Residual OSL signals from modern Greenlandic river sediments
(2007) In Geochronometria 26. p.1-9- Abstract
- Ripple-laminated sandy deposits at shallow water depths in four rivers on Jameson Land, East Greenland were sampled for optically stimulated luminescence (OSL) dating. Silt-sized grains have significantly higher equivalent doses (similar to 1.1 Gy) than sand grains (similar to 0.1 Gy). This suggests that coarse grain-size fractions are better bleached and more suitable than fine grains for OSL dating of glaciofluvial/fluvial sediments. A sample from a sidebar deposited during the spring flood yielded 1.0 Gy (similar to 500 years) while a subaerial deposit was completely zeroed. The spring flood deposit is considered to be most similar to deglacial conditions and incomplete bleaching of this amount (1 Gy) is generally not a significant... (More)
- Ripple-laminated sandy deposits at shallow water depths in four rivers on Jameson Land, East Greenland were sampled for optically stimulated luminescence (OSL) dating. Silt-sized grains have significantly higher equivalent doses (similar to 1.1 Gy) than sand grains (similar to 0.1 Gy). This suggests that coarse grain-size fractions are better bleached and more suitable than fine grains for OSL dating of glaciofluvial/fluvial sediments. A sample from a sidebar deposited during the spring flood yielded 1.0 Gy (similar to 500 years) while a subaerial deposit was completely zeroed. The spring flood deposit is considered to be most similar to deglacial conditions and incomplete bleaching of this amount (1 Gy) is generally not a significant source of error for sediments of Pleistocene age. Most samples have rather poor luminescence characteristics and are affected by thermal transfer if preheat temperatures at or above 260 degrees C are used. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4450055
- author
- Alexanderson, Helena LU
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- luminescence dating, OSL, glaciofluvial, fluvial, bleaching, Greenland
- in
- Geochronometria
- volume
- 26
- pages
- 1 - 9
- publisher
- WIND-J WOJEWODA PUBLISHING CO.
- external identifiers
-
- wos:000246628600001
- scopus:34547540845
- ISSN
- 1897-1695
- DOI
- 10.2478/v10003-007-0001-6
- language
- English
- LU publication?
- no
- id
- 683cca35-0515-4170-83a5-9ac04dcd8b0c (old id 4450055)
- date added to LUP
- 2016-04-01 12:31:02
- date last changed
- 2022-01-27 06:10:51
@article{683cca35-0515-4170-83a5-9ac04dcd8b0c,
abstract = {{Ripple-laminated sandy deposits at shallow water depths in four rivers on Jameson Land, East Greenland were sampled for optically stimulated luminescence (OSL) dating. Silt-sized grains have significantly higher equivalent doses (similar to 1.1 Gy) than sand grains (similar to 0.1 Gy). This suggests that coarse grain-size fractions are better bleached and more suitable than fine grains for OSL dating of glaciofluvial/fluvial sediments. A sample from a sidebar deposited during the spring flood yielded 1.0 Gy (similar to 500 years) while a subaerial deposit was completely zeroed. The spring flood deposit is considered to be most similar to deglacial conditions and incomplete bleaching of this amount (1 Gy) is generally not a significant source of error for sediments of Pleistocene age. Most samples have rather poor luminescence characteristics and are affected by thermal transfer if preheat temperatures at or above 260 degrees C are used.}},
author = {{Alexanderson, Helena}},
issn = {{1897-1695}},
keywords = {{luminescence dating; OSL; glaciofluvial; fluvial; bleaching; Greenland}},
language = {{eng}},
pages = {{1--9}},
publisher = {{WIND-J WOJEWODA PUBLISHING CO.}},
series = {{Geochronometria}},
title = {{Residual OSL signals from modern Greenlandic river sediments}},
url = {{http://dx.doi.org/10.2478/v10003-007-0001-6}},
doi = {{10.2478/v10003-007-0001-6}},
volume = {{26}},
year = {{2007}},
}