Analytical Suite Metadata

ODM Heavy Mineral Concentration and grain separation-VG counts [#2]

Overburden Drilling Management Heavy Mineral Concentrations and grain separation-Samples are sieved to < 1.7 mm. ¼ of sample concentrates sent for analysis (L86-01-23), the entire concentrate sent for analysis with samples FL8901-03).

General Methodology:

Overburden Drilling Management indicator mineral grain separation. The sample is split into a series of fractions as a precursor to mineral grain identification. This procedure is slightly different than the standard ODM flow chart.

A sample is disaggregated and screened with a 1.7 mm mesh . The < 1.7 mm fraction is pre-concentrated with respect to density using a shaker table. Samples are run twice through the shaking table and the concentrates are then panned, and gold grains are picked and counted and classified based on grain shape. The table concentrate is then put through diluted methylene iodide (specific gravity of 3.3) and the heavy mineral concentrate (HMC) is collected. The HMC is ferromagnetically separated. Samples from 1989 were not split.

(Description taken from Open File 3576)

1 Table Split (kg-wet) (Should equal 3 + 4)
2 Wet sieve > 1.7 mm fraction total) (kg-wet)
3 Wet sieve < 1.7 mm fraction total) (kg-wet)
4 Table concentrate (g-dry)
5 < 1.7 mm table concentrate methylene iodide (M.I.) separation (S.G. 3.3) -M.I. heavy fraction  ferromagnetic (g-dry)
6 < 1.7 mm table concentrate methylene iodide (M.I.) separation (S.G. 3.3) -M.I. heavy fraction non  ferromagnetic (g-dry)
7 Non-ferromagnetic fraction heavies ¼ split (g-dry)


Instrument: unstated

Sample material: solid

Sample weight: unstated

Analytical Technique:

Hierarchical classification

Technique >> Physical techniques >> Mineral grain separation



Analytical Decomposition:

Hierarchical classification

Decomposition >> None



Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  6003     Wt_TblSplt 
2  6185     Wt_gt_170 
3  6186     Wt_lt_170 
4  6047     Wt_TblConc 
5  6187     Wt_MI_HvyNFM_170 
6  6188     Wt_MI_Hvy_FM_170 
7  6189     Wt_NFMHvy25_SPLIT 

Associated Analytical Packages:

IndexPackage IDPackage Name
1  211     ODM Heavy Mineral Separation, VG counts (<1.7 mm fraction)
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