Analytical Suite Metadata

ODM HMC grain separation



Overburden Drilling Management grain separation.  The sample is separated into several size and magnetic fractions, as a precursor to mineral grain identification.  The procedure corresponds to the standard ODM flow chart.

General Methodology:

Overburden Drilling Management indicator mineral grain separation.  The sample is separated into several size and magnetic fractions, as a precursor to mineral grain identification.  The procedure corresponds to the standard ODM flow chart.

The sample is disaggregated and screened with a 2mm mesh.  The <2 mm fraction is pre-concentrated with respect to density using a shaker table.  The table concentrate is then put through diluted methylene iodide (specific gravity of 3.2) and the heavy mineral concentrate is collected.  After a ferromagnetic separation, the nonferromagnetic heavy mineral concentrate (NFM-HMC) is screened to recover the 0.25-0.50 mm, 0.5-1 mm and 1-2 mm fractions for indicator mineral picking.  Numerous weights are recorded during the procedure, as listed in the table below:

1 Bulk received (kg)
2

Table split (kg)

(usually 0.5 kg less than the bulk received)

3 Oversize clasts ( > 2 mm) (kg)
4 Table feed
5

< 2 mm table concentrate total (g)

(should equal the sum of rows 6 + 7 + 8)

6 < 2 mm table concentrate heavy liquid separation – heavy liquid lights (g)
7 < 2 mm table concentrate heavy liquid separation – magnetic HMC (g)
8 < 2 mm table concentrate heavy liquid separation – non-ferromagnetic HMC total (g)
9

< 2 mm table concentrate heavy liquid separation – non-ferromagnetic HMC processed split total (g)

(usually equal to row 8)

(should equal the sum of rows 10 + 11 + 12 + 13 + 14)

10 < 2 mm table concentrate heavy liquid separation – non-ferromagnetic HMC processed split – < 0.25 mm (wash) (g)
11 < 2 mm table concentrate heavy liquid separation – non-ferromagnetic HMC processed split – < 0.25 mm (g)
12 < 2 mm table concentrate heavy liquid separation – non-ferromagnetic HMC processed split – 0.25 to 0.5 mm (g)
13 < 2 mm table concentrate heavy liquid separation – non-ferromagnetic HMC processed split – 0.5 to 1 mm (g)
14 < 2 mm table concentrate heavy liquid separation – non-ferromagnetic HMC processed split – 1.0 to 2.0 mm (g)

(Source of description?; very similar to suite # 247)

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  6001     Wt_BulkRec 
2  6003     Wt_TblSplt 
3  6004     Wt_OvrSize 
4  6005     Wt_TblFeed 
5  6020     Wt_TblConc 
6  6008     Wt_Lght_HL 
7  6009     Wt_Ferr 
8  6010     Wt_NonFerr 
9  6021     Wt_NonFerrSplit 
10  10  6012     Wt_Fn_Wash 
11  11  6011     Wt_Fn_Post 
12  12  6013     Wt_25_50 
13  13  6014     Wt_50_100 
14  14  6015     Wt_100_200 

Associated Analytical Packages:

IndexPackage IDPackage Name
1  161     ODM IM processing (standard KIM and MMSIM procedure)
2  187     ODM Heavy Mineral Separation and VG counts (<2 mm fraction table processed)
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