Preliminary research on Megalake Jilantai-Fletao in the arid areas of China during the Late Quaternary
文献类型：期刊论文
| 作者 | Chen FaHu1; Fan YuXin1; Chun Xi1; Madsen, D. B.2; Oviatt, C. G.3; Zhao Hui4; Yang LiPing1; Sun Yang4 |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2008-06-01 |
| 卷号 | 53期号:11页码:1725-1739 |
| 关键词 | Megalake Jilantai-Hetao shorelines lacustrine sediments late Quaternary high lake levels |
| ISSN号 | 1001-6538 |
| DOI | 10.1007/s11434-008-0227-3 |
| 通讯作者 | Chen FaHu(fhchen@lzu.edu.cn) |
| 英文摘要 | We identified geomorphological, sedimentary and biological evidence of high lake levels around the current Jilantai Salt Lake through field investigations and through analyses of regional remote sensing images. There are four groups of shorelines at elevations of around 1060,1050,1044 and 1035 m a.s.l., being 37, 27, 21 and 12 m above the current salt lake surface, respectively. Littoral deposits of sand and gravels are found at elevations between 1070 and 1080 m a.s.l., 47 to 57 m higher than the current salt lake surface, although palaeoshoreline landforms are only preserved at several sites. At Herimuxini, on the northern margin of the Ulan Buh Desert, typical lacustrine sediments and sand-gravel littoral deposits also occur at elevations of 1080 m a.s.l. and below. A 11-km-long typical spit extends eastward from this shoreline gradually reducing in elevation from 1050 to 1035 m a.s.l. In some sand-gravel quarries along the southern bank of the Yellow River on its Great Bend, such as those located near the Hydrological Gauge Station and Shilazhao Town, shoreline features were identified. Littoral deposits overlying the alluvial-diluvial layers occur in a sand quarry near Balagong in Hangjin County. There are also beachrock and littoral deposits preserved on the cut-and-built terraces at several sites along the southern piedmont of Langshan-Yinshan Mountains. In addition, a profile revealing subaqueous delta sediments was identified near Wuhai, where the Yellow River enters the basin. Typical lake sediments also exist at the Togtoh Platform on the eastern end of the Hetao Plain. Aquatic Mollusk shells are common in the littoral deposits, including several species of Corbicula, Radix lagotis, R. xauricularia and Gyraulus convexiusculus. Ostracode shells can also be identified in finer sediments. Typical vertical prograding sequences are evident in outcrops where lacustrine sediments were well preserved. Wave-rolled cobbles and beachrock are very commonly preserved on the top of profiles in the embankments at higher elevations. All this evidence suggests that there was once a huge palaeo-lake covering the Jilantai region and most part of the Hetao Plain with the highest lake level reaching similar to 1080 m a.s.l. We refer to the huge paleolake, which was larger than modern Lake Baikal, as "Megalake Jilantai-Hetao." OSL dating results indicate that the megalake formed before similar to 60-50 ka, and the four shorelines at elevations between 1060 and 1035 m a.s.l. likely represent the lake level variations from similar to 60-similar to 50 ka to the early Holocene. The discovery of the Megalake Jilantai-Hetao likely will impact understanding of the development of the Yellow River during the late Quaternary, the evolution of the Ulan Buh and Kubq deserts, neotectonism in the region, and possibly regional climatic changes. |
| 收录类别 | SCI |
| WOS关键词 | OPTICALLY STIMULATED LUMINESCENCE ; TENGGER-DESERT ; NW CHINA ; MONSOON CLIMATE ; NORTH-ATLANTIC ; ASIAN MONSOON ; GRAINS ; QUARTZ ; SEDIMENTS ; RECORDS |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000256188200016 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556080 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Chen FaHu |
| 作者单位 | 1.Lanzhou Univ, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China 2.Univ Texas Austin, Texas Archeol Res Lab, Austin, TX 78712 USA 3.Kansas State Univ, Dept Geol, Manhattan, KS 66506 USA 4.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen FaHu,Fan YuXin,Chun Xi,et al. Preliminary research on Megalake Jilantai-Fletao in the arid areas of China during the Late Quaternary[J]. CHINESE SCIENCE BULLETIN,2008,53(11):1725-1739. |
| APA | Chen FaHu.,Fan YuXin.,Chun Xi.,Madsen, D. B..,Oviatt, C. G..,...&Sun Yang.(2008).Preliminary research on Megalake Jilantai-Fletao in the arid areas of China during the Late Quaternary.CHINESE SCIENCE BULLETIN,53(11),1725-1739. |
| MLA | Chen FaHu,et al."Preliminary research on Megalake Jilantai-Fletao in the arid areas of China during the Late Quaternary".CHINESE SCIENCE BULLETIN 53.11(2008):1725-1739. |
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