2009: Neutron tomography analysis of volcanic rock and xenolith at FRMII research reactor, Technical University of Munich, Germany (Dr. B. Schillinger).


Sep 2009: Stable isotope analysis (B, O, Fe), Nordsim, Natural History Museum, Stockholm, Sweden (Dr. M. Whitehouse).


Nov 2008: X-ray tomographic methods on geological samples, ELETTRA Synchrotron facility, Trieste, Italy (Dr. L. Mancini).


Feb 2006: Introduction course to high pressure/high-temperature experimental procedures (piston-cylinder), INGV-Rome, Italy (Dr. C. Freda).


May 2005: One-week intense practical training in in-situ laser ablation ICPMS analysis for radiogenic isotopes, Washington State University, USA (Prof. J. Wolff).


Feb 2004: One-week course in in-situ microdrilling of minerals for radiogenic isotope analysis, University of Durham, UK (Prof. J. Davidson and Dr. C. Ginibre).


Nov 2002: Short course on cathodoluminescence analysis (CL), Trinity College Dublin, Ireland (Dr. C. Mulhall).


Mar 2001: Two week cruise with the German research vessel "Poseidon" (P270) to dredge submarine rift zone volcanics off the Canary Islands (acted as chief petrographer).


Mar 2000: Three-week laboratory course on radiogenic isotope analysis with TIMS (chemical separation techniques and analysis), GEOMAR Research Centre, Kiel, Germany (Prof. K. Hoernle).


Apr 2000: One-week intense training course on 'Imaging techniques', University of Münster, Germany (SEM AFM, TEM) (Prof. A. Putnis).


Jan 2000: One-week practical course on Electron Microprobe Analysis, GEOMAR EMPA (SX-50) (Supervisor: Dr. P. Sachs).


Oct 1999: One-week course in Synchrotron-XRF-microprobe analysis, "Deutsches Elektronen Synchrotron", DESY, Hamburg, Germany (Dr. F. Lechtenberg).


Sep 1999: Two-week practical training on 'Scientific reporting' with the West-German TV (WDR) and the Czech Academy of Science, Prague, Czech Republic. (Dr. Ranga Yogeshwar).

Sommerakademie der Studienstiftung des deutschen Volkes & der Körber-Stiftung.


Jun 1999: Seven day training course in XRF analysis, GEOMAR Research Centre, Kiel, Germany (Supervisor: Dr. T. Hansteen).


Mar 1999: Two-week practical training with the preparation company GEOTRAIN. Geological sample preparation for optical microscopy, EMP and SYXRF-microprobe analysis, GEOTRAIN Kiel, Germany .


Dec 1998: Four week cruise with the German research vessel "Meteor" (DECOS/ M43-1) to dredge seamounts off the Canary Islands (assistant petrographer).

1980 - 1986: Member of the Youth Chapter of the Fire Brigade of Bavaria. Training in Fire Hazard Mitigation and Disaster Prevention.



since 2023: Corresponding Member of the Royal Canary Academy of Sciences -

Académico Correspondiente de la Real Academia Canaria de Ciencias (RAC Ciencias)

since 2022: Fellow of the Royal Society of Arts (FRSA)

since 2008: Elected Fellow of the Mineralogical Society of Great Britain and Ireland (FMinSoc)


since 2008: Elected fellow of the Geological Society of London (FGS)


since 2008: Member of the Swedish Geological Society


since 2007: Elected Fellow of Trinity College Dublin (FTCD)


since 2007: Member Int. Assoc. Volcanol. & Chem. Earth's Interior


since 2007: Member of the European Geosciences Union


since 2005: Member of the Geochemical Society


2002 - 2008: Member of the Irish Geological Association


since 2000: Member of the American Geophysical Union


since 1999: Member of the German Mineralogical Society


since 1997: Member of the Mineralogical Society of Great Britain & Ireland