Copper explorer and developer KGL Resources (ASX:KGL) has discovered a massive sulphide zone with copper grading up to 6.74%, gold up to 8.72 grams per tonne (g/t) and silver up to 454.72 grams per tonne at the Rockface North Lodes in the Northern Territory. Three holes returned from drilling all found strong copper mineralisation, with a massive sulphide brecciated vein intersected in one hole, with the mineralisation at the down deep margin of Rockface North Lodes. This intersection contained high-grade copper and gold together with significant grades of zinc, lead and silver, with notable f…