OZ Minerals Limited announced that it has released updated Mineral Resources and Ore Reserves estimates for Prominent Hill, Carrapateena and Antas North as at 30 June 2020. The Carrapateena Mineral Resource has been updated to include drillhole data acquired between June 2019 and June 2020 along with information collected from Underground development and allows the evaluation of both sub-level cave and block cave mining potential with copper metal increasing by ~4% to 5,400kt and gold metal increasing by ~3% to 7,600 koz. The Carrapateena Ore Reserve has been updated with no material change when compared to the Ore Reserve as at 31 May 2020. The accelerated decline development at Prominent Hill mine which supports increased mining rates to 4-5Mtpa 1 from 2022 has brought forward underground volumes and consequently reduced the current mine life from 2031 to 2030. The increased mining rates and inclusion of existing marginal-grade stockpiles will maintain the plant at full capacity to the end of 2024, eighteen months longer than originally planned. The Prominent Hill Expansion Study Update released on November 16, 2020 contemplates the installation of a vertical hoisting shaft to replace truck haulage with the potential to extend mine life upon further conversion of Mineral Resources to Reserves with an update to the Ore Reserve expected in mid-2021. Increases in Mineral Resources were primarily due to the change in cut-off grade and inclusion of marginal-grade stockpiles previously classified as waste partially offset by depletion of existing surface stockpiles and ongoing mining of the underground Mineral Resource. Decreases in Ore Reserves were primarily attributed to depletion through mining and stockpile processing. Underground Ore Reserve tonnes have remained broadly in line with the prior year with depletion partially offset by additions through improved confidence in a subset of the Underground part of the Mineral Resource and changes to the Mineral Resource model along with changes in the mine design. Ore Reserve stockpiles decreased by ~19% to 18Mt, with copper metal down ~50% and gold metal down ~26%. Decreases to stockpiles were primarily due to processing and partially offset by the inclusion of existing marginal-grade stockpiles while the reduction in metal is due to the preferential processing of high-grade stockpiles. The decrease in the Antas North Mineral Resources was primarily due to the revision of previous reasonable prospects of eventual economic extraction limits and depletion, due to ongoing mining of the open pit Mineral Resource partially offset by the inclusion of marginal-grade stockpiles previously classified as mineralised waste. No Ore Reserve was estimated in 2019. The 2020 Antas North Ore Reserve has been estimated at 0.6Mt at 0.9% Cu and 0.4 g/t Au. This estimate includes Ore Reserves between the closing 30 June 2020 excavated mine surface and the final Antas open pit design and includes closing ROM surface stockpiles.