The pyrrhotites contain significant Cu and minor amounts of Ni, Mn, and Ti in all eight samples, and V, Cr, and Co in half or less of the samples; Zn, Ag, and Pb were not detected. Magnetite samples showed abundant V, Cr, Ni, Mn, and Ti and traces of Co and Cu. All samples are consistently high in Ca and Al. Cu is considered to represent a substitution for ferrous iron at elevated temperature. Ni and Co are low because they form independent minerals.

First Page Preview

First page PDF preview
You do not currently have access to this article.