OREAS 203 was prepared from a blend of gold-bearing Magdala ore from the
Stawell Gold Mine, west-central Victoria, Australia and barren tholeiitic basalt
from Epping, Victoria, Australia. The Magdala lode is intimately associated with
an intensely deformed package of volcanogenic sedimentary rocks. The ore samples
were taken from basalt contact lodes and are strongly chlorite-altered (+/-
silica, stilpnomelane) carbonaceous mudstones located directly on the western
margin of the Magdala basalt dome. Mineralisation in the ore consists of a
quartz-sericite-carbonate schist assemblage containing the sulphides
arsenopyrite, pyrrhotite and pyrite. OREAS 203 is one of a suite of eight CRMs
ranging in gold content from 0.514 to 9.24ppm.
|Analyte||Certified Value||1SD||95% Confidence Low||95% Confidence High||Method|
|Au, Gold (ppm)||0.871||0.030||0.859||0.884||Pb Fire Assay|
|Au, Gold (ppm)||0.825||0.062||0.793||0.857||Aqua Regia Digestion|
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