Gold content far exceeds my expectations. Its not the only spoil heap in the option area either. Grades about the same as a South African gold mine. 20kg of gold there possibly at minimal cost as a surface reserve. £800k worth.
It's not the end result of the demonstrably efficient pilot plant that's the issue nor in itself the time taken to set it up, its the reluctance to report substantial but understandable delays to progress. This introduces some doubt,
In due course, when sufficient data is gathered from exploration then a preliminary economic assessment PEA will be produced which will detail expected grades, quantities, costs of extraction, processing and cut off grades. There's plenty of ore at 2 g Au /T ore. If the revenue from that can sustain the mine, the big profits will come from the irregularly located bonanza grade areas.
@notforalongtime The recent results are gold content of concentrate produced largely from already mined areas. Equally important are the gold content of the tailings. What it shows is the pilot plant is very efficient at extracting gold. The ore grade is unknown as mass of the samples used is not stated. Previous rns states mass of bulk samples but whether or not all of it was used is unknown. What is of more relevance is ore grade of ore won from unlined areas. For that, you'll have to wait. Old spoil heap material is also being tested, although the content is not expected to be high, the cut off grade is low as the cost of putting it in the plant is also very low
@notforalongtime The nature of the deposits are that there are isolated zones which contain very rich deposits. The reason for this according to Mason, is that quartz was deposited from superheated water in four distinct geological events that filled cracks in the rock with quartz containing gold. The second event deposited the ultra rich mineralised quartz. Some Past mining was non selective, the mine averaged 17 g Au / T historically. The unmined areas are generally below the current ground water table, with the exception of the lower llechfraith levels which were the last to be worked using pumps. The 1976 memoir notes visible gold in that area. We eagerly await permission from natural resources Wales to discharge pumped minewater to take a look in that area.