1. Department of Mineralogy; Geochemistry and Petrology; University of Szeged; H-6722 Szeged Hungary
2. Hawai‘i Institute of Geophysics and Planetology; School of Ocean; Earth Science and Technology; University of Hawai‘i at Mānoa; Honolulu Hawai‘i 96822 USA
3. MTA-ELTE Volcanology Research Group; H-1117 Budapest Hungary