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OREAS Newsletter, May 2015

 

New OREAS CRM suites already released this year:

  • six new epithermal Ag-Cu-Au ore CRMs (OREAS 600 series)
  • two medium grade Mn ore CRMs (OREAS 171 & 172)
  • five new VMS Zn-Pb-Cu-Ag-Au ore CRMs (OREAS 620 series)
  • six new carbonatite-hosted REE ore CRMs (OREAS 460 series)

 Upcoming OREAS CRM suites:

  • four Cu-Au oxide ore CRMs (OREAS 905-908), available late August
  • three greenstone-hosted Au ore CRMs (OREAS 214 to 216 with 3.0ppm, 3.5ppm and 6.6ppm Au, respectively), available September
  • Merensky Reef PGE ore CRMs, available early November
  • five IOCG CRMs to replenish our existing IOCG stock (see OREAS 59a, 59b, 59c and 59d), new stock available October

 Many of these suites will come under the SuperCRM classification we introduced last year (i.e. incorporate full ICP-OES and ICP-MS suite certifications). Details of the suites mentioned above are shown below along with a brief description and their expected grades.

 

1. Five VMS Zn-Pb-Cu-Ag-Au CRMs (available now)

OREAS 620 to 624 are sourced from MMG’s Golden Grove mine in Western Australia.

 

OREAS

Cu %

Pb %

Zn %

Ag ppm

Au ppm

620

0.18

0.77

3.15

40

0.68

621

0.36

1.36

5.22

69

1.25

622

0.48

2.21

10.2

103

1.85

623

1.73

0.25

1.0

22

0.83

624

3.10

0.62

2.4

46

1.16

  

Certification program includes:

• Full elemental suite by sodium peroxide fusion with ICP-OES & MS; 

• Full elemental suite by 4-acid digest and by aqua regia digest with ICP-OES & MS;

• Limited suite by 3-acid digest with ICP-OES & AAS; 

• Au by fire assay and by aqua regia digest with ICP finish;

• S by Leco.

   

2. Six carbonatite-hosted REE CRMs (available now)

OREAS 460 to 465 (ranging 0.53-9.88% TREO) are sourced from Lynas Corporation's Mount Weld Mine in WA, Australia.

  

OREAS

CeO2 ppm

La2O3 ppm

Nd2O3 ppm

Pr6O11 ppm

Nb2O5 ppm

Total REO%

460

2209

1606

911

294

998

0.53

461

4311

3155

1900

590

1854

1.06

462

6082

4450

2985

888

2070

1.54

463

8100

5824

4295

1212

2139

2.08

464

1.88%

1.37%

1.16%

3138

2723

5.10

465

4.86%

2.83%

1.37%

4557

6695

9.88

 

 REE suite XRF package;

• Full elemental suite by 4-acid digest with ICP-OES & MS;

• Full elemental suite by borate/peroxide fusion with ICP-OES & MS; 

• Thermogravimetry for Loss on Ignition at 1000 degrees celsius.

  

3. Four Cu-Au oxide ore CRMs (available late August)

OREAS 905 to 908 consist of oxide copper-gold ore sourced from MMG’s Golden Grove deposit in Western Australia. Target grades:

 

OREAS

Cu %

Au ppm

Ag ppm

905

0.14

0.36

0.43

906

0.30

0.05

0.7

907

0.61

0.1

1.3

908

1.20

0.19

2.3

  

4. Three greenstone-hosted Au ore CRMs (available September)

OREAS 214 to 216 consist of primary gold ore sourced from Doray Mineral’s Andy Well deposit located north of Meekatharra in Western Australia and blended with Cambrian greenstone from Heathcote quarry in northern Victoria, Australia. Target grades:

 

OREAS

Au ppm

214

3.0

215

3.5

216

6.6

  

5. Four Merensky Reef PGE ore CRMs (available early November)

OREAS 680 to 683 will be sourced from Anglo American Platinum’s Dishaba Mine in South Africa.

Certification program to include:

• Pt-Pd-Au by Pb fire assay;

• Pt-Pd-Ru-Rh-Ir-(Os)-Au by NiS fire assay;

• Ni, Cu and full suite ICP-OES and MS by aqua regia digestion;

• Ni, Cu and full suite ICP-OES and MS by four acid digestion.

  

6. Five IOCG ore CRMs (available October)

Target grades:

• 0.29% Cu, 0.2ppm Au

• 0.6% Cu, 0.3ppm Au

• 0.9% Cu, 0.6ppm Au

• 1.7% Cu, 0.8ppm Au 

• 2.75% Cu, 1.8ppm Au

 

- Craig L Hamlyn

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