The Proterozoic Willyama Supergroup of the Broken Hill Block in western New South Wales, Australia, hosts a wide range of mineral deposits with commodities such as Pb, Ag, Zn, W, Cu, Co and Sn. The diversity and time relationships shown by the deposits reflect the long and complex geologic history of the area. Four broad categories of deposits have been recognized: stratiform, stratabound, vein, and intrusive-related. The stratiform deposits, including the well-known Broken Hill-type, are concordant and syngenetic, whereas the three epigenetic classes are largely the products of the partial or complete mobilization/remobilization of syngenetic mineralization. Stratigraphic and metallogenic data demonstrate that a wide range of potential sources exists for metals in the stratiform mineralization within the sequence. Stratiform mineralization occurs both as discrete mineral deposits and as pervasive, background disseminations, principally in the middle levels of the Willyama Supergroup stratigraphic sequence. The stratiform mineralization changes from predominantly Fe, Cu, Co in the Thackaringa Group to Pb, Ag, Zn, W in the Broken Hill Group, and finally to minor Sn above the Broken Hill Group. Localized remobilization of primary ore has occurred in many stratiform deposits. Some masses of mineralization have been physically remobilized during deformation while others contain features suggestive of fluid movement during the waning stages of high-grade metamorphism. In places, more extensive remobilization has produced discordant stratabound deposits. Some deposits are associated with igneous bodies derived from anatexis of the Willyama Supergroup metasediments and metavolcanics. These deposits are possibly the products of metal-scavenging by melts and associated hydrothermal fluids, all (metals, melts, fluids) being derived from the metamorphic sequence. Retrogression, both regionally, and in narrow retrograde schist zones, closely followed the 1660 Ma high-grade metamorphism, and also occurred during a later thermal/deformational event at about 520 Ma ago. Hydrothermal activity associated with both episodes of retrogression resulted in the formation of a range of vein types. During the last major episode of hydrothermal activity, retrograde schist zones were the main conduits for hydrothermal fluids which leached metals from the sequence to produce the well-known, low T-P, Thackaringa-type silver—lead bearing siderite—quartz veins.