Problems and potential of OSL dating Weichselian and Holocene sediments in Sweden

被引：58

作者：

Alexanderson, Helena ^{[1
,2
]}

Murray, Andrew S. ^{[2
]}

机构：

[1] Norwegian Univ Life Sci, Dept Plant & Environm Sci, NO-1432 As, Norway

[2] Aarhus Univ, Riso DTU, Nord Lab Luminescence Dating, DK-4000 Roskilde, Denmark

来源：

QUATERNARY SCIENCE REVIEWS | 2012年 / 44卷

关键词：

REGENERATIVE-DOSE PROTOCOL; SOUTHERN SWEDEN; ICE-SHEET; SINGLE-ALIQUOT; METHODOLOGICAL ASPECTS; QUATERNARY SEDIMENTS; QUARTZ OSL; LUMINESCENCE; CHRONOLOGY; DEGLACIATION;

D O I：

10.1016/j.quascirev.2009.09.020

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Recent OSL dating of various Late Quaternary deposits in Sweden has resulted in several sets of ages that appear inconsistent with geological interpretation; they usually overestimate the expected age. We explore the problems and potential of OSL-dating in Sweden by analysing quartz-OSL-ages from several known-age sites in Sweden and by investigating their luminescence properties. Two difficulties in obtaining accurate and precise ages are incomplete bleaching and low-sensitivity quartz. Incomplete bleaching can give rise to age overestimation, but the importance of this effect can be minimised by selecting suitable sediment facies, although for some settings unexplained overestimates still remain. Low quartz OSL sensitivity leads to practical problems in measurements and larger uncertainties in dose estimates, but not necessarily to systematic age overestimation. Sites that contain Dala sandstone clasts and/or sediments that may have had extensive reworking during the Quaternary seem to provide high-sensitivity quartz. We consider such sites to show the most potential for accurate and precise OSL-dating in Sweden. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：37 / 50

页数：14

共 58 条

[1]

Aitken M.J., 1985, Thermoluminescence Dating

[2]

Alexanderson H., 2008, APPL OPTICALLY STIMU, V4, P33

[3]

Alexanderson H., BOREAS IN PRESS

[4] Was southern Sweden ice free at 19-25 ka, or were the post LGM glacifluvial sediments incompletely bleached? [J].

Alexanderson, Helena ;

Murray, Andrew S. .

QUATERNARY GEOCHRONOLOGY, 2007, 2 (1-4) :229-236

[5] Residual OSL signals from modern Greenlandic river sediments [J].

Alexanderson, Helena .

GEOCHRONOMETRIA, 2007, 26 :1-9

[6] Quartz from southern Africa: sensitivity changes as a result of thermal pretreatment [J].

Armitage, SJ ;

Duller, GAT ;

Wintle, AG .

RADIATION MEASUREMENTS, 2000, 32 (5-6) :571-577

[7] Partial bleaching and the decay form characteristics of quartz OSL [J].

Bailey, RM ;

Smith, BW ;

Rhodes, EJ .

RADIATION MEASUREMENTS, 1997, 27 (02) :123-136

[8] Equivalent dose estimation using a single aliquot of polymineral fine grains [J].

Banerjee, D ;

Murray, AS ;

Botter-Jensen, L ;

Lang, A .

RADIATION MEASUREMENTS, 2001, 33 (01) :73-94

[9] Resetting of sediments mobilised by the LGM ice-sheet in southern Norway [J].

Boe, Anne-Grete ;

Murray, Andrew ;

Dahl, Svein Olaf .

QUATERNARY GEOCHRONOLOGY, 2007, 2 (1-4) :222-228

[10] Advances in luminescence instrument systems [J].

Botter-Jensen, L ;

Bulur, E ;

Duller, GAT ;

Murray, AS .

RADIATION MEASUREMENTS, 2000, 32 (5-6) :523-528

← 1 2 3 4 5 6 →