Skip to Main content Skip to Navigation
Journal articles

14C in Urban Secondary Carbonate Deposits: a New Tool for Environmental Study

Abstract : Secondary carbonate deposits (similar to speleothems) in urban undergrounds, have been recently highlighted as powerful archives for reconstruction of the historical anthropogenic imprint on the environment. The precise chronology of these secondary carbonate deposits is a key issue for the accurate time reconstruction of environmental conditions. We present three 14C data sets for urban speleothem-like deposits that developed in contrasted man made environments. The first one was sampled in an underground technical gallery of the Palace of Versailles (France), and the other two in a manhole (Saint-Martin spring) of a historical underground aqueduct in Paris (France). The comparison of these records with the bomb peak and relative chronology (laminae counting) allowed us to identify: i) fast carbon transfer from the atmosphere to the urban underground; ii) a high proportion of dead carbon and a high damping effect in relation to possible old carbon stored within urban soils and/or the influence of local fossil carbon burning. This study also shows that the lamination of these deposits is biannual in these highly urbanized sites.
Complete list of metadatas

Cited literature [38 references]  Display  Hide  Download

https://hal-cnrs.archives-ouvertes.fr/hal-02428397
Contributor : Edwige Pons-Branchu <>
Submitted on : Sunday, January 5, 2020 - 9:35:16 PM
Last modification on : Wednesday, September 16, 2020 - 5:02:50 PM
Long-term archiving on: : Monday, April 6, 2020 - 4:30:44 PM

File

Pons-Branchu-2018-radiocarbon....
Files produced by the author(s)

Identifiers

Citation

E. Pons-Branchu, L. Bergonzini, N. Tisnerat-Laborde, P. Branchu, E. Dumont, et al.. 14C in Urban Secondary Carbonate Deposits: a New Tool for Environmental Study. Radiocarbon, University of Arizona, 2018, 2nd Radiocarbon in the Environment Conference Debrecen, Hungary, July 3–7, 2017, 60 (4), pp.1269-1281. ⟨10.1017/RDC.2018.25⟩. ⟨hal-02428397⟩

Share

Metrics

Record views

139

Files downloads

250