Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 2Pd was prepared from a blend of oxidised ore and barren material taken
from the flanks of a mineralised shear zone within Ordovician flysch sediments
in the Blackwood area of central Victoria. The sedimentary succession hosting
the shear zone consists predominantly of medium-grained greywackes together with
subordinate interbedded siltstone and slate. Hydrothermal alteration in the
vicinity of the mineralisation is indicated by the development of phyllite. The
shear zone, in which gold grades attain a maximum, is manifested by foliated
sericitic and chloritic fault gouge and goethitic quartz veins.
Although no
ore mineragraphy or scanning electron microscopy has been undertaken to
determine the nature of occurrence of the gold, the very homogeneous
distribution on a mesoscopic scale and uniform concentration gradient away from
the ore zone suggests the gold is extremely fine-grained and evenly
disseminated. Limited percussion drilling indicates that sulphides are rare to
absent at depth in the shear zone.
Analyte | Certified Value | 1SD | 95% Confidence Limits Low | 95% Confidence Limits High | Method |
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Au, Gold (ppm) | 0.885 | 0.030 | 0.871 | 0.898 | Pb Fire Assay |
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