Barker Minerals Ltd (BML)

[echarters]

Figures are a little screwed here. Total weight should be 2930.08 pounds. The tonnage factor for the ore at 165.43 pounds per cubic foot is 2000/165.43 = 12.089.

Also voids in a sand are generally figured at 40%. This varies.

In clay you are right. Avoid it if possible in contruction as it
is treacherous to build on and hard to work with. Costs double easily in excavation. Terrible stuff.

It is very common in placer areas as it forms an impermeable bed of concentration or a psuedo-bedrock base. It is common to find loose blue clay in some BC placer areas. The loose stuff which is really glacial till, is not much of a problem, but too much slime clay has been known to act as a flotation agent for gold. You can use surfactants to increase wetting but they clog up sluices. Hi-G machines that use centrigal force are much less affected by these problems.

Then Ross Box was developed to combat clay in placers. Trommels and water sprays have also been found effective.

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