Most often aqua regia assaying will employ partial digestion.
Chloric and Ntric acids.
Partial digestion is not full digestion.
Soluble Portion of elements see
atomic absorption srectrophotometry Undolubilized portion goes off to fire assay. ( au, ag, pl, pd, )
Issue ? Soluble portion provides a partial assesment of present elements.
Fire assay uses lead as flux to test for other elements.
Example - junior scans 36 element assay, sees small ppm of zinc.
Dismisses zinc.., not worthy of mentioning small ppm values.
Fire assay only looks for, ag, au, pl, pd values.
Fire assaying uses lead flux - some lead is skimmed some lead absorbs in cuplet cup.
If a lab does fire assay for zinc... the biggest question would revolve around,
would lead flux alter zinc detection ?
Cotton swabs atop acid test assays, would capture elements that sublime to gases.
Nitric acid rescting with HCl is very volatile. Gases are created.
Fire Assaying - Zinc does sublime - skips metal melt and goes to gas phase - up in gas. No metal.
- Zinc combines with lead - now think... lead flux skimmed off.
Apr 9, 2022 — Yes zinc sublimates,
but extra zinc is rabbaled into the molten lead, then skimmed off, https://goldrefiningforum.com/threads/fire-assay-why-some-ores-fail-parkes-process.30931/ Which is why...
Full acid digestion is best. ( fusion )
BATHURST HORSESHOE Brunswick Mines 6, 12 are located on thin geological lenses.
Surrounded by, CO, OT geology.
While Cariboo mine ( even deeper ) is in completely diff geology.
Other maps show a distinct horseshoe geology evolution.
Swirling geologies.
Did the formation begin at california lake then to caribou wedge, goodwin, halfmile, heathe,
then swing up into brunswick mines ?
Would heavier elements drop out on sagging horseshoe bends ?
Does one pitch.... let's try to find another 1200 m Brunswick in a geology " swirl " that could have shifted elsewhere ?
Or pitch... were seeking surface mineralization... Multiple locations.
Offering 200 m depths that span wider than Brunswick. Making it an equivelent to, Brunswick...without the depth.
Far easier than trying to duplicate another Brunswick, less pressure.