Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/S1040-6182(02)00137-4 |
Luminescence chronology of aeolian deposition during the Late Quaternary on the southern margin of Thar Desert, India | |
Juyal, N; Kar, A; Rajaguru, SN; Singhvi, AK | |
通讯作者 | Singhvi, AK |
来源期刊 | QUATERNARY INTERNATIONAL |
ISSN | 1040-6182 |
出版年 | 2003 |
卷号 | 104页码:87-98 |
英文摘要 | Aeolian deposits constitute the uppermost lithostratigraphic unit in the southern margin of the Thar desert. They occur as poorly organized dunes resting on the upper part of a major fluvial sequence. Considerable evidence exists to show that the southern margin witnessed fluvial aggradation before the onset of dune accretion. Transition from a dominantly fluvial phase to aeolian deposition was gradational. Blue-green light stimulated luminescence chronometry of six fossil dunes indicates that the dune building activity started around 26 ka and continued episodically until around 5 ka. Evidence of a phase of landscape stability is seen corresponding to the interval 11-9 ka. This is also reflected by the presence of Stone Age artifacts (microliths) and fluvially reworked aeolian sand, and corresponds to the strengthening of the southwest monsoon in the region. A progressive northward shift through time in the parameters controlling dune building activity is seen. Aeolian accretion in the southern part (Mahi basin) ended around 10 ka, whereas in the northern Sabarmati it continued until around 5 ka and in the case of core regions of Thar, it continued until 0.6 ka. The southern margins of the Thar Desert thus have not experienced any major aeolian deposition since 5 ka. (C) 2002 Elsevier Science Ltd and INQUA. All rights reserved. |
类型 | Article ; Proceedings Paper |
语种 | 英语 |
国家 | India |
收录类别 | CPCI-S ; SCI-E |
WOS记录号 | WOS:000181589100008 |
WOS关键词 | WESTERN INDIA ; ENVIRONMENTAL-CHANGES ; NORTHWESTERN INDIA ; NORTH GUJARAT ; AFRICA ; BASIN ; RAJASTHAN ; SEDIMENTS ; SYSTEMS ; MONSOON |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | ICAR Central Arid Zone Research Institute |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/145728 |
作者单位 | (1)Phys Res Lab, Div Earth Sci, Ahmedabad 380009, Gujarat, India;(2)Cent Arid Zone Res Inst, Jodhpur 342003, Rajasthan, India;(3)Deccan Coll, Pune 411006, Maharashtra, India |
推荐引用方式 GB/T 7714 | Juyal, N,Kar, A,Rajaguru, SN,et al. Luminescence chronology of aeolian deposition during the Late Quaternary on the southern margin of Thar Desert, India[J]. ICAR Central Arid Zone Research Institute,2003,104:87-98. |
APA | Juyal, N,Kar, A,Rajaguru, SN,&Singhvi, AK.(2003).Luminescence chronology of aeolian deposition during the Late Quaternary on the southern margin of Thar Desert, India.QUATERNARY INTERNATIONAL,104,87-98. |
MLA | Juyal, N,et al."Luminescence chronology of aeolian deposition during the Late Quaternary on the southern margin of Thar Desert, India".QUATERNARY INTERNATIONAL 104(2003):87-98. |
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