Chronology of Holocene lacustrine sediments in Co Ngoin, central Tibetan Plateau
文献类型：期刊论文
| 作者 | Wu Yanhong; Wang Sumin; Hou Xinhua |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2006 |
| 卷号 | 49期号:9页码:991-1001 |
| 关键词 | C-14 Pb-210 and (CS)-C-137 chronology lacustrine sediments climatic event Co Ngoin central Tibetan Plateau |
| ISSN号 | 1006-9313 |
| 英文摘要 | Chronology is the basis for using lacustrine sediments to reconstruct the history of environmental change. Radioactive-nuclides such as C-14, Pb-210 and Cs-137 dating are mainly used to establish the chronology for recent several ten thousand years. Because of being mixed with "dead carbon", the measured C-14 age is always older than the actual age which is recognized as "reservoir effect". Cs is a kind of active metal element, and easy to migrate vertically in the sediment that leads to the error of the time marker. Pb-210 dating should make sure to select CIC model or CRIS model. On the Tibetan Plateau, most of the lakes are alkaline closed lake where Cs is more moveable in the sediment and the reservoir effect caused by "dead carbon" on C-14 dating is stronger. Based on the analysis on results of C-14, Pb-210 and Cs-137 of the lacustrine sediments from Co Ngoin, central Tibetan Plateau, we use the simple regression method to re-calculate the C-14 calendar ages, and establish the time sequence for cores CE-1 and CE-2 with result of Pb-210 CRS model for the upper 35 cm and recalculated C-14 calendar age for sediments bellow 35 cm. Since 1400 cal. a BP, sedimentation interrupted for more than 1000 years. According to this time sequence, variations of environmental proxies confidently reflect the major climatic events in Holocene. |
| 公开日期 | 2012-03-08 |
| 源URL | [http://159.226.73.51/handle/332005/2939]  |
| 专题 | 南京地理与湖泊研究所_湖泊室 |
| 推荐引用方式 GB/T 7714 | Wu Yanhong,Wang Sumin,Hou Xinhua. Chronology of Holocene lacustrine sediments in Co Ngoin, central Tibetan Plateau[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49(9):991-1001. |
| APA | Wu Yanhong,Wang Sumin,&Hou Xinhua.(2006).Chronology of Holocene lacustrine sediments in Co Ngoin, central Tibetan Plateau.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49(9),991-1001. |
| MLA | Wu Yanhong,et al."Chronology of Holocene lacustrine sediments in Co Ngoin, central Tibetan Plateau".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49.9(2006):991-1001. |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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