The geological setting of the indium-rich Baal Gammon and Isabel Sn-Cu-Zn deposits in the Herberton Mineral Field, Queensland, Australia

Base metal mineralization at the Baal Gammon and Isabel deposits of Herberton Mineral Field (HMF) is hosted in metamorphosed greywacke beds Hodgkinson Formation, which were intruded by granite, porphyry dykes overlain volcanic rocks Kennedy Igneous Association during Carboniferous Permian. The tin deposit a silicified, chlorite-altered, quartz-feldspar (UNA Porphyry). polymetallic veins hosting disseminated cassiterite. Polymetallic sulfides (Cu-Zn) indium (In) both overprint mineralization. Chalcopyrite, sphalerite, stannite host sulfide assemblage deposits. Based on overprinting relationships, timing related to magmatic activity ca. 320 Ma, whereas are most likely associated with emplacement 290 Ma. overall HMF spreads between 365 280 peaks 337, 322, 305, 285 change from Ma indicates transition compressive an extensional tectonic regime.