Differences in the 14C age, δ13C and δ18O of Holocene tufa and speleothem in the Dinaric Karst

Towards a Deeper Understanding of How Carbonate Isotopes (14C, 13C, 18O) Reflect Environmental Changes: A Study with Recent 210Pb-Dated Sediments of the Plitvice Lakes, Croatia

“…We have an extensive record of δ 13 C of DIC in waters of the Plitvice Lakes system, from the karst springs over the lakes downstream to the Korana River below the lakes for 1984-1990(SrdoË et al 1986bHorvatinËiÊ et al 2003). In this period, DIC samples were taken at sampling points along the water course and in different seasons.…”

“…Moreover, 14 C distribution in the sediment can be used to determine sedimentation rate (SrdoË et al 1986a;Mayr et al 2005). Stable isotope ratios of 13 C/ 12 C and 18 O/ 16 O give additional information about past environmental conditions; they can reflect temperature variations, lake evaporation, bioactivity, and productivity, and indicate the origin of carbon in sediment and/or mechanisms of calcite precipitation (Chafetz and Lawrence 1994;Andrews et al 1997;HorvatinËiÊ et al 2003;Andrews and Brasier 2005). Isotopic and geochemical analyses of organic and carbonate fractions of recent sediments (such as the changes in concentration of organic matter in sediments and of its C/N ratio) are also applied in studying processes related to eutrophication that occur during calcite precipitation, e.g.…”

“…Previous studies of the Plitvice Lakes focused on the processes of tufa/lake sediment precipitation using chemical and isotopic methods (SrdoË et al 1985;HorvatinËiÊ et al 1989HorvatinËiÊ et al , 2003. Determination of the initial 14 C activity of DIC in water and tufa/lake sediments (Krajcar BroniÊ et al 1986 as well as carbon isotope exchange processes in downstream flow (SrdoË et al 1986b;HorvatinËiÊ et al 2003) were completed in connection with the 14 C dating of carbonate deposits.…”

Paleoenvironmental Evolution of Continental Carbonates in West-Central Brazil

“…In the Serra das Araras, the influence of the structures on the genesis of carbonates is demonstrated by their geometry and position, characterized by elongated bodies of Cpc, Cbw, Lt and Mt facies parallel to the base of a fault Andrews et al 1997, Arenas et al 2004, Boggiani et al 1999, Buccino et al 1978, Chafetz and Lawrence 1994, Fritz 1965, Horvatinčić et al 2003, Sinha et al 2006.…”

Simulation of 3D karst conduits with an object-distance based method integrating geological knowledge

“…These karst features can be dramatic as the surface land usually stays intact until there is insufficient support: the soil suddenly collapses, swallowing everything above [e.g., Brinkmann et al, 2008, Frumkin et al, 2009, Parise et al, 2009. Recent works have shown that karsts may also be a major source of paleoclimate records [e.g., Mongelli, 2002, Horvatinčić et al, 2003, Onac and Constantin, 2008, Kuo et al, 2011. Nowadays human activities are a major threat for karstic environments [e.g., De Waele et al, 2011], and furthermore climate changes may have a considerable impact on them in the future [e.g., Viles, 2003, Hartmann et al, 2012.…”