# Isotopic Analysis At Geysers Area (Lambert & Epstein, 1992)

From Open Energy Information

## Exploration Activity: Isotopic Analysis At Geysers Area (Lambert & Epstein, 1992)

Measurements of 180/160, 13C/12C and D/H ratio variations were made by the usual methods (McCrea, 1950; Taylor and Epstein, 1962; Epstein and Taylor, 1970) using mass spectrometers of the type described by Nier (1947) with modifications by McKinney et al. (1950). Results are reported in 8-notation with respect to the SMOW (Craig, 1961 ) and PDB (Urey et al., 1951 ) standards. Analytical precisions for multiple analyses of any single sample were _+ 0.2%0 for oxygen and carbon and _ 1%o for hydrogen. Inhomogeneities of cuttings fractions gave rise to variations within single cuttings fractions as large as _ 0.5%0 for oxygen and carbon and + 5%0 for hydrogen.

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