Analytical Suite Metadata

ODM Heavy Mineral Concentration and grain separation [#1]

Overburden Drilling Management Heavy Mineral Concentrations and grain separation.

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 +/-10 kg split from the bulk sample is disaggregated and screened with a 2 mm and 1 mm mesh respectively. The < 2 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. 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 and the non-ferromagnetic heavy mineral concentrate (NFM-HMC) is screened to recover the 0.25-0.50 mm and 0.5-1.0 mm fractions are counted for various indicator minerals.Weights for each of these steps are not reported in the appendices.

(Description taken from Open File 3449)

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

Associated Analytical Packages:

IndexPackage IDPackage Name
1  200     ODM Heavy Mineral Separation, VG counts (<2 mm fraction table processed) and HMC Indicator mineral picking
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