1993 - NELSON - TALUS SAMPLING The 1993 sampling program on the Nelson claim group consisted of a series of composited talus samples of -112 inch material screened from talus collected along traverses across the northern and southern talus slopes at the foot of Nelson Glacier walls.
PAGE 21 - TALUS SAMPLING
https://aris.empr.gov.bc.ca/ArisReports/23123.PDF
No mention of depth = i'll assume samples were extracted = at surface.
Material was screened = 1/2 inch size collected
= i envision malachite + azurite copper leaching into deeper strata.
= maybe higher concentration
Discusses -
what size of ore to sample - smaller particles mineral values drop off,
- larger samples increases mineral values
- 1/2 inch size was arrived at - hmmmm
Good to see there was a discussion on what size of samplling to run with.
But... a density value was not mentiuoned. ( own personal thought )
Think about it... a hard rock sample has intense - density - particles are really tight.
versus a soft silt or talus sample that is loose.
Could a talus sample - be inferrior to a hard rock sample ?
would a one cubic centimeter talus sample be same as
one cubic hard rock sample ?
of course not... density wins... far more mineral mass in a hard rock.
therefore -i would say... a hard rock sample should be weighed
and a talus sample should match the weight of the hardrock sample
in order to make a fair assessment of the - minerals.
Eample - one cubic centimeter of, loose talus
one cubic centimeter of hard rock
= hard rock weighs more = more mineral content
Testing the TALUS only surficially - is well.. lame.
As mentioned in prior post - the azurite and malachite copper are oxides.
surfuicial mineral ores atop surface - in fine talus - which are oxides - will leach out.
oxides are not stable - they're broken down - any amount of rain water or other, will
strip the oxide copper and they'll - leach out - testing talus - at depth - is needed.
Secondly. how the talus samples are tested by weight and ore density - is important.
how the talus samples are multi acid tested - is important.
obviously there's an error factor as mentioned in report - which can skew the values.
There's a mineral chart finding - with in pdf.
- good zinc values - considering surface tests
- few good copper ppm - again - considering only at surface
- never understood why geologists - only skim the surface... i'd be like a - ground hog... lol
- i feel the talus soils never really seen a deep - thorough - testing.
- if the copper values were only 1% in hardrock above - i wouldn't be so adamant.
- but... the copper vlaues seen in rocks above - run... 3% - 6% or higher...
- that kind of copper rock - eventially decays - ends up in the talus.
= recheck the talus ores - 3m deep.
= even if just 20 randon cores...
So... yeah,
Test the talus soils again.
Minerals values often increase in at depth - especially if copper oxides have leached.
Cheers...