Further Investigations on ¹⁴C Dating of Calcareous Tufa

Abstract

ABSTRACT. Systematic studies on 14C dating of tufa profiles in southern Poland have resulted in developing a simple phenomenological model which enables us to estimate the reservoir correction factor of 14C dates of individual carbonate samples. We made further studies to test model assumptions and to verify relationships between the value of reservoir correction factor TR and l3C content of tufa carbonate. Two new study sites, Rudawa and Szklarka, are close to previously studied sites. Four tufa samples with associated organic fraction from ca 2000m asl in South America (Peruvian Andes) were measured to test the possible application of the developed model to tufas in different geochemical and climatic environments. Finally, a series of calcareous tufa samples from the Villers-devant-Orval profile (Belgium) were dated, although no direct comparison with organic matter dates is available for this profile.

The late-Holocene tufa decline in Europe: Myth or reality?

“…The stratigraphic position of dated samples within the whole tufa deposit should be carefully considered which in turn also prevent to include dates which are not consistent with other chronological information (due to e.g. reworked material, diagenesis, dead carbon ageing; (Pazdur and Pazdur, 1990;Pazdur et al, 1988).…”

Interglacial Growth of Tufa in Croatia

“…Therefore, the growth records of tufa and speleothems may contain valuable information on the regional palaeoclimate (Geyh, 1970;Franke and Geyh, 1970;Hennig et al, 1983;Gascoyne et al, 1983;Schwarcz and Gascoyne, 1984;Baker et al, 1993;Pazdur et al, 1995). Analysis by both 14 C and uranium-series disequilibrium ( 230 Th/ 234 U; in the following text U-Th) methods has yielded dates of tufa and speleothem samples (Geyh, 1970;Franke and Geyh, 1970;Srdoč et al, 1983Srdoč et al, , 1994Hennig et al, 1983;Schwarcz and Gascoyne, 1984;Geyh and Hennig, 1986;Ford and Gospodarič, 1989;Pentecost et al, 1990;Pazdur et al, 1988Pazdur et al, , 1995Pazdur and Pazdur, 1990;Zupan, 1991;Dorale et al, 1992;Falguères et al, 1992;Baker et al, 1993). Geyh (1970) and Franke and Geyh (1970) gave the first evidence based on 69 14 C dates that speleothem growth was restricted to interglacial and interstadial periods in central Europe.…”