Late Quaternary aridity in the southwestern Kalahari Desert: New contributions from Optically Simulated Luminescence (OSL) dating of aeolian deposits, northern Cape Province, South Africa

被引：0

作者：

Thomas, DSG ^{[1
]}

O'Connor, PW ^{[1
]}

Stokes, S ^{[1
]}

机构：

[1] Univ Sheffield, Dept Geog, Sheffield Ctr Int Dryland Res, Sheffield S10 2TN, S Yorkshire, England

来源：

QUATERNARY DESERTS AND CLIMATIC CHANGE | 1998年

关键词：

D O I：

暂无

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Optically stimulated luminescence (OSL) dating of quartz samples from linear and lunette dune sites in the southwestern Kalahari Desert indicates that dune building episodes occurred in the region at 11-13 ka ago and 1-1.5 ka ago. The formation of the dunes appear to have been single phase events. Climatic conditions responsible for dune building are considered, suggesting enhanced aridity and possibly greater windiness were contributory factors. Further analysis of other samples for OSL dating from the dunefield will allow a clearer picture of the temporal and spatial dynamics of late Quaternary aridity to be developed, but the ages indicated by this study accord well with palynological and palaeontological evidence for increased dryness in this part of the southern African summer rainfall zone.

引用

页码：213 / 224

页数：12

共 3 条

[1] Late Quaternary lunette dune sedimentation in the southwestern Kalahari desert, South Africa: luminescence based chronologies of aeolian activity
Lawson, MP
Thomas, DSG
QUATERNARY SCIENCE REVIEWS, 2002, 21 (07) : 825 - 836
[2] LATE QUATERNARY ENVIRONMENTAL CHANGES FROM AEOLIAN AND FLUVIAL GEOARCHIVES IN THE SOUTHWESTERN KALAHARI, SOUTH AFRICA: IMPLICATIONS FOR PAST AFRICAN CLIMATE DYNAMICS
Huerkamp, K.
Voelkel, J.
Heine, K.
Bens, O.
Leopold, M.
Winkelbauer, J.
SOUTH AFRICAN JOURNAL OF GEOLOGY, 2011, 114 (3-4) : 459 - 474
[3] Late Quaternary palaeohydrological changes in the northern Namib Sand Sea: New chronologies using OSL dating of interdigitated aeolian and water-lain interdune deposits
Stone, A. E. C.
Thomas, D. S. G.
Viles, H. A.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, 2010, 288 (1-4) : 35 - 53

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