Abstract
A spectrochemical method for the determination down to 10 −4% Zn in numerous rocks and minerals has been developed. By means of fractionated distillation the separation of Zn occurring in silicates and spinells from Zn in ZnS-bearing rocks has been made possible. The result of 130 analyses confirms the figures given by Clarke-Washington (1924) (0.004%Zn) and the unpublished results by V.M. Goldschmidt (1938) (≤ 0,004% Zn) for the abundance of Zn in the lithosphere.
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