With the scientific coordination of GTK, short course on isotope geochemistry of fluid-rock interaction was held at ELTE between 11-13 February 2020.

The lecturers of the three day long intense course were Hugh O`Brien, Yann Lahaye, Ferenc Molnár (Geological Survey of Finland), Holly Stein (Colorado State University and University of Oslo, Norway), Attila Demény and Zoltán Pécskay (Hungarian Academy of Sciences) and it was held at the Eötvös Loránd University, Budapest.

Most of the participants were students and professors of the ELTE, but some people arrived from the Karlsruhe Institute of Technology, University of Milan, University of Szeged and the GTK as well.

The course aimed to review the current state of the art in the application of isotope geochemistry for the understanding of processes in hydrothermal systems. Lectures focused on the traditional and new, cutting edge instrumentation of analyses, as well as the current developments and future perspectives of isotope geochemistry in fluid-rock systems. The presentations were divided between trace element analyses, radioactive elements for geochronological studies and radiogenic elements as conservative isotope tracers. The use of traditional and non-traditional stable isotope tracers in understanding mineralization processes were also discussed. Tracking of sources of fluids and their components, and determination of ages of mineralization processes were presented and supported with various case studies.​

Judit Mádl-Szőnyi, scientific coordinator of the H2020 project opened the event on the morning of 11 February and Hugh O’Brien continued with lectures about the basics of isotope geochemistry, instrumentation, and application of different minerals like magnetite, chalcopyrite, sphalerite and turmalin. Moreover he talked about the in-situ analyses of fluid inclusions and the origin of diamonds.

Yann Lahaye started the next day overviewing the different instruments, their applicability and limitations. Besides he had a presentation about nontraditional, radiogenic isotope analyses and U-Pb geochronology. Attila Demény talked about the history of the traditional isotope geochemistry and the latest technologies in this topic.

The last day was held by Holly Stein about the radiometric dating of sulphides, Zoltán Pécskay presented the K-Ar and Ar-Ar system, while Ferenc Molnár demonstrated Finnish and Hungarian case studies.