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|The Mt. Morgan mine, located 36 km SSW of Rockhampton, Qld at Lat. 23¦38' S, Long. 1500 22'E, is hosted by a Middle Devonian sequence of acid volcanic rocks and sediments. The Upper Nine Mile Creek (UNMC) prospect, 14 km SE of the Mt. Morgan mine, is in an ap- parently equivalent sequence of rocks. The Late Devonian Mt. Morgan Tonalite separates the two areas. The Mt. Chalmers mine, located 27 km NE of Rockhampton at Lat. 23¦ 18' S, Long. 150039'E, is hosted by the Early Permian Berserker Beds. These three volcanogenic massive sulphide deposits show pronounced similarities in their host rock lithologies and stratigraphic-struc- tural settings.|