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In situ U-series dating by laser ablation multi-collector ICPMS: new prospects for Quaternary geochronology.

In situ U-series dating by laser ablation multi-collector ICPMS: new prospects for Quaternary geochronology.
In situ U-series dating by laser ablation multi-collector ICPMS: new prospects for Quaternary geochronology.
The capabilities and potential applications of in situ dating of Quaternary materials using laser ablation-MC-ICPMS are explored. 234U/238U and 230Th/234U can be measured with precision sufficient for dating at a spatial resolution of 100 ?m or better in samples that contain as a little as 1 ppm uranium. Moreover, U and Th concentrations and U-series isotope ratios can be continuously profiled to determine changes in age that occur with sample growth (e.g. in speleothems). These capabilities additionally permit the dating of bones, teeth and possibly molluscs, which are subject to post-mortem open-system behaviour of U-series isotopes, and can be employed to elucidate processes of U-series migration during weathering and diagenesis. A drawback of laser ablation-MC-ICPMS is that it cannot in general provide U-series age estimates with the high precision and accuracy of conventional TIMS or solution MC-ICPMS methods. However, sample preparation is straightforward, the amount of sample consumed negligible, and it can be used to rapidly characterise or screen and select samples from which more precise and accurate dates can be obtained using conventional methods. Given further instrumental developments and the establishment of suitable matrix-matched standards for carbonates and other materials, we foresee that laser ablation-MC-ICPMS will play an increasingly important role in Quaternary dating research.
0277-3791
2523-2538
Eggins, S.M.
23c7ce12-1e15-4681-b235-658676c6b733
Grün, R.
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McCulloch, M.T.
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Pike, A.W.G.
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Chappell, J.
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Kinsley, L.
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Mortimer, G.
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Shelley, M.
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Murray-Wallace, C.V.
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Spötl, C.
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Taylor, L.
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Eggins, S.M.
23c7ce12-1e15-4681-b235-658676c6b733
Grün, R.
6c2d4ab3-60ac-4908-8074-63d1ea4757b1
McCulloch, M.T.
fdc05b2b-69b0-44d4-97d8-5a48b52010b5
Pike, A.W.G.
e8603e20-0a89-4d57-a294-247b983fc857
Chappell, J.
6240e143-99ad-4106-926d-1021c034376a
Kinsley, L.
5538b92a-be22-4e77-8f9c-7639bcbc107a
Mortimer, G.
ffa0cba0-c658-454e-9ecd-28e179b1d74a
Shelley, M.
517094b4-8eaa-40d1-82e6-f0ab9e57c3ad
Murray-Wallace, C.V.
56140893-75d9-484a-a103-a6cd5acdb4c6
Spötl, C.
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Taylor, L.
cb946e6a-53f2-4801-a08d-6017bd36d01b

Eggins, S.M., Grün, R., McCulloch, M.T., Pike, A.W.G., Chappell, J., Kinsley, L., Mortimer, G., Shelley, M., Murray-Wallace, C.V., Spötl, C. and Taylor, L. (2005) In situ U-series dating by laser ablation multi-collector ICPMS: new prospects for Quaternary geochronology. Quaternary Science Reviews, 24 (23-24), 2523-2538. (doi:10.1016/j.quascirev.2005.07.006).

Record type: Article

Abstract

The capabilities and potential applications of in situ dating of Quaternary materials using laser ablation-MC-ICPMS are explored. 234U/238U and 230Th/234U can be measured with precision sufficient for dating at a spatial resolution of 100 ?m or better in samples that contain as a little as 1 ppm uranium. Moreover, U and Th concentrations and U-series isotope ratios can be continuously profiled to determine changes in age that occur with sample growth (e.g. in speleothems). These capabilities additionally permit the dating of bones, teeth and possibly molluscs, which are subject to post-mortem open-system behaviour of U-series isotopes, and can be employed to elucidate processes of U-series migration during weathering and diagenesis. A drawback of laser ablation-MC-ICPMS is that it cannot in general provide U-series age estimates with the high precision and accuracy of conventional TIMS or solution MC-ICPMS methods. However, sample preparation is straightforward, the amount of sample consumed negligible, and it can be used to rapidly characterise or screen and select samples from which more precise and accurate dates can be obtained using conventional methods. Given further instrumental developments and the establishment of suitable matrix-matched standards for carbonates and other materials, we foresee that laser ablation-MC-ICPMS will play an increasingly important role in Quaternary dating research.

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Accepted/In Press date: 13 July 2005
e-pub ahead of print date: 26 September 2005
Published date: December 2005
Organisations: Archaeology

Identifiers

Local EPrints ID: 394416
URI: http://eprints.soton.ac.uk/id/eprint/394416
ISSN: 0277-3791
PURE UUID: 6b56d0e4-8c4a-4d72-ba43-ac4ee96f327d
ORCID for A.W.G. Pike: ORCID iD orcid.org/0000-0002-5610-8948

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Date deposited: 28 Jun 2016 15:54
Last modified: 10 Dec 2019 01:36

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Contributors

Author: S.M. Eggins
Author: R. Grün
Author: M.T. McCulloch
Author: A.W.G. Pike ORCID iD
Author: J. Chappell
Author: L. Kinsley
Author: G. Mortimer
Author: M. Shelley
Author: C.V. Murray-Wallace
Author: C. Spötl
Author: L. Taylor

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