Scientific article
Open access

L'isotope ¹³⁷Cs utilisé comme dateur de la pollution des sédiments lacustres

Published inArchives des sciences, vol. 32, no. 1, p. 25-41
Publication date1979

A method for dating pollution by means of ¹³⁷Cs fallout from nuclear explosions into the sediment has been tested in 3 lakes of western Switzerland. The method involves determining the sedimentation rate in grams of dry sediment per surface unit per year and was applied to 6 large diameter cores. Two of them were dated precisely, one with a lesser precision and 3 with minimal or maximal dates because of very high or very low sedimentation rates. Pollution was estimated by the concentrations in the sediments of 2 to 7 trace metals and of 1 or 2 nutrients. The results indicate that sediment enrichment in heavy metals began before the 1930's, slightly increased until 1972 and has been decreasing since then. Nutrient enrichement of the sediment started around 1900 and kept growing steadily until the present time.

Citation (ISO format)
FAVARGER, Pierre-Yves, VERNET, Jean-Pierre. L’isotope ¹³⁷Cs utilisé comme dateur de la pollution des sédiments lacustres. In: Archives des sciences, 1979, vol. 32, n° 1, p. 25–41. doi: 10.5169/seals-739894
Main files (1)
Article (Published version)
ISSN of the journal0003-9705

Technical informations

Creation03/09/2022 12:19:00 PM
First validation03/09/2022 12:19:00 PM
Update time03/16/2023 2:51:00 AM
Status update03/16/2023 2:50:59 AM
Last indexation01/17/2024 4:30:44 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack