Using the 14C bomb pulse to date young speleothems

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dc.contributor.authorHodge, Een_AU
dc.contributor.authorMcDonald, Jen_AU
dc.contributor.authorFischer, MJen_AU
dc.contributor.authorRedwood, Den_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorLevchenko, VAen_AU
dc.contributor.authorDrysdale, RNen_AU
dc.contributor.authorWaring, CLen_AU
dc.contributor.authorFink, Den_AU
dc.date.accessioned2013-04-09T01:04:11Zen_AU
dc.date.available2013-04-09T01:04:11Zen_AU
dc.date.issued2011-04-01en_AU
dc.date.statistics2013-04-09en_AU
dc.description.abstractMany factors may influence the radiocarbon age results of lacustrine sediments, among which the hardwater effect is particularly important. Daihai Lake is a closed lake located in the semi-arid region of Inner Mongolia, China. High concentrations of (HCO3)- and (CO3)2- and high pH values in the lake water imply that there is a hardwater effect when using bulk lacustrine sediment samples for 14C dating. To correct the apparent 14C age, we present a pilot study based on a series of 14C ages of lake surface sediment, lake water, submerged aquatic plant (Myriophyllum), fish bone (Cyprinus carpio), and surface soil samples from and around Daihai Lake. Assuming that the relationship between the 14C/12C ratio of DIC and of atmospheric CO2 was constant (at 0.816), the hardwater effect ages calculated for the past 8000 yr would have varied from 949 to 1788 yr. Together with the reservoir effect and soil organic matter input, the hardwater effect is a major factor causing changes in apparent age when using bulk organic matter for 14C dating. © 2011, University of Arizona.en_AU
dc.identifier.citationHodge, E., McDonald, J., Fisher, M., Redwood, D., Hua, Q., Levchenko, V., Drysdale, R., Waring, C., & Fink, D. (2011). Using the 14C bomb pulse to date young speleothems. Radiocarbon, 52(2), 345-357. doi:10.1017/S0033822200056605en_AU
dc.identifier.govdoc3741en_AU
dc.identifier.issn0033-8222en_AU
dc.identifier.issue2en_AU
dc.identifier.journaltitleRadiocarbonen_AU
dc.identifier.pagination345-357en_AU
dc.identifier.urihttps://doi.org/10.1017/S0033822200056605en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4534en_AU
dc.identifier.volume52en_AU
dc.language.isoenen_AU
dc.publisherUniversity of Arizonaen_AU
dc.subjectCarbon 14en_AU
dc.subjectIsotope datingen_AU
dc.subjectRadiochemical analysisen_AU
dc.subjectAquifersen_AU
dc.subjectSoilsen_AU
dc.titleUsing the 14C bomb pulse to date young speleothemsen_AU
dc.typeJournal Articleen_AU
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