Stable isotope analyses of the peralkaline volcanics Gregory Rift Valley, Kenya

Details Stable isotope analyses of the peralkaline volcanics Gregory Rift Valley, Kenya Stable isotope analyses of the peralkaline volcanics Gregory Rift Valley, Kenya

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..119b&link_type=abstract

In Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F p 119-120 (SEE N94-12015 01-91)

Physics

African Rift System, Basalt, Isotopes, Kenya, Rhyolite, Trachyte, Volcanology, Mineralogy, Oxygen 18

Scientific paper

Delta O-18 analyses of the Naivasha rhyolites, basalts, Menengai trachytes and the Yatta phonolite are presented together with D/H analyses of the Naivasha rhyolites. Delta O-18 results vary from 5.7 to 8.9 per mill which is within the reported range of delta O-18 analyses for continental volcanics. Closure temperatures calulated from the basalts and rhyolites show equilibration to be at magmatic temperatures. D/H values range from -40 to -148 per mill indicating that the rhyolites have undergone large scale degasssing.

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