Timing for high lake levels of Qinghai Lake in the Qinghai-TibetanPlateau since the Last Interglaciation based on quartz OSL dating

ISL OpenIR > 青海盐湖研究所知识仓储

	Timing for high lake levels of Qinghai Lake in the Qinghai-TibetanPlateau since the Last Interglaciation based on quartz OSL dating
	Liu, XiangJun; Lai, ZhongPing; Fan, QiShun; Long, Hao; Sun, YongJuan
	2010
发表期刊	QUATERNARY GEOCHRONOLOGY
ISSN	1871-1014
卷号	5 期号:2-3 页码:218-222
摘要	Qinghai Lake is situated in the northeast of the Qinghai-Tibetan Plateau (QTP). Its size and proximity to the junction of three major climate systems make it sensitive to climate changes. Some investigations on shorelines of Qinghai Lake suggested highstands during MIS 3, but to what extent the lake level was higher than today is yet undetermined. Others proposed that the maximum highstands probably dated to MIS 5. It has also been shown that the lake level 120 m higher than today occurred at around 12 ka. Most of these previous ages were obtained using (14)C dating or multiple-aliquot IRSL/OSL dating. For (14)C dating, because of the dating limit (<40 ka) and the lack of suitable dating materials in this arid area, it is difficult to establish reliable chronological control. In the present study, seven samples collected from lacustrine deposits (five samples) and sand wedges (two samples) were dated using quartz optically stimulated luminescence (OSL) with the single aliquot regenerative-dose (SAR) protocol. OSL dating results showed that (1) the lake had experienced two high lake levels, one was in MIS 5 and another in early to middle MIS 3: (2) no evidence of high lake levels in MIS 4 has been found; (3) the alluvial gravels, whose surface is at an elevation of 3246 m, were formed at least 28.8 +/- 23 ka ago, and the widespread sand wedges within the alluvial gravels were formed during the period of 15.1-28.8 ka, which implied that the lake level had not reached an elevation of 3240 m after 28.8 +/- 2.3 ka. (C) 2009 Elsevier BM. All rights reserved. Qinghai Lake is situated in the northeast of the Qinghai-Tibetan Plateau (QTP). Its size and proximity to the junction of three major climate systems make it sensitive to climate changes. Some investigations on shorelines of Qinghai Lake suggested highstands during MIS 3, but to what extent the lake level was higher than today is yet undetermined. Others proposed that the maximum highstands probably dated to MIS 5. It has also been shown that the lake level 120 m higher than today occurred at around 12 ka. Most of these previous ages were obtained using (14)C dating or multiple-aliquot IRSL/OSL dating. For (14)C dating, because of the dating limit (<40 ka) and the lack of suitable dating materials in this arid area, it is difficult to establish reliable chronological control. In the present study, seven samples collected from lacustrine deposits (five samples) and sand wedges (two samples) were dated using quartz optically stimulated luminescence (OSL) with the single aliquot regenerative-dose (SAR) protocol. OSL dating results showed that (1) the lake had experienced two high lake levels, one was in MIS 5 and another in early to middle MIS 3: (2) no evidence of high lake levels in MIS 4 has been found; (3) the alluvial gravels, whose surface is at an elevation of 3246 m, were formed at least 28.8 +/- 23 ka ago, and the widespread sand wedges within the alluvial gravels were formed during the period of 15.1-28.8 ka, which implied that the lake level had not reached an elevation of 3240 m after 28.8 +/- 2.3 ka. (C) 2009 Elsevier BM. All rights reserved.
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/1925
专题	青海盐湖研究所知识仓储
推荐引用方式 GB/T 7714	Liu, XiangJun,Lai, ZhongPing,Fan, QiShun,et al. Timing for high lake levels of Qinghai Lake in the Qinghai-TibetanPlateau since the Last Interglaciation based on quartz OSL dating[J]. QUATERNARY GEOCHRONOLOGY,2010,5(2-3):218-222.
APA	Liu, XiangJun,Lai, ZhongPing,Fan, QiShun,Long, Hao,&Sun, YongJuan.(2010).Timing for high lake levels of Qinghai Lake in the Qinghai-TibetanPlateau since the Last Interglaciation based on quartz OSL dating.QUATERNARY GEOCHRONOLOGY,5(2-3),218-222.
MLA	Liu, XiangJun,et al."Timing for high lake levels of Qinghai Lake in the Qinghai-TibetanPlateau since the Last Interglaciation based on quartz OSL dating".QUATERNARY GEOCHRONOLOGY 5.2-3(2010):218-222.