Luminescence properties and optically (post-IR blue-light) stimulated luminescence dating of limnic sediments from northern Lake Malawi - Chances and limitations

Annette Kadereit; Regina DeWitt; Thomas C. Johnson

doi:10.1016/j.quageo.2012.02.021

Luminescence properties and optically (post-IR blue-light) stimulated luminescence dating of limnic sediments from northern Lake Malawi - Chances and limitations

Annette Kadereit, Regina DeWitt, Thomas C. Johnson

Continental Scientific Drilling Facility

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Affected by the shifting Intertropical Convergence Zone, Lake Malawi holds an outstanding limnic sediment archive storing palaeo-environmental information of a climatically highly responsive landscape in the East African Rift Valley. Reliable chronological data are essential to interpret the lake-bottom sediments and optically stimulated luminescence (OSL) dating is an important method to build up the chronology. We report on material-property studies and OSL-dating results for polymineral fine grains extracted from piston cores obtained from the northern basin of Lake Malawi during the 1998 campaign of the International Decade of the East African Lakes (IDEAL). OSL-dating is based on a post-IR blue (pIRB) light stimulation single aliquot regeneration (SAR) protocol. Our results support earlier publications demonstrating the general applicability of OSL-dating on Lake Malawi sediments of Holocene and late Pleistocene age. However, the study also shows that dose rate estimations imply major challenges which need to be investigated in more detail to improve future OSL-dating results.

Original language	English (US)
Pages (from-to)	160-166
Number of pages	7
Journal	Quaternary Geochronology
Volume	10
DOIs	https://doi.org/10.1016/j.quageo.2012.02.021
State	Published - Jul 2012

Bibliographical note

Funding Information:
Sample material, stratigraphic descriptions and results of the measured water contents were provided by the Large Lakes Observatory, Duluth, USA. All other measurements in preparation of and in the course of the luminesence dating were carried out at the Heidelberg luminescence laboratory, at its former site of the Forschungsstelle Archaeometry of the Heidelberg Academy of Sciences at the Max-Planck Department of Nuclear Physics, Germany. The work was funded by the German Science Foundation . The authors would like to thank an anonymous reviewer for very constructive comments on the manuscript.

Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.

Keywords

Dose rate uncertainties
Lake Malawi
Lake sediments
Luminescence dating

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title = "Luminescence properties and optically (post-IR blue-light) stimulated luminescence dating of limnic sediments from northern Lake Malawi - Chances and limitations",

abstract = "Affected by the shifting Intertropical Convergence Zone, Lake Malawi holds an outstanding limnic sediment archive storing palaeo-environmental information of a climatically highly responsive landscape in the East African Rift Valley. Reliable chronological data are essential to interpret the lake-bottom sediments and optically stimulated luminescence (OSL) dating is an important method to build up the chronology. We report on material-property studies and OSL-dating results for polymineral fine grains extracted from piston cores obtained from the northern basin of Lake Malawi during the 1998 campaign of the International Decade of the East African Lakes (IDEAL). OSL-dating is based on a post-IR blue (pIRB) light stimulation single aliquot regeneration (SAR) protocol. Our results support earlier publications demonstrating the general applicability of OSL-dating on Lake Malawi sediments of Holocene and late Pleistocene age. However, the study also shows that dose rate estimations imply major challenges which need to be investigated in more detail to improve future OSL-dating results.",

keywords = "Dose rate uncertainties, Lake Malawi, Lake sediments, Luminescence dating",

author = "Annette Kadereit and Regina DeWitt and Johnson, {Thomas C.}",

note = "Funding Information: Sample material, stratigraphic descriptions and results of the measured water contents were provided by the Large Lakes Observatory, Duluth, USA. All other measurements in preparation of and in the course of the luminesence dating were carried out at the Heidelberg luminescence laboratory, at its former site of the Forschungsstelle Archaeometry of the Heidelberg Academy of Sciences at the Max-Planck Department of Nuclear Physics, Germany. The work was funded by the German Science Foundation . The authors would like to thank an anonymous reviewer for very constructive comments on the manuscript. Copyright: Copyright 2012 Elsevier B.V., All rights reserved.",

year = "2012",

month = jul,

doi = "10.1016/j.quageo.2012.02.021",

language = "English (US)",

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pages = "160--166",

journal = "Quaternary Geochronology",

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AU - Kadereit, Annette

AU - DeWitt, Regina

AU - Johnson, Thomas C.

N1 - Funding Information: Sample material, stratigraphic descriptions and results of the measured water contents were provided by the Large Lakes Observatory, Duluth, USA. All other measurements in preparation of and in the course of the luminesence dating were carried out at the Heidelberg luminescence laboratory, at its former site of the Forschungsstelle Archaeometry of the Heidelberg Academy of Sciences at the Max-Planck Department of Nuclear Physics, Germany. The work was funded by the German Science Foundation . The authors would like to thank an anonymous reviewer for very constructive comments on the manuscript. Copyright: Copyright 2012 Elsevier B.V., All rights reserved.

PY - 2012/7

Y1 - 2012/7

N2 - Affected by the shifting Intertropical Convergence Zone, Lake Malawi holds an outstanding limnic sediment archive storing palaeo-environmental information of a climatically highly responsive landscape in the East African Rift Valley. Reliable chronological data are essential to interpret the lake-bottom sediments and optically stimulated luminescence (OSL) dating is an important method to build up the chronology. We report on material-property studies and OSL-dating results for polymineral fine grains extracted from piston cores obtained from the northern basin of Lake Malawi during the 1998 campaign of the International Decade of the East African Lakes (IDEAL). OSL-dating is based on a post-IR blue (pIRB) light stimulation single aliquot regeneration (SAR) protocol. Our results support earlier publications demonstrating the general applicability of OSL-dating on Lake Malawi sediments of Holocene and late Pleistocene age. However, the study also shows that dose rate estimations imply major challenges which need to be investigated in more detail to improve future OSL-dating results.

AB - Affected by the shifting Intertropical Convergence Zone, Lake Malawi holds an outstanding limnic sediment archive storing palaeo-environmental information of a climatically highly responsive landscape in the East African Rift Valley. Reliable chronological data are essential to interpret the lake-bottom sediments and optically stimulated luminescence (OSL) dating is an important method to build up the chronology. We report on material-property studies and OSL-dating results for polymineral fine grains extracted from piston cores obtained from the northern basin of Lake Malawi during the 1998 campaign of the International Decade of the East African Lakes (IDEAL). OSL-dating is based on a post-IR blue (pIRB) light stimulation single aliquot regeneration (SAR) protocol. Our results support earlier publications demonstrating the general applicability of OSL-dating on Lake Malawi sediments of Holocene and late Pleistocene age. However, the study also shows that dose rate estimations imply major challenges which need to be investigated in more detail to improve future OSL-dating results.

KW - Dose rate uncertainties

KW - Lake Malawi

KW - Lake sediments

KW - Luminescence dating

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Luminescence properties and optically (post-IR blue-light) stimulated luminescence dating of limnic sediments from northern Lake Malawi - Chances and limitations

Abstract

Bibliographical note

Keywords

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