What is it about?
In the publication we calculate relative palaeointensity (RPI) curves that correlated with global models enabling dating of the cores. The 250 cm of sediment recovered spans the last 10 200 yr BP. Some samples with high organic matter content were dated by accelerator mass spectrometry 14C. By comparison with the age defined by the RPI curves, a reservoir effect of c. 5200 years is suggested for this region of Vega Island.
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Why is it important?
Concerning the difficulties of radiocarbon dating in Antarctica, strict definitions for obtaining a good chronology of sediments using different strategies in this region are much needed. A high quality RPI curve was achieved for Lake Esmeralda (Vega Island, Antarctica), this important dating tool allowed us to date 250 cm of Antarctic lake sediments.
Perspectives
Although other radiocarbon dates are needed to refine the chronological scale, the RPI Esmeralda itself constitutes an alternative and useful dating tool for Antarctic lacustrine sediment.
Dr María A Irurzun
CIFICEN
Read the Original
This page is a summary of: Relative palaeointensity and reservoir effect on Lake Esmeralda, Antarctica, Antarctic Science, March 2017, Cambridge University Press,
DOI: 10.1017/s0954102017000050.
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