Mining was completed at Vivien in early 2023, with the last ore load coming to surface on 11 January 2023. Provisional gold production for Vivien over the period of Ramelius ownership (2015-2023) was 1,500,000 tonnes at 5.69g/t Au for 260,000 ounces with final mill reconciled production figures and notional cashflow to be reported in the March 2023 Quarterly Report.
The Vivien gold deposit is located near the Agnew Gold Mine, 15 km west of the town of Leinster in Western Australia.
Historical underground production from the Vivien leases between 1902 and 1911 totalled 76,000 oz at an average grade of 12.4 g/t Au. The Vivien open pit was mined between 1997 and 1998 and produced 410,000 tonnes at 2.70 g/t Au for 35,600 oz.
Mineralisation occurs within a high-grade quartz vein, hosted by a dolerite-gabbro unit. The veins trend 028° magnetic and dips steeply (70°) to the SE. The quartz vein/lode averages 2.7m width and has significant strike and dip continuity (≈500m). The high-grade zones are generally wider and sulphide rich, with pyrrhotite and arsenopyrite being the dominant sulphide species.
High-grade quartz-pyrrhotite vein in ore drive face
During 2013, Ramelius undertook resource and exploration drilling of the deposit and completed a mining feasibility study and statutory approvals. A mining inventory of 400,000 t at 7.9 g/t for 109,000 oz was generated.
The underground project commenced in May 2015. At 30 June 2019. The latest reconciled production stood at 1,428,751t @5.73 g/t for 254,745 oz (September 2022).