The geochemistry and origin of amphibolites from Bamble, South Norway. I. The determination of zinc in amphibolites by atomic absorption spectroscopy.

A simple, but rapid and accurate, atomic absorption spectroscopic technique for determining the trace zinc contents of basic silicates is described. The potentially interfering effects of certain co-existing ions necessitates the use of separate working curves for the various types of silicate material. The method is applicable to all basic rocks and certain mineral groups including amphiboles, micas and garnets. The zinc contents of nine amphibolite samples from the Precambrian Bamble-area, South Norway, are given together with repeated determinations of the standard diabase W 1.