Dating recent lake sediments using spheroidal carbonaceous particle (SCP)
文献类型：期刊论文
| 作者 | Wu, YH; Wang, SM; Xia, WL; Liu, J |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2005 |
| 卷号 | 50期号:10页码:1016-1020 |
| 关键词 | spheroidal carbonaceous particle time marker time sequence lake sediments Longgan Lake |
| ISSN号 | 1001-6538 |
| 英文摘要 | Dating lake sediment using sedimentary event is the supplement and calibration to traditional dating by radionuclide such as Pb-210 and (CS)-C-137. Based on the change of spheroidal carbonaceous particle (SCP) concentration, the age sequence of lake sediments can be deduced. It is one of the dating methods using sedimentary event. SCP is formed from combustion of fossil fuel at high temperature up to 1750 degrees C and at a rate of heating of approaching 10(4)degrees C/S. It can be dispersed to several hundred kilometers away from its source and deposited with precipitation or dryly deposited, and kept in sediments. Compared with Cs or Ph, there is no evidence for SCP that it decays in lake sediments and is un-removable once stored except by physical disturbance because it is mainly composed of element carbon. Handy method to extract, identify and calculate has been developed. Although fossil fuel has been used early in China, combustion at high temperature started later since emergence of electricity generation. The productivity of SCP is positively related with the generated thermal power, which is reflected as the SCP concentration in lake sediments increases with the increase of generated thermal power. Therefore, reliable sediment markers from the start of the SCP record and the remarkable variation can be used for dating purpose. In China, electricity industry started from the 1950s, and rapid increase of generated power took place since 1978. Based on these time markers, SCP time sequences of lake sediment cores LH and LL-4 from Longgan Lake, the middle reach of the Yangtze River, have been established, which is comparable with the results from Cs-137 and Pb-210, and has eliminated the errors of dating using Cs-137 and Pb-210. |
| 公开日期 | 2012-03-07 |
| 源URL | [http://159.226.73.51/handle/332005/2809]  |
| 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, YH,Wang, SM,Xia, WL,et al. Dating recent lake sediments using spheroidal carbonaceous particle (SCP)[J]. CHINESE SCIENCE BULLETIN,2005,50(10):1016-1020. |
| APA | Wu, YH,Wang, SM,Xia, WL,&Liu, J.(2005).Dating recent lake sediments using spheroidal carbonaceous particle (SCP).CHINESE SCIENCE BULLETIN,50(10),1016-1020. |
| MLA | Wu, YH,et al."Dating recent lake sediments using spheroidal carbonaceous particle (SCP)".CHINESE SCIENCE BULLETIN 50.10(2005):1016-1020. |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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