Int. Activities

Prof. VALENTIN R. TROLL   Chair of Petrology  |  Uppsala University  |   Sweden  |



Jul 2018: Invited talk, MLYB Conference, Hefei University of Technology, Hefei, Anhui, China.


Sep 2017: Invited Koesmono Guest Lecture, Padjadjaran University (UNPAD) Bandung, Indonesia. Title: "Krakatoa - Some 135 years after the big event".


Sep 2017: Invited lecture, Gadja Mata University (UGM), Yogyakarta, Indonesia.  Title: "Krakatoa - Some 135 years after the big event".


Sep 2017: Invited lecture, Merapi Volcano Observatory at the Centre of Volcanology and Geological Hazard Mitigation, Yogyakarta, Indonesia. Title: "1902 Mt Pelée - Hazards associated with subduction zone type dome volcanoes".


Aug 2016: Invited lecture, Cluff Geothermal Energy Ltd., London, UK. Title: "Geothermal activity in Indonesia".


May 2015: Keynote talk, Johannes Rasmussen converence, Torshavn, Faroe Islands. Title: "Magma Plumbing in the North Atlantic Igneous Province".


Feb 2015: Evening Guest Lecture, Annual Irish Geological Research Meeting, Belfast, Northern Ireland. Title: "Redefining the stratigraphy of Northern Irelands’ volcanic history".


Nov 2014: Invited talk, Colloquium "Frontiers in Petrology", Frankfurt/Main, Germany. Title: "Volcanoes, magma transport and the source of volcanic CO2 emissions".


Jun 2014: Keynote talk, Mourne Cooley Gullion Geotourism EXPO 2014, Newry, Northern Ireland. Title: "Short lived explosive volcanism in NE Ireland: rewriting the stratigraphy of the British and Irish Palaeogene Igeneous Province".


Dec 2013: Keynote talk, AGU meeting in San Francisco, USA. Title: "Magmaplumbing of Krakatau volcano ... what will happen next?".


Nov 2013: Keynote talk, Surtsey Symposium Uppsala, Sweden. Title: "Phreatomagmatism in the Canary islands".


Oct 2013: Keynote talk, ESF Workshop "European Volcano Observatories - implementation of scientific expertise into the observatories", University of the Azores, São Miguel, Portugal. Title: "Rocks and minerals as predictive tool for volcanic eruptions".


Sep 2013: Invited lecture, LKAB Kiruna, Sweden. Title: "Krakatau volcano - 130 years after the big event".


Mar 2013: Invited lecture, University of Copenhagen, Denmark. Title: "What makes caldera volcanoes blow their tops? A petrological approach".


Feb 2013: Keynote talk, ESF workshop on "Volcanotectonics", University of Oslo, Norway. Title: "The plumbing system of large caldera systems".


Nov 2012: Invited lecture, Geologiska Sektionen, Student Society, Uppsala University, Sweden. Title: "The eruptive history of Krakatau: The myth behind the volcano". 


Oct 2012: Invited lecture, Universidad de Las Palmas de Gran Canaria, Spain. Title: "Eruptive history of the Krakatau volcanic complex, Indonesia".

Watch on Youtube


Sep 2012: Invited lecture, CNR - Istituto di Geoscienze e Georisorse (IGG) Pisa, Italy. Title: Petrological, mineralogical and gas-chemical controls on volcano behaviour: Merapi, Indonesia".


Sep 2012: Invited lecture, Istituto Nazionale di Geofisica e Vulcanologia (INGV) Pisa, Italy. Title: "Magmatic evolution of the Krakatau volcanic complex; what does the future hold?".


Aug 2012. Invited lecture, Open University, UK. Title: "Magma supply and crustal differentiation at Krakatau volcano, Indonesia".


Feb 2012:  Invited lecture, Centre for Natural Disaster Science (CNDS), UU, Sweden. Title: "The 1902 eruption of Mt. Pelée, Lesser Antilles; analysis of a catastrophy".


Feb 2012: Invited lecture, University of Glasgow, UK. Title: "Petrological and geochemical indicators of volcano behaviour: Merapi volcano, Central Java, Indonesia".


