UM-2 and UM-4 are discontinued and no longer available for purchase.
Certified Reference Material: Sulphide-Bearing Ultramafic Rocks
Printable version of the certificate (PDF, 22.18 kb)
UM-2 and UM-4 are from the Werner Lake - Gordon Lake district of northwestern Ontario. These rock samples are intended as reference materials for the determination of ascorbic acid/hydrogen peroxide-soluble copper, nickel, and cobalt in ultramafic rocks to evaluate their ore potential.
|Total Fe as FeO||12.95||12.8|
Details of the mineralogy of UM-2 and UM-4 are given in Geological Survey of Canada Paper 71-35, "Three geochemical standards of sulphide-bearing ultramafic rock: UM-1, UM-2, and UM-4". The following table by E.M. Cameron provides values for the major and minor elements; they are intended for information purposes only. Note: the supply of UM-1 has been exhausted.
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