Antipa Minerals Limited (ASX: AZY) reports that joint venture partner Rio Tinto has intersected significant precious metals mineralisation in the Citadel Joint Venture Project 2020 Exploration Programme in Western Australia’s highly prospective Paterson Province.
Rio Tinto Exploration Pty Limited is managing the drilling programme which has hit sizeable widths of gold-copper±silver mineralisation, including substantial high-grade gold mineralisation outside the existing Calibre Mineral Resource boundaries.
Significant assay results include: 146.7m at 1.36 g/t gold and 0.08% copperfrom 95.9m down hole in CALB0027, including: 101.0m at 1.81 g/t gold and 0.05% copperfrom 95.9m, also including; 35.70m at 2.08 g/t gold and 0.15% copperfrom 96.3m, including; 3.9m at 9.51 g/t gold and 0.25% copperfrom 120.0m; 3.2m at 3.11 g/t gold and 0.10% copperfrom 128.8m; and 6.0m at 2.93 g/t gold and 0.03% copper from 147m.
The available 2020 DD and RC drill hole assay results from Calibre confirm:
- Significant gold‐copper±silver mineralisation along a 550m strike and up to 370m below the northern sector of the current Mineral Resource;
- Mineralisation now extends up to 570m below surface, up to 300m across strike and over a total strike length of approximately 1,500m; and
- The mineralisation is interpreted to be closed off to the north, with the existing northern limit of the Mineral Resource likely to remain materially unchanged.
The objective of the Citadel 2020 Exploration Programme was to test potential extensions and further define and improve ore body knowledge at the Calibre deposit as well as to test certain greenfield targets.
The Calibre and Magnum deposits are part of the Citadel Project’s large 1,330 sq. km tenure. Within the Citadel Project, the mineralised material is covered by desert sand and generally soft ‘free‐dig’ sediments to a depth ranging between just 10 to 100m.
Calibre and Magnum currently constitute global Mineral Resources of 63.8Mt at 0.8 g/t gold and 0.2% copper for 1.6Moz gold and 127kt copper with Calibre having a Mineral Resource of 47.7Mt at 0.9 g/t gold and 0.15% copper for 1.3Moz gold and 69,500t copper and Magnum having a Mineral Resource of 16.1Mt at 0.7 g/t gold and 0.37% copper for 339,000oz gold and 57,800t copper.
Both deposits are located approximately 45km east of Rio Tinto’s Winu copper‐gold‐silver deposit, which Rio Tinto is continuing to explore and advance development studies on. On 28 July 2020, a maiden JORC 2012 Inferred Mineral Resource of 503Mt at 0.35% copper, 0.27 g/t gold and 2.15 g/t silver (containing 4.4Moz of gold, 1.8Mt of copper and 35Moz of silver) was announced for Winu.
Results to date indicate Calibre represents a very large‐scale mineral system with material potential exploration upside under just 80m of cover, with a strike length of approximately 1.6km, up to 480m thick and open in several directions.