Interstitial water and sediment chemistries of Lake Aiguebelette (Savoy, France)

Jean François Gaillard*, Gérard Sarazin, Hélène Pauwels, Laurence Philippe, Dominique Lavergne, Gerard Blake

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Interstitial waters were collected from Lake Aiguebelette sediment, Savoy, France, using an in situ sampler. Major ions, nutrients and trace metals Fe and Mn were measured. Early diagenesis in these sediments leads to the release of all the investigated elements. ΣPO4, NH+4 and H4SiO4 demonstrate significant concentration gradients reflecting organic matter decomposition. Thermodynamic calculations suggest that calcite, which precipitates from the overlying waters, dissolves in the pore fluids. A simplified model is presented to account for the increase of Ca2+, Alk and H+ concentrations with depth. Mineralogical investigations using SEM, TEM, microprobe analysis and step dissolution of the sediment complete and corroborate the conclusions based on the study of interstitial waters (i.e. calcium carbonate and silica dissolution).

Original languageEnglish (US)
Pages (from-to)73-84
Number of pages12
JournalChemical Geology
Issue number1-2
StatePublished - Jul 10 1987

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology


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