Quantifying carbonate concentration alongside the measurement of isotope ratios in sediment samples via continuous flow IRMS analysis

Rationale: The measurement of δ18O and δ13C in carbonate samples has become standard practice for the reconstruction of past climate and oceanographic conditions. Besides the measurement of biogenic carbonates, e.g., foraminifera, brachiopods or corals, bulk sediment containing variable quantities of carbonate is often analysed to understand the evolution of palaeoenvironmental conditions through time. In addition to the isotopic ratios of carbonate in bulk sediments, also the amount of carbonate present in a sample may carry important information about the palaeoenvironment, e.g., as an input into cyclostratigraphic models allowing for precise quantification of age intervals represented by a sedimentary succession.