Analytical Suite Metadata

ODM Heavy Mineral Concentration and grain separation-VG counts [#1]



Overburden Drilling Management Heavy Mineral Concentrations and grain separation-1-2 mm fraction not table processed. < 1 mm fraction not sieved.

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.

The sample is disaggregated and screened with a 2 mm and 1 mm mesh respectively. Pebbles are screened from the > 2mm fraction and counted and classified. The < 1 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 3.2) and the heavy mineral concentrate (HMC) is collected. The HMC is ferromagnetically separated. The 1-2 mm fraction is separated using methylene iodide (SG 3.2) and separated magnetically with a hand magnet.

(Description taken from Open File 3576)

1 Total sample weight (kg-wet)
2 Oversize clasts (>2 mm) (kg-wet)
3 Wet sieve < 2 mm fraction total) (kg-wet)
4 Total 1 – 2 mm fraction (g-dry)
5 1 – 2 mm table concentrate methylene iodide (M.I.) separation  -M.I. heavy fraction  ferromagnetic (g-dry)
6 1 – 2 mm table concentrate methylene iodide (M.I.) separation  -M.I. heavy fraction non  ferromagnetic (g-dry)
7 < 1 mm table concentrate (g-dry)
8 < 1 mm table concentrate methylene iodide (M.I.) heavy fraction ferromagnetic total (g-dry)
9 < 1 mm table concentrate methylene iodide (M.I.) heavy fraction non-ferromagnetic total (g-dry)

 

Instrument: unstated

Sample material: solid

Sample weight: unstated


Analytical Technique:

Hierarchical classification

Technique >> Physical techniques >> Mineral grain separation

Children

None


Analytical Decomposition:

Hierarchical classification

Decomposition >> None

Children

None


Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  6043     Wt_Processed 
2  6044     Wt_OvrSize 
3  6045     Wt_100_200 
4  6178     Wt_MIHvyNFM100_200 
5  6179     Wt_MIHvy_FM100_200 
6  6183     Wt_MIHvyNFM_lt100 
7  6184     Wt_MIHvy_FM_lt100 

Associated Analytical Packages:

IndexPackage IDPackage Name
1  207     ODM Heavy Mineral Separation, VG counts (<1 mm fraction table processed) and HMC Indicator mineral picking
2  210     ODM Heavy Mineral Separation, VG counts (<1 mm fraction table processed)
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