14C Age Corrections in Antarctic Lake Sediments Inferred from Geochemistry
dc.contributor.author | Zale, Rolf | |
dc.date.accessioned | 2021-02-11T20:32:29Z | |
dc.date.available | 2021-02-11T20:32:29Z | |
dc.date.issued | 1994-01-01 | |
dc.identifier.citation | Zale, R. (1994). 14C age corrections in Antarctic lake sediments inferred from geochemistry. Radiocarbon, 36(2), 173-185. | |
dc.identifier.issn | 0033-8222 | |
dc.identifier.doi | 10.1017/S0033822200040480 | |
dc.identifier.uri | http://hdl.handle.net/10150/653190 | |
dc.description.abstract | Sediment 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.iso | en | |
dc.publisher | Department of Geosciences, The University of Arizona | |
dc.relation.url | http://radiocarbon.webhost.uits.arizona.edu/ | |
dc.rights | Copyright © by the Arizona Board of Regents on behalf of the University of Arizona. All rights reserved. | |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.subject | lacustrine sedimentation | |
dc.subject | guano | |
dc.subject | Lake Boeckella | |
dc.subject | Pygoscelis adeliae | |
dc.subject | Sphenisciformes | |
dc.subject | Antarctic Peninsula | |
dc.subject | trace elements | |
dc.subject | corrections | |
dc.subject | Antarctica | |
dc.subject | sedimentation | |
dc.subject | mathematical methods | |
dc.subject | concentration | |
dc.subject | models | |
dc.subject | glacial geology | |
dc.subject | deglaciation | |
dc.subject | Chordata | |
dc.subject | Tetrapoda | |
dc.subject | Vertebrata | |
dc.subject | Aves | |
dc.subject | glaciation | |
dc.subject | organic residues | |
dc.subject | sediments | |
dc.subject | C 14 | |
dc.subject | carbon | |
dc.subject | dates | |
dc.subject | isotopes | |
dc.subject | radioactive isotopes | |
dc.subject | absolute age | |
dc.title | 14C Age Corrections in Antarctic Lake Sediments Inferred from Geochemistry | |
dc.type | Article | |
dc.type | text | |
dc.identifier.journal | Radiocarbon | |
dc.description.note | This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries. | |
dc.description.collectioninformation | The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. | |
dc.eprint.version | Final published version | |
dc.description.admin-note | Migrated from OJS platform February 2021 | |
dc.source.volume | 36 | |
dc.source.issue | 2 | |
dc.source.beginpage | 173 | |
dc.source.endpage | 185 | |
refterms.dateFOA | 2021-02-11T20:32:29Z |