RE: Porphyry System29 Nov 2021 09:51
On angles, I find drawing a diagram always helps avoid elementary trig ****ups. Case in point this morning :-)
It does seem based on just hole 1 that economic grades can be achieved below 300m depth, but that the overburden can still contribute. Look forward to seeing the rest of the assays and initial geological model.
An inferred JORC with just 5 holes would be preliminary, but could be enough to produce a conceptual open pit model, much like Xtract Resources have done this year for their prophyry copper (and now gold) at Bushranger in NSW, with a max depth of 600m. https://xtractresources.com/wp-content/uploads/XTR-Presentation-14.10.2021.pdf page 22.
Bingham Canyon mine located south-west of Salt Lake City, Utah, US, is the deepest open pit mine in the world at more than 1.2km deep and 4 km wide. Chuquicamata copper mine, situated 1,650km north of Santiago, Chile, is second deepest at 4.3km long, 3 km wide and 850m deep. Third is Escondida copper mine located in the Atacama Desert, Chile, Escondida pit is 3.9km long, 2.7km wide and 645m deep.
GLA all.