Concentrations of copper (cuprite, native copper), silver and mercury (schachnerite), and vanadium (roscoelite) occur in greyish, dark-cored reduction spheres in Upper Mississippian redbeds of the Hopewell Group in southeastern New Brunswick. The mineralized reduction spheres range from approximately 1 to 6 cm in diameter. Analytical work indicates that organic matter is not present in either the mineralized cores or their enclosing spheres.Tentative results from this investigation support the conclusion that some if not all of the metallic minerals present in the reduction spheres were introduced in the environment during or shortly after deposition of the strata. This type of mineral association in redbeds has apparently not previously been described in the literature.

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