Two posters presented at the Workshop on the use of stable isotopes techniques for assessing biogeochemical cycling of contaminants and nutrients
J1-9179 - Non-traditional isotopes as identifiers of authigenic carbonates
Non-traditional isotopes as identifiers of authigenic carbonates, 1. 7. 2018 - 30. 6. 2021, Sonja Lojen
Authigenic carbonate has been invoked as the third major global sink of CO2, and quantitative estimates of its production have so far been made only for marine carbonates. The first estimates in terrestrial environment were made based on Sr isotopes (δ88/86Sr) in river water and the results indicate that this sink is most probably largely underestimated. Consequently, the magnitude of terrestrial carbon fluxes and terrestrial carbon mass balance should to be reconsidered.
This project aims to validate advanced isotopic tools for identification and quantification of authigenic carbonate in terrestrial sediments and aquifers in areas dominated by carbonate lithology. As identifiers of authigenic carbonate, ratios of so-called non-traditional isotopes of Mg, Sr, U and Mo will be explored (the term “non-traditional isotopes” applies to those which are analysed using advanced plasma source mass spectrometry with multiple collectors – MC-ICP-MS). The goal of the project is to develop an analytical toolkit for differentiation of authigenic carbonate phases from detrital carbonate in complex sedimentary settings in areas dominated by carbonaceous lithology.
Slovenian National Building and Civil Engineering Institute: Vilma Ducman (group leader),