Gamma-ray analysis of the sediments overlying the Helez and Kochav oil fields, Israel

N. E. Yanaki, D. Ashery, J. Kronfeld*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


A very sensitive, low-background gamma-ray spectrometer was used to show that a negative total gamma-ray intensity anomaly over the Helez and Kochav oil fields is due to the depletion in all three radionuclides (40K, 232Th, and 238U). The location of the radiometric anomalies at the surface above petroleum reservoirs at depth, suggests a genetic connection. It is proposed that the soil radioactivity is not the result of vertical radionuclide transport from the reservoir, rather that migrating hydrocarbons interact and degrade clays and other soil minerals which then release these large cations that substitute for each other diadochously.

Original languageEnglish
Pages (from-to)249-254
Number of pages6
JournalJournal of Geochemical Exploration
Issue number1-2
StatePublished - Jul 1999
EventProceedings of the 18th International Geochemical Exploration Symposium 'Geochemical Exploration 1997' - Jerusalem, Isr
Duration: 25 May 199729 May 1997


  • Gamma-ray prospecting
  • Israel
  • Petroleum


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