RE: Rns1 Sep 2021 11:16
Saddlereef
Saddle Reefs target within the Black Hills licence a strongly silica-carbonate-albite-sericite altered and quartz-pyrite veined zone in Yeneena Formation metasediments was logged from 226m – 239m in drill hole BHD001. Assays reported an intersection of 3.5m @ 1.88g/t Au from 226.5m (incl. 1.4m @ 3.49g/t Au from 227.6m) from the quartz – pyrite vein stockwork zone within the larger alteration halo. A strong silver- arsenic- cobalt- antimony- bismuth pathfinder metal association was noted throughout the zone, with minor copper – molybdenum anomalism also identified. Structural analysis suggests the quartz-pyrite veins form an array of flat veins within a bedding parallel envelope, representing reef style mineralisation. The results are encouraging as mineralisation style and metal affinities are similar to reef style veins in the nearby Telfer deposit.
Telfer
In 1991 surface exploration diamond drilling intersected the I30 quartz reef within the Main Dome at 1000 m below surface. A mining feasibility study was completed in 1995 and a decline was commenced that reached ~500 m below surface by July 1997. An underground drilling program ensued, followed by a study of how to best extract the series of deep high grade reefs that were discovered. This work outlined a high grade core reserve in the I30 Reef of 1 Mt @ 15.6 g/t Au, 2.6% Cu, surrounded by a larger tonnage, lower grade gold and copper stockwork. This was, in turn, was part of an even larger underground resource on the eastern limb of the Main Dome associated with an additional eight hanging wall and three footwall reefs, collectively known as Telfer Deeps.
http://www.portergeo.com.au/database/mineinfo-mb.asp?mineid=mn224
Saddlereef what’s down below?