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题名: Holocene environmental variations recorded by organic-related and carbonate-related proxies of the lacustrine sediments from Bosten Lake, northwestern China
作者: Zhang, CJ(张成君); Feng, ZD; Yang, QL; Gou, XH(勾晓华); Sun, FF
收录类别: SCIE
出版日期: 2010-05
刊名: HOLOCENE
卷号: 20, 期号:3, 页码:363-373
出版者: SAGE
出版地: LONDON
英文摘要: We reconstructed a multiproxy record of the Holocene climate changes from a 9.53 m core from Bosten Lake in the southern Xinjiang of northwestern China based on a chronology supported by nine AMS (14)C dates in the hope that the previous reconstructions can be improved. Our data exhibited three timescales of variation in the water salinity of the lake. First, the upward-increasing parallel trends of major salinity proxies suggest that the salinity has been gradually increasing in the past similar to 8000 years. This constant increase in the salinity is most likely to have resulted from the shrinking of glacial cover in the central Tianshan Mountains where the inflowing river (i.e. Kaidu River) originated. Second, the C/S ratio and carbonate-based salinity proxies suggest that the lake was formed around similar to 8060 cal. yr BP and reached its maximum depth around similar to 7250 cal yr BP. The lake level then declined to the mid-and late-Holocene average level around similar to 6370 cal. yr BP and has varied drastically around a relatively constant mean during the past similar to 6370 years. Third, the past similar to 8060 yr history of the Bosten Lake can be divided into five salinity stages. That is, three high salinity intervals are separated by two low salinity intervals. The two low salinity stages occurred between similar to 6370 and similar to 5170 cal. yr BP and between similar to 3000 and similar to 2170 cal. yr BP. Each one of the three high salinity stages can be further divided into less saline and more saline substages. Specifically, less saline time intervals are: substage 2-1 (similar to 8060-similar to 7250 cal. yr BP), substage 4-2 (similar to 4370-similar to 3830 cal. yr BP) and substage 6-2 (similar to 1250-similar to 0 cal. yr BP). Also, saltier time intervals are: substage 2-2 (similar to 7250-similar to 6370 cal. yr BP), substage 4-1 (similar to 5170-similar to 4370 cal. yr BP), substage 4-3 (similar to 3830-similar to 3000 cal. yr BP) and substage 6-1 (similar to 2170-similar to 1250 cal. yr BP). It should be stressed that the phase relationships between the carbonate-based salinity proxy and diatom-based temperature proxy suggest that the salinity was mainly controlled by temperature. Finally, the comparison between the Bosten Lake salinity record and the high northern latitudinal climate pattern suggests that the lower salinity and cooler periods in Bosten Lake area correspond with abrupt climatic events (i.e. cooling events) in the high northern latitudes.
关键词: Bosten Lake ; carbonate ; Holocene ; isotopic composition ; paleoenvironmental variation ; salinity
作者部门: [Feng Zhaodong] Baylor Univ, Dept Geol, Waco, TX 76798 USA ; [Zhang Chengjun ; Feng Zhaodong ; Yang Qili ; Gou Xiaohui ; Sun Feifei] Lanzhou Univ, Lanzhou 730000, Peoples R China
通讯作者: Feng, ZD (reprint author), Baylor Univ, Dept Geol, Waco, TX 76798 USA.
学科分类: Physical Geography; Geology
文章类型: !E ieldValue">Article
所属项目编号: National Natural Science Foundation of China (NSFC) [40773064] ; National Science Foundation [G1999043501]
所属项目名称: 国家自然科学基金项目
项目资助者: NSFC
语种: 英语
DOI: 10.1177/0959683609353428
ISSN号: 0959-6836
WOS记录号: WOS:000276846700005
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/119961
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Zhang, CJ,Feng, ZD,Yang, QL,et al. Holocene environmental variations recorded by organic-related and carbonate-related proxies of the lacustrine sediments from Bosten Lake, northwestern China[J]. HOLOCENE,2010,20(3):363-373.
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