FORD - Not sure on that subject, Ford.
I would assume it would involve ( ultra vilolet / gamma ) light spectrums.
Using laser ( extreme photon electron ) tech... to penetrate ?
I myself... have wrote about using - electrical resistivities and zeroing in on each electron structure of a particular mineral - via - their own electron signature trait - Using thier own electron configurations as a messenger and simply code the resistivity tech to match the same electron resistivity as the targeted mineral one wishes to find.
Few years back...
I was researching thisusbject on better mineral detection.
I was irked seeing do many juniors or is it... detection companies fail in locating minerals.
Most al lsought the - red - color targets. ( MAGS )
And.. most struck out.
It was then... i began studying the lighter resistivities...
Pulling away from the iron targets...
Comparing other actual discoveries that werre in the - yellow and green zones.
Too many rely on fault lines, andA typical irons for MAG resistivities.
Most fauls turn about to be simple fissures..
Not actual hydrogeothermal.
And... there is where the prob lies.
Most are tought - to think, geothermal.
When... many of the deposits are - reconsolodated, replacement deposits.
If it's not colcaic blacks... i always question the sulphides.
Sulphide termiology is used too loosely.
Wink.
I am perhaps the only one that i know or with al lthe paers i've read...
has coined, that it could be possible that most veining in deposits could be - post - formed.
Secondary deposits that reconsolodated.
Salts are crystals, so are silicates.
There's more to these crystal structures than just - hot geothermal fluid created.
You get the right combination of, sulphide meet alkais and there's chemical reactions.
Which ultimately can cause oxidation and crystalization.
Hnece... i don't always place my mind in aframe of - geothermal.
Some of the largest mines in the world,
Are replacment deposits.
The easy breezy mines and that multiple decades of ores.
Yup.. they always get the easy projects.
lol
I keep it simple.
Ocean - sediments.
Uplift. Overlay, build mountains.
Different sedimentry banding - different geology dependent on region - sediment errosion - silts and tills andclays - disseminated = replacement depsoits.
Geothermal - actual faults - hot fluids.
Chloric intrusions - which i tend ot think the Quebec + Ontario green stone belts seen..
And... molten magma volcanics. ( young and old systems )
Cheers....