Geology 101Zn-bearing minerals that act as indicator minerals for base metal sulphide mineralization is hosted by the volcanic rocks and has similarities with volcanic-hosted massive sulphide deposits in other parts of the world. Most of the prospects have strata bound, moderately to steeply dipping, multiple, sub-parallel sheet like ore bodies composed of disseminated and semi-massive to massive ores.
Horizontal drilling is used by mining companies in remote locations. North Rackla is overlaid by thick overburden.