Fig. 9From: Geochemical/hydrochemical evaluation of the geothermal potential of the Lamongan volcanic field (Eastern Java, Indonesia)Secondary-electron images collected with the electron microprobe. a Elongated euhedral plagioclase in a microcrystalline matrix. b Fractured olivine surrounded by magnetite (bright). c Fractured plagioclase grain with elongated habitus in a microcrystalline matrixBack to article page