If mining at the surface produces a promising amount of gold...

If mining at the surface produces a promising amount of gold does that mean we have disseminated mineralisation?

No. Disseminated is used by BBX to describe the mineralisation, i.e. fine-grained ore minerals are distributed evenly throughout the rock, like sultanas in a cake.

Is it possible that the chips taken at the surface are not representative of the composition of the underlying rock?

No. They are sampling fresh rock. It's no different to the rest of the gabbro body at depth. The fact that unweathered portions of it are exposed at surface changes nothing.

For example could leachate containing mineralised gold percolate through interstices and deposit gold in the surface boundary resulting in the gold being concentrated there but NOT disseminated evenly?

No. Anything that happened to a rock caused by exposure to the earth's surface is part of weathering. We are talking about fresh rock. Some of the gabbro is weathered but they only sampled fresh rock.

I'm done. DYOR.