OREAS 45c

Multi-element soil standard OREAS 45c is one of a pigeon pair prepared from a 50:50 blend of barren soil and soil characterised by anomalous levels of precious and base metals. The anomalous sample was obtained from soil developed over a Ni-Cu-PGE mineralised contact between gabbro and pyroxenite the Southern Murchison region of Western Australia while the barren sample was taken from an in situ layer of mature soil developed over early Tertiary olivine basalt in outer eastern Melbourne, Victoria, Australia.

SEE CERTIFICATE OF ANALYSIS FOR FULL LIST OF CERTIFIED ELEMENTS (includes Au, Pt and Pd by fire assay ICPMS; Ag, As, Bi, Cd, Co, Cr, Cu, Na, Ni, P, Pb, Sb, Zn by four-acid digest and ICPOES or ICPMS; Ag, As, Au, Bi, Cd, Co, Cr, Cu, Ni, Pb, Pd, Pt, Sb, Zn by aqua regia and ICPOES or ICPMS; major elements by fusion XRF or fusion ICPOES; C and S by Leco furnace; lithophile trace elements by fusion ICPMS. Lab G determined As, Au, Ce, La, Lu, Na, Sb, Sm and Yb in twenty replicates via instrumental neutron activation analysis (INAA) using reduced analytical subsample weights of 4g. 

Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Au, Gold (ppb) 45 10 35 54 Pb Fire Assay
Pt, Platinum (ppb) 65 4 59 70 Pb Fire Assay
Pd, Palladium (ppb) 47 1 45 48 Pb Fire Assay
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