Have done some research on the tenements that SUM holds in...

Have done some research on the tenements that SUM holds in Brazil.

The Paraiba region hosts TOURMALINE deposits. They are considered
to be of high quality, and can sell for between $1,500 and $30,000 ct.

Hence, the mine shafts scattered over tenements that SUM holds.
The old boys were looking for TOURMALINE gems, to make them rich.

Tourmaline has Piezoelectric properties, which means it can generate
an electric charge, when applied to a mechanical operation.

The host bedrock, has now been shown to have Niobium and Tantalum.
This has been discarded as waste in the past. Only looking for gems.

Bit like opal mining. Looking for the gems, and throw away the potch.
Then after a good rain, the noodlers, find some money. I digress.

For the geo to be on an excavator, to me, indicates, he is aware of
the potential of the area, and how to maximise it's potential.

Excavate the soil, send to washing plant, see what you get.
Gems, or send the slew with Nb &Ta to processing plant.

Will it happen? I don't know, but this is an area with proven resources.
GLTAH