RE: 52g per ton22 Apr 2022 09:45
How deep are the rich veins at Fosterville anyone...... hmmm?
How deep are we currently drilling at HR3? We are still just understanding the layout here. Imagine the vein runs deeper and widens at depth.....
'Mineralization at Fosterville is controlled by late brittle faulting. These late brittle faults are generally steeply west dipping reverse faults with a series of moderately west dipping reverse splay faults formed in the footwall of the main fault. There are also moderately east dipping faults which have become more significant footwall to the anticlinal offsets along the west dipping faults. Primary gold mineralization occurs as disseminated arsenopyrite and pyrite forming as a selvage to veins in a quartz–carbonate veinlet stockwork. The mineralization is structurally controlled with high-grade zones localized by the geometric relationship between bedding and faulting. Mineralized shoots are typically 4m to 15m thick, 50m to 150m up/down dip and 300m to 1,500m+ down plunge, and have average grades of 5 10 g/t Au, with individual assays up to 60 g/t Au.
Primary gold also occurs as visible gold at Fosterville, where it variably overprints sulphide mineralization, and is found as disseminated fine specks (>1 mm) of gold within host quartz veins. The visible gold is spatially associated with antimony mineralization, in the form of stibnite that occurs with quartz and varies from replacement and infill of earlier quartz-carbonate stockwork veins, to massive stibnite-only veins of up to 0.5m in width. The stibnite-quartz event occurs in favorable structural locations, such as the Phoenix, Eagle and Lower Phoenix structures.
The occurrence of visible gold is becoming increasingly significant at depth and is observed more frequently below an approximate 800m with depth, down-plunge within the Lower Phoenix and Harrier Gold Systems.
Examples of the visible high-grade gold zones include the Eagle and Swan Zones in the Lower Phoenix area. The Eagle Zone is 0.5 6m in width, 50 80m in dip length and has a down-plunge extent of 700m. The Swan Zone, currently the highest-grade mineralized zone at Fosterville, is 2-5m in width, dips west and is presently defined over a 275m strike and a 200m vertical extent. The Eagle and Swan Zones remain open down-plunge for potential Mineral Resource expansion.
Hmmmmmm