Jan 2012: Invited talk, ESF MeMoVolc Workshop on "Understanding volcanic conduit processes", University Blaise Pascal, Clermont-Ferrand, France. Title: "Petrological indicators for volcano behaviour: Merapi, Indonesia".


Jan 2012: Keynote talk, Nordic Geological Winter Meeting, Reykjavík, Iceland. Session: UV4 on North Atlantic Igneous Province. Title: "Magmatism in the British and Irish sectors of the North Atlantic Large Igneous Province".


Jan 2012: Keynote talk, VMSG meeting, University of Durham, UK. Title: "Life and death of the Paleocene Rum volcanic centre, NW-Scotland".


Dec 2011: Invited lecture, University of Leipzig, Germany. Title: "Hydrothermal breakdown of volcanic glass in ocean-island volcanic settings, Tenerife and Gran Canaria".




2018 - ongoing: Journal of Petrology Editor


2012 - ongoing: Int. Correspondent for Geology Today, which is published on behalf of the Geological Society of London.


2005 – ongoing: Reviewer for >50 scientific papers and for research proposals from NERC, DFG, NSF and the Research Councils of Finland and Switzerland.


Apr 2019: Session Convenor at EGU General Assembly, Vienna.


2018: EPOS External Evalutation Panel (EEP) member for laboratories and volcano observatories in Europe.


Jan 2018: Invited Session Convenor at "Nordic Geological Winter Meeting", Copenhagen, Denmark.


Sep 2014: Invited Session Convenor at "Cities on Volcanoes", Yogyakarta, Indonesia.


Aug 2013: Invited Session Convenor at the Goldschmidt Geochemistry Conference in Florence, Italy.


Feb 2013: Co-Organisator of MeMoVolc Workshop "Mechanics of magma emplacement and volcanotectonics", Oslo, Norway.

Workshop Booklet [PDF]


Sep 2012: Invited Session Convenor at 1st European Mineralogical Conference in Frankfurt, Germany. "Magmatic crystals as recorder of pre- and syn-eruptive processes".


2011 - 2017: Steering Committee member for ESF network MeMoVolc.


2010 - 2016: Elected co-chair for working group No.6 (WG6 - Analytical and Experimental Laboratories) of the European Plate Observing System (EPOS).   


2012: Invited Session Convenor at the Goldschmidt Geochemistry Conference in Montreal, Canada.


2011: Invited Session Convenor at the Goldschmidt Geochemistry Conference in Prague, Czech Republic.


2010: Invited Session Convenor at the VMSG meeting in Glasgow, UK.


2009: Invited Session Convenor at the Janet Watson meeting in London, UK.


2008: Invited Session Convenor IGC Meeting in Oslo, Norway in "Magma chambers & eruptions; linking petrology and geophysics".


2008: As part of my duties as a Committee member of the Volcanic and Magmatic Studies Group (VMSG) Host of the VMSG Conference at Trinity College Dublin. Over 150 international researchers attended.

Society News 4/08 [PDF]


2007 - 2012: Invited Session Convenor at annual European Geoscience Union (EGU) meeting in Vienna, Austria. "Magmatic differentiation: theory, experiments and examples".


2007: Session Convenor at the Goldschmidt Geochemistry Conference in Cologne, Germany.


2007: Co-organiser "Golden Rum" Workshop together with K. Goodenough (BGS, Edinburgh) and D. Jerram (Durham University).

The VMSG and Geological Society sponsored the workshop to celebrate 50 years of Rum as a Nature Reserve (30 selected attendees).

Geoscientist 3/08: Feature "Golden Rum".


2006: Session Convenor at European Geoscience Union (EGU) meeting in Vienna, Austria.


2005 - 2007: Commission from the Scottish Natural Heritage (SNH) to design their official fieldguide and leaflets/handouts and display boards for their Interpretive Centre on the Isle of Rum, which is the largest nature reserve in the British Isles.


2005: Neutral Observer for major EC funded project "ERUPT" coordinated by Prof. J. Davidson, Durham, UK.


2005: Rum Excursion, Co-leader of fieldtrip (with H. Emeleus, University of Durham) to the classic geological locations on the Isle of Rum, Scotland as part of the American Geophysical Union Chapman Conference on “mantle plumes” in Fort William, Scotland, UK.


