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Stable isotope analyses of the peralkaline volcanics Gregory Rift Valley, KenyaDelta 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.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Black, S.
(Lancaster Univ. United Kingdom)
Macdonald, R.
(Lancaster Univ. United Kingdom)
Fallick, A. E.
(Scottish Research Reactor Centre East Kilbride., United States)
Kelly, M.
(Lancaster Univ. United Kingdom)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F
Subject Category
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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