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18O 16O ratios in cherts associated with the saline lake deposits of East Africa

Earth and Planetary Science Letters

By:
and

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Abstract

The cherts formed from sodium silicate precursors in East African saline, alkaline lakes have ??18O values ranging from 31.1 to 44.1. The ??18O values correlate in general with lake salinities as inferred from geologic evidence, indicating that most chert was formed from its precursor in contact with lake water trapped at the time of deposition. A few of the analyzed cherts probably formed in contact with dilute meteoric water. From the widely varying ??18O values we conclude that precursors were transformed to chert in fluids of widely varying salinity and aNa+/aH+ ratio. ?? 1973.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
18O 16O ratios in cherts associated with the saline lake deposits of East Africa
Series title:
Earth and Planetary Science Letters
Volume
19
Issue:
2
Year Published:
1973
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Earth and Planetary Science Letters
First page:
257
Last page:
266
Number of Pages:
10