Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1191/0959683605hl854ra |
Optical dating of a scroll-bar sequence on the Klip River, South Africa, to derive the lateral migration rate of a meander bend | |
Rodnight, H; Duller, GAT; Tooth, S; Wintle, AG | |
通讯作者 | Rodnight, H |
来源期刊 | HOLOCENE |
ISSN | 0959-6836 |
EISSN | 1477-0911 |
出版年 | 2005 |
卷号 | 15期号:6页码:802-811 |
英文摘要 | Problems are often encountered in accurately establishing the rates of processes associated with river channel change. In this study, optical dating was used to obtain the lateral migration rate of an abandoned meander bend on the Klip River, eastern Free State, South Africa. Five samples were collected by augering along a transect across an approximately 200-m-wide scroll-bar sequence on the inner meander bend, and an additional sample was collected from the channel fill of the related oxbow lake. Optically stimulated luminescence (OSL) ages were derived for each sample using the single-aliquot regenerative-dose protocol on small aliquots of quartz. Incomplete bleaching was evident in some of the samples and thus the appropriate statistical analysis was performed using the ’finite mixture model’ for the scroll-bar samples and the ’minimum age model’ for the channel-fill sample. The ages calculated were in the correct chronological order for the depositional sequence, which was formed over the last similar to 1000 years. The average rate of lateral migration across the scroll-bar sequence was found to be similar to 0.16 m/ yr but with an apparent increase in the rate occurring during the early sixteenth century. Where quartz- rich alluvium exists, the methods used in this study can potentially be applied to other river systems, enabling rates of channel change processes to be determined. |
英文关键词 | Klip River meander lateral migration luminescence dating optical dating scroll bar South Africa late Holocene |
类型 | Article |
语种 | 英语 |
国家 | Wales |
收录类别 | SCI-E |
WOS记录号 | WOS:000231527900003 |
WOS关键词 | CHANNEL MIGRATION ; LUMINESCENCE CHRONOLOGY ; FLUVIAL QUARTZ ; QUATERNARY SEDIMENTS ; STATISTICAL-MODELS ; CLIMATE-CHANGE ; BEATTON RIVER ; THAR DESERT ; SINGLE ; INDIA |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/149198 |
作者单位 | (1)Univ Wales, Inst Geog & Earth Sci, Aberystwyth SY23 3DB, Dyfed, Wales |
推荐引用方式 GB/T 7714 | Rodnight, H,Duller, GAT,Tooth, S,et al. Optical dating of a scroll-bar sequence on the Klip River, South Africa, to derive the lateral migration rate of a meander bend[J],2005,15(6):802-811. |
APA | Rodnight, H,Duller, GAT,Tooth, S,&Wintle, AG.(2005).Optical dating of a scroll-bar sequence on the Klip River, South Africa, to derive the lateral migration rate of a meander bend.HOLOCENE,15(6),802-811. |
MLA | Rodnight, H,et al."Optical dating of a scroll-bar sequence on the Klip River, South Africa, to derive the lateral migration rate of a meander bend".HOLOCENE 15.6(2005):802-811. |
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