@Barry81 I think you've completely missed the point about the...

@Barry81 I think you've completely missed the point about the nature of the gold system they are zeroing in on. What's in the surface gravel is neither here nor there, apart from showing the way to the real prize in the bedrock below. The RAB drilling is just the cheapest form of reconaissance drilling to punch through the overburden down to the rock:

A key objective of the drilling was to not only identify gold mineralisation in the bedrock, but also to understand the subsurface geology that is potentially hosting the mineralisation and to determine the most suitable exploration and targeting techniques for future programs.

The size of the underlying gold system appears to be massive, with Naujombo and Kishugu 35km apart but part of the same structure:

The scale and level of gold anomalism at Naujombo is similar to that of Kishugu, with the two anomalies located 35km from one another, in a very similar structural setting. Figure 8 illustrates that Naujombo and Kishugu are associated with the same structural corridor and are located on the margin of similar circular magnetic features. The potential exists to identify a significant gold camp should the anomalies confirm the presence of economic gold mineralisation. Both anomalies also exhibit very similar multi-element signatures typical of primary gold mineralisation (arsenic, bismuth and silver).