Internationally respected geochemist Dr Nigel Brand recently published the results of an investigation into the homogeneity of commercially available gold ore Certified Reference Materials (CRMs). His findings were reported in the December 2015 issue of the Association of Applied Geochemists EXPLORE Newsletter. Four CRMs from each of five leading manufacturers were evaluated at the key grades of 0.5 ppm, 1 ppm, 3 ppm and 9 ppm gold. We are proud to announce that OREAS was the only manufacturer to achieve excellent homogeneity across all four CRMs. If you would like to know more about how much your CRMs are contributing to the noise in your QC data click here. The article makes for a very interesting read.
Latest CRM releases
Four Cu-Au oxide ore CRMs
OREAS 905 to 908 are a suite of four oxide copper-gold ores sourced from MMG’s Golden Grove deposit (WA).
Prices (AUD): $3.50/ 10g unit, $9.35/ 60g unit and $77.50/ 500g jar.
Five IOCG ore CRMs
OREAS 520 series are a suite of iron oxide, copper-gold ore CRMs sourced from Glencore’s Ernest Henry Mine (QLD). Some key Certified Values for the five new OREAS SuperCRMs® are shown below.
Au by fire assay, Cu and Co by 4-acid digest, S by infrared combustion furnace. Prices (AUD): $3.45/ 10g unit, $9.35/ 60g unit, $15.58/ 100g unit and $77.50/ 500g jar.
Certification program includes:
Au by Fire Assay (25 to 40g charge weight) with ICP-OES or AAS finish;
Au by aqua regia digest (15 to 40g sample) with ICP or AAS finish;
Full elemental suite by aqua regia digest with ICP-OES & MS;
Full elemental suite by 4-acid digest with ICP-OES & MS;
Full elemental suite by peroxide fusion with ICP-OES;
Ag, Cu, Co, Fe, Mo and S by 3-acid digest with ICP-OES finish;
Total S by IR combustion furnace (Leco) and
Specific Gravity (SG) by pycnometer.
Pb and Zn concentrate CRMs
OREAS 350 to 352 are two Zn and one Pb concentrate products sourced from Glencore’s McArthur River Pb-Zn-Ag SEDEX mine located in the Northern Territory. Some key certified values are shown below.
Price (AUD): $4.57/ 10g unit.
New upcoming CRMs for 2016
Five OXIDE Au ore CRMs (available now)
OREAS 253 to 257 are oxide gold ores (weathered greenstone) sourced from Doray Mineral’s Andy Well deposit located north of Meekatharra (WA) and blended with weathered basaltic scoria material. Target grades shown below.
Please note that OREAS 253 will not be available until September.
Two Ni laterite and three Sc-Ni-Co ore CRMs (available early Q4 2016) The lateritic nickel-cobalt ore CRMs are sourced from the Bulong deposit (WA) and the limonitic scandium (Ni-Co) ore CRMs are sourced from an advanced mining project in NSW. Target grades:
Certification program to include: 1. Ni laterite package + Sc by borate fusion with XRF. 2. Full package (including Cu, Ni, Co & Sc) by fusion ICP-OES.
Three greenstone-hosted Au ore CRMs (available November 2016)
These are primary gold ores sourced from Doray Mineral’s Andy Well deposit located north of Meekatharra (WA) and blended with fresh greenstone. Target grades shown below.
(replaces OREAS 201)
(replaces OREAS 204)
(replaces OREAS 12a)
Five platinum ore CRMs (available late Q4 2016) OREAS 680 to 684 are sourced from Anglo Platinum’s Dishaba Mine in South Africa. Target 4E PGE grades are shown below. Note: 4E PGE = Pt + Pd + Rh + Au
Certification program to include:
1. Pt-Pd-Au by Pb fire assay with ICP-OES or MS;
2. Pt-Pd-Ru-Rh-Ir-(Os)-Au by NiS fire assay with ICP-MS;
3. Ni, Cu and full suite by peroxide fusion ICP-OES & MS;
4. Ni, Cu and full suite by four acid digestion ICP-OES & MS.
Six greenstone-hosted Au ore CRMs (available early 2017)
These are primary gold ores sourced from Doray Mineral’s Andy Well deposit located north of Meekatharra (WA) and blended with fresh greenstone.
Target grades shown below.
(replaces OREAS 200)
(replaces OREAS 203)
(replaces OREAS 205)
(replaces OREAS 16a)
(replaces OREAS 206)
(replaces OREAS 208)
Two pegmatite Li-Nb-Sn ore CRMs (early 2017)
Analytical certification program to include: 1. Full ICP elemental suite by 4-acid digest with ICP-OES & MS finish and 2. Full ICP elemental suite by peroxide fusion with ICP-OES & MS finish.
The lithium pegmatite ore is sourced from the Greenbushes Mine in WA, Australia.