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The relevance of parametric U-uptake models in ESR age calculations

Grun, Rainer

Description

In the ESR dating three basic parametric U-uptake models have been applied for dating teeth: early U-uptake (EU: closed system), linear U-uptake (LU) and recent U-uptake (RU, it is assumed that the dose rate contribution of U in the dental tissues is zero). In many ESR dating publications it is still assumed that samples comply with one or the other parametric U-uptake model calculation or that their correct age lies somewhere between EU and LU. Observations of the spatial distribution of...[Show more]

dc.contributor.authorGrun, Rainer
dc.date.accessioned2015-12-10T22:30:36Z
dc.identifier.issn1350-4487
dc.identifier.urihttp://hdl.handle.net/1885/55165
dc.description.abstractIn the ESR dating three basic parametric U-uptake models have been applied for dating teeth: early U-uptake (EU: closed system), linear U-uptake (LU) and recent U-uptake (RU, it is assumed that the dose rate contribution of U in the dental tissues is zero). In many ESR dating publications it is still assumed that samples comply with one or the other parametric U-uptake model calculation or that their correct age lies somewhere between EU and LU. Observations of the spatial distribution of uranium in dental tissues show that it is difficult to predict any relationships between the relative uptake in the dental tissues. Combined U-series/ESR age estimates can give insights into the actual U-uptake. An evaluation of published data shows that for cave sites, a significant number of results fall outside the EU and LU bracket, while for open air sites, the majority of data are outside this bracket, particularly showing greatly delayed U-uptake. This may be due to changes in the hydrological system, leading to erosion which exposes the open air site. U-leaching has also been observed on samples from open air sites, in which case any reasonable age calculation is impossible.
dc.publisherPergamon-Elsevier Ltd
dc.sourceRadiation Measurements
dc.subjectKeywords: Closed systems; Dental tissues; Dose rate; ESR dating; Hydrological system; Model calculations; Spatial distribution; U-series dating; U-uptake; Histology; Leaching; Size distribution; Transuranium elements; Uranium; Electroslag remelting ESR dating; U-series dating; U-uptake
dc.titleThe relevance of parametric U-uptake models in ESR age calculations
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume44
dc.date.issued2009
local.identifier.absfor040203 - Isotope Geochemistry
local.identifier.absfor040303 - Geochronology
local.identifier.ariespublicationu9503261xPUB320
local.type.statusPublished Version
local.contributor.affiliationGrun, Rainer, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage472
local.bibliographicCitation.lastpage476
local.identifier.doi10.1016/j.radmeas.2009.02.011
dc.date.updated2016-02-24T12:01:51Z
local.identifier.scopusID2-s2.0-70249093227
local.identifier.thomsonID000271334400012
CollectionsANU Research Publications

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