Abstract

AbstractA new method for measuring the relative abundances of oxygen isotopes in silicate rocks is described. The silicate is reacted with carbon at about 2000° in a high vacuum resistance furnace and the CO thus produced is collected and fed into a double collector mass spectrometer. By taking the necessary precautionary measures it is possible to determin the 18O/16O ratios with a relative accuracy of about 0,6°/00.

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