14C CHRONOSTRATIGRAPHY FOR QINGHAI LAKE IN CHINA | |
Zhou,WJ(Zhou,Weijian)[1,2,3]; Cheng,P(Cheng,Peng)[1,2]; Jull,AJY(Jull, A J Timothy)[5,6]; Lu,XF(Lu,Xuefeng)[1,2,3]; An,ZS(An,Zhisheng)[1,3]; Wang,H(Wang,Hao)[1]; Zhu,YZ(Zhu,Yizhi)[1]; Wu,ZK(Wu,Zhenkun)[1,2] | |
2014 | |
发表期刊 | Radiocarbon |
卷号 | 56期号:1页码:143-155 |
文章类型 | 期刊论文 |
摘要 | Radiocarbon accelerator mass spectrometry (AMS) techniques were used to date total organic carbon and plant seeds in the 1Fs core sequence (36°48′N, 100°08′E) from Qinghai Lake, China. This core was drilled ~18 m into Qinghai Lake sediments as part of an international cooperative research project, “Scientifc Drilling at Qinghai Lake in the Northeastern Tibetan Plateau: High-Resolution Paleoenvironmental Records of Eastern Asia Linked to Global Change,” which began in 2004. Based on the differences in lithology and total organic content (TOC) in core 1Fs, the core was divided into 3 sections for age-modeling purposes: the upper ~499 cm lacustrine silty clay to clay; the middle unit of silty clay with silt layers from 499–901 cm; and the lower 901–1861 cm silty clay, loess-like silt, and fne sand layers. Three different approaches are applied to the reservoir age problem. First, a simple linear regression gives an offset of 1342 yr. If the core is divided into three sections, linear regressions can be applied separately for the three segments, which results in an age estimate for the average hardwater effect of ~135 yr BP for the surface section up to 499 cm. If extrapolated for deeper sections, these results imply a higher reservoir offset for those two sections, which may be as much as 1143 and 2523 yr, but this assumes that there are no discontinuities