OREAS 135b has been prepared from a blend of black slate and Zn-Pb-Ag ores from the Dugald River and Cannington deposits located in Northern Queensland, Australia.
Twenty-six commercial analytical laboratories participated in the program to certify:
- Majors & base metals by oxidising fusion with X-ray fluorescence finish;
- Loss on ignition at 1000° Celsius;
- Total Sulphur by infrared combustion furnace or C/S analyser;
- Full ICP-OES and MS elemental suites by peroxide fusion;
- Full ICP-OES and MS elemental suites by 4-acid (HNO3-HF-HClO4-HCl) digestion;
- Full ICP-OES and MS elemental suites by aqua regia digestion.
| CRM Code |
Principle Certified Values |
State |
Matrix |
Mineralization |
| OREAS 135b |
Zn 2.73% |
Pb 1.71% |
Ag 52.9ppm |
primary |
sulphidic graphalitic slate |
SEDEX |