Never before have the challenges of mine waste management been so important to ensure ongoing progress and development of mining operations with licence to operate now ranked as the number 1 business risk facing the mining and metals industry (Ernest Young, 2018). Societal expectations increasingly demand the sector to commit and contribute to community, government, employees and environment needs beyond the life-of-mine. This includes realistic planning for the ongoing management of mine waste storage facilities and their eventual closure. Too few global examples of successful mine closure exist for a myriad of reasons, the most important of which is the poor approach to the chemical and physical characterisation of mine waste (e.g., waste rock, tailings, slag and spent heap leach materials). Ultimately, these data inform the engineering design for the long-term storage of these waste materials. If they are not well designed then there is strong potential to induce acid and metalliferous drainage (AMD) whereby sulphides contained in mine waste oxidise (Dold, 2017) or catastrophic structural failures can occur as demonstrated at the Brumadinho Dam, Brazil in January 2019. AMD is characterised by low pH, high sulphate and metals which negatively impact on the water quality of the receiving environment (Dold, 2017; Naidu et al, 2019). Once AMD generation has started, stopping and managing it is technically challenging, costing mining operations and government bodies many millions of dollars to actively manage (Naidu et al., 2019). For example, the mining industry in Tasmania was established in the late 1800s with activities focussed in the west and north east of the state with a range of commodities sought including gold, copper, lead, zinc, silver and tin (Walshe and Heithersay, 1995). Today, hundreds of historic mine waste features remaining on the land surface (Figure 1) many of which require ongoing management. But, maps of historic mine locations should not be viewed as only conveying the distribution of acid forming materials, they also provide the location of concentrated outcrops of, often fine grained, sulphides. When considering the advances made in metallurgical processing technologies since the deposition of historical (ie late 1800s) waste and the changing thirst for commodities (ie increased demands for cobalt, lithium and REEs; Grandell et al, 2016) there is strength in the business case for processing mining waste. By adopting a geometallurgical characterisation approach (defined in Dominy et al, 2018) to mine waste this can be better defined as this extended abstract summarises using a case study example from Western Tasmania, Australia. CITATION: Parbhakar-Fox, A, 2019. Geometallurgy of tailings: unveiling the next generation of mineral resources, in Proceedings PACRIM 2019, pp 9497 (The Australasian Institute of Mining and Metallurgy: Melbourne).