The Selogiri area, situated in Wonogiri regency, Central Java, is one of several gold prospecting areas in the Southern areas Mountain Range in Java, Indonesia. Three types of dioritic -andesitic intrusive rocks occur in the Selogiri area, namely, hornblende andesite porphyry, hornblende diorite porphyry and hornblende diorite, exposed in a half-circular depression where volcanic breccia and tuff are widely distributed. The occurrence of stockwork quartz veinlets and associated with magnetite and malachite coating along the cracks in the diorite porphyry suggests porphyry type mineralization. This is also supported by the occurrence of polyphase hypersaline fl uid inclusions in the stockwork veinlet quartz. Small-scale miners are mining NS-trending quartz veins for gold associated with base metal sulfi des. These veins are probably epithermal-type mineralization that overprinted porphyry-type mineralization. The Neogene intermediate to silicic hydrous magmatism in Java could have formed the porphyry-type mineralization in Selogiri, as in the rest of the Sunda -Banda arc. Keywords : fl uid inclusion , Indonesia , Java , metallogeny , porphyry copper deposit , stockwork , Sunda-Banda arc . Geologic outline of the Southern Mountain Range of JavaThe Selogiri area is part of the Southern Mountain Range in Central Java. The Southern Mountain Range is situated in the present-day fore-arc region between the Quaternary volcanic chain and the Java trench. The Indo-Australian plate is subducting northwards at the Java trench ( Katili, 1975;Hamilton, 1979;Setijadji et al. , 2006 ) ( Figs 1, 2).The geology of the Southern Mountain Range consists of a series of volcanic rocks and fl ysch-like deposits ( Rahardjo et al. , 1995 ) MethodsWhole-rock compositions of intrusive and volcanic rocks were determined by X-ray fl uorescence spectrometer Rigaku RINT-3100 at the