Using the N/C ratio to correct bulk radiocarbon ages from lake sediments : insights from Chilean Patagonia
Date
2012-06-12Metadata
Show full item recordCitable URI
https://hdl.handle.net/1912/5621As published
https://doi.org/10.1016/j.quageo.2012.06.003Keyword
Old carbon; Age model; Soil organic matter; ChronologyAbstract
The offset between AMS radiocarbon ages obtained on bulk lake sediments and the true age of deposition was evaluated at four sites in Northern Chilean Patagonia. Our results show that the bulk radiocarbon ages are systematically older by 300 to 1100 years. In this region free of carbonate and carbonaceous rocks, we argue that this difference results from variable inputs of terrestrial organic carbon from the Holocene soils that cover the lake watersheds. For the four studied lakes, the age offset is clearly related to the fraction of terrestrial carbon preserved in the lake sediments, which was estimated using the N/C ratio of the bulk organic matter. We propose that N/C measurements can be used to significantly improve chronologies based on radiocarbon dating of bulk lake sediments.
Description
Author Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Quaternary Geochronology 12 (2012): 23-29, doi:10.1016/j.quageo.2012.06.003.
Collections
Suggested Citation
Preprint: Bertrand, Sebastien, Araneda, Alberto, Vargas, Patricia, Jana, Patricia, Fagel, Nathalie, Urrutia, Roberto, "Using the N/C ratio to correct bulk radiocarbon ages from lake sediments : insights from Chilean Patagonia", 2012-06-12, https://doi.org/10.1016/j.quageo.2012.06.003, https://hdl.handle.net/1912/5621Related items
Showing items related by title, author, creator and subject.
-
The GEOTRACES Intermediate Data Product 2017
(Elsevier, 2018-06-01)The GEOTRACES Intermediate Data Product 2017 (IDP2017) is the second publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2016. The ... -
Changes in sub-fossil chironomid assemblages in two Northern Patagonian lake systems associated with the occurrence of historical fires
(2012-09-06)Patagonia is commonly seen as an exceptionally pristine area because of its wildlife and practically unpolluted waters. However, during the twentieth century the burning of natural forests was one of the most important ... -
Bacterial biogeography across the Amazon river-ocean continuum
(Frontiers Media, 2017-05-23)Spatial and temporal patterns in microbial biodiversity across the Amazon river-ocean continuum were investigated along ∼675 km of the lower Amazon River mainstem, in the Tapajós River tributary, and in the plume and coastal ...