2001 - 2008: Adviser for over forty 3rd and 4th year research projects in Dublin. This led to more than 50 conference contributions where undergraduate students were first or contributing authors.


2001 - 2007: Series of book reviews for "Spektrum der Wissenschaft“, German Branch of "Scientific American".


2000 - 2002: Founder and Supervisor of the Structural Volcano Laboratory at GEOMAR together with T.R. Walter.

Dec 2011: Invited keynote talk, AGU meeting in San Francisco, USA. Session: "Rocks and minerals as predictive tool for volcanic eruptions".


Oct 2011: Invited lecture, University of Cape Town, South Africa. Title: "Scottish and Irish ring complexes, history, nature and modern approaches".


Mar 2011: Invited lecture, Copenhagen University, Denmark. Title: "The BPIP revisited".


Jan 2011: Award-lecture, VMSG meeting, University of Cambridge, UK. Title: "Crustal contamination across five tectonic terraines; the Palaeocene Igneous rocks of NW-Scotland and N-Ireland".


Aug 2010: Invited lecture, NORDVULK Volcano Summerschool, Iceland. Title: "Origin, evolution and death of a large central volcano: The Rum igneous complex, NW-Scotland".


Jun 2010: Invited lecture, Copenhagen University, Denmark. Title: "The 2006 Merapi eruption, Java, Indonesia".


Nov 2009: Invited lecture, LMU München, Germany. Title: "Petrogenisis of ocean island rhyolites in the Canary Islands".


Oct 2009: Invited lecture, Unvisersity of Cape Town, South Africa. Title: "Probing the continental crust beneath Merapi, Java, Indonesia".


Apr 2009: Invited lecture, Charles University in Prague, Czech Republic. Title: "The Tertiary Rum volcano: origin and evolution of a central volcanic complex".


Mar 2009: Invited lecture, Swedish Geological Survey (SGU) Uppsala, Sweden. Title: "New approaces to magmatic differentiation: crystal-isotope stratigraphy applied to modern and ancient volcanic rocks".


Aug 2008: Keynote talk, 33rd International Geological Conference (IGC) Oslo, Norway in the session "The NorthAtlanticIgneousProvince". Title: "Crustal provincialism in the British and Irish sector of the North-Atlantic Igneous province".


Jun 2008: Invited lecture, Open University, UK. Title: "Why should we look at historic eruptions? Mt. Pelée 1902 and what we learned from it".


May 2008. Invited lecture, University of Bristol, UK. Title: "Irregular explosive behaviour of andesite dome volcanoes: Merapi, Indonesia".


Feb 2008: Invited lecture, Swedish Mineralogical Society, Uppsala, Sweden. Title: "Multistage evolution of peralkaline rhyolites on Gran Canaria: implications for the internal structure of ocean islands".


Feb 2008: Invited talk, Geomar Research Center, Kiel, Germany. Title: "Changing eruptive styles of literal cones in the Canary Islands: implications for hazards of rift zone eruptions".


Dec 2007: Invited lecture, University of Stockholm, Sweden. Title: "New approaches to magmatic differentiation: in-situ crystal isotope studies".


Oct 2007: Invited keynote talk, EU-workshop on "What is a magma chamber?" Madrid, Spain. Title: "Magma chamber processes recorded in minerals and inclusions in recent Merapi lavas".


Sep 2007: Invited lecture, Universidad Nacional Autónoma de México (UNAM), México. Title: "Merapi volcano, Indonesia: A decade volcano with its own rules".


May 2007: Invited lecture, University of Oslo, (PGP) Norway. Title: "Collapse calderas in active tectonic regimes: the problem of caldera ellipticity".


Apr 2007: Keynote talk, European Geoscience Union EGU, Vienna, Austria in the session: "Explosive basaltic volcanism". Title: "Textural features of changing eruptive styles from phreatomagmatic to strombolian activity of basaltic littoral cones: Los Erales cinder cones, Tenerife, Canary Islands".


Nov 2006: Invited lecture, Ludwig-Maximilian University of Munich, Germany. Title: "Explosivevolcanism in Java, Indonesia: causes and consequences".


Sep 2006: Invited talk, Merapi Symposium, Yogyakarta, Indonesia. Title: "Magma-carbonate interaction at Merapi volcano, geochemical insight into volcano behaviour."


Sep 2006: Invited keynote talk, Goldschmidt Geochemical Conference, Melbourne, Australia in the session: "Unravelling differentiation processes in subduction zone systems." Title: "Magma-crust interaction at Merapi volcano, Indonesia; geochemical insight into volcano behaviour."


Sep 2006: Invited talk, Fermor Meeting of the Geological Society of London, Natural History Museum London, UK. Title: "Volatiles from high-temperature fumaroles along the Java segment of the Sunda arc: exploring the role of crustal contamination."


Jun 2006: Invited lecture, Katholieke Universiteit Leuven, Belgium. Title: "Geological history of the Palaeogene Rum Volcano, NW-Scotland".


Jun 2006: Invited lecture, Geo Forschungs Zentrum Potsdam (GFZ), Germany. Title: "Magma-crust interaction at Merapi volcano, Indonesia; petrological and gas-chemical investigations".


Apr 2006: Invited lecture, University College Dublin (UCD), Ireland. Title: "Explosive volcanism at Merapi volcano Indonesia: insights from petrochemistry".


Feb 2006: Invited lecture, Instituto Nazionale di Geofisica e Vulcanologia, (INGV) Rome, Italy. Title: "Carbonate-assimilation at Merapi volcano, Indonesia".


May 2005: Keynote talk, Goldschmidt Geochemical Conference, Moscow, Idaho, USA to the session ‘Origin of large-volume silicic magmas’. Title: "Petrogenesis of voluminous intra-caldera ignimbrites of the Rum Igneous Centre, Scotland".


Apr 2005: Keynote talk, Volcano-Tectonics Session at the European Union of Geosciences (EGU) meeting, Vienna, Austria. Title: "The problem of caldera ellipticity". 


Feb 2005: Invited lecture, Open University, Milton Keynes, UK. Title: "Petrogenesis of rhyolite on ocean islands: evidence from Gran Canaria, Canary Islands".


May 2004: Invited talk, Spring Meeting of the 'American Geophysical Union', Montréal, Canada. Title: "Hydrothermal alteration of intra-caldera deposits, Tejeda caldera, Gran Canaria, Spain".


Mar 2004: Invited lecture, Laboratoire Magmas et Volcans, University Blaise Pascal, Clermont–Ferrand, France. Title: "Collapse calderas in regional tectonic regimes: the problem of caldera ellipticity."


Mar 2004: Invited lecture, University College Cork (UCC), Ireland. Title: "Volcanic history and large-scale pyroclastic eruptions on Gran Canaria, Canary Islands: origin of explosive volcanic activity on ocean islands".


Jan 2004: Invited talk, University of Oxford, UK. Title: "Shallow-level processes and the cause for frequent explosive eruptions: Merapi volcano, Indonesia". 


Oct 2003: Invited lecture, Victoria University Wellington, New Zealand. Title: "Petrogenesis of rhyolite on ocean islands: evidence from Gran Canaria,

Canary Islands".


Sep 2003: Invited presentation, "State of the Arc 2003" meeting (SOTA) in Portland, Oregon, USA. Title: "Shallow-level crustal contamination and its impact on the volatile budget and eruptive behaviour in arc volcanoes: evidence from recent Merapi lavas".


May 2002: Invited lecture, Trinity Alumni Association, Dublin, Ireland. Title: "The 1902 climactic eruption of Mt. Pelée, Martinique: causes and consequences".


2002: Lecture series, Irish Geological Association with talks in Dublin and Galway, Ireland. Title: "A brief history of the 60 million year old Rum volcano, NW Scotland".


Feb 2001: Invited presentation, Penrose Conference of the 'Geological Society of America' on 'Longevity and dynamics of rhyolitic magma chambers', Mammoth, California, USA. Contribution: "Feldspar zoning in composite ignimbrite 'A', Gran Canaria: implications for the dynamics of crystal exchange in rhyolitic magma chambers".