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dc.contributor.authorZale, Rolf
dc.date.accessioned2021-02-11T20:32:29Z
dc.date.available2021-02-11T20:32:29Z
dc.date.issued1994-01-01
dc.identifier.citationZale, R. (1994). 14C age corrections in Antarctic lake sediments inferred from geochemistry. Radiocarbon, 36(2), 173-185.
dc.identifier.issn0033-8222
dc.identifier.doi10.1017/S0033822200040480
dc.identifier.urihttp://hdl.handle.net/10150/653190
dc.description.abstractSediment from Lake Boeckella, Antarctic Peninsula, is richer in Ca, Cd, Cu, P, Sr and Zn than that of six other lakes in the area. The elements originate from Adélie penguin (Pygoscelis adeliae) guano on the lake shores. Changing Cu and P concentrations in the lake sediment are used as a proxy for penguin influence on the lake sediment from ca. 5850 BP to Present. A 14C dating model suggests that the 14C correction factor in the lake sediments depends on the penguin proxy, the apparent age of the penguin guano and the amount of particulate carbon originating from the carbon-bearing shales in the watershed. Glacial meltwater and dissolved carbonates do not contain enough "old" carbon to contribute significantly to the correction factor. Ages corrected with the 14C dating model agree with the depth vs. age curve based on independently 14C-dated tephra horizons. The reservoir effect has been constant since at least 5800 BP, implying long-term stability of the currents and water masses in the area. The existing chronology for Lake Boeckella has been recalculated. The period of glacial advance, previously thought to have culminated at 5000 BP, is now thought to have culminated at 4700 BP; deglaciatlon of the area is thought to have occurred at 6300 BP instead of 8680 BP.
dc.language.isoen
dc.publisherDepartment of Geosciences, The University of Arizona
dc.relation.urlhttp://radiocarbon.webhost.uits.arizona.edu/
dc.rightsCopyright © by the Arizona Board of Regents on behalf of the University of Arizona. All rights reserved.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectlacustrine sedimentation
dc.subjectguano
dc.subjectLake Boeckella
dc.subjectPygoscelis adeliae
dc.subjectSphenisciformes
dc.subjectAntarctic Peninsula
dc.subjecttrace elements
dc.subjectcorrections
dc.subjectAntarctica
dc.subjectsedimentation
dc.subjectmathematical methods
dc.subjectconcentration
dc.subjectmodels
dc.subjectglacial geology
dc.subjectdeglaciation
dc.subjectChordata
dc.subjectTetrapoda
dc.subjectVertebrata
dc.subjectAves
dc.subjectglaciation
dc.subjectorganic residues
dc.subjectsediments
dc.subjectC 14
dc.subjectcarbon
dc.subjectdates
dc.subjectisotopes
dc.subjectradioactive isotopes
dc.subjectabsolute age
dc.title14C Age Corrections in Antarctic Lake Sediments Inferred from Geochemistry
dc.typeArticle
dc.typetext
dc.identifier.journalRadiocarbon
dc.description.noteThis material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.
dc.description.collectioninformationThe Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform February 2021
dc.source.volume36
dc.source.issue2
dc.source.beginpage173
dc.source.endpage185
refterms.dateFOA2021-02-11T20:32:29Z


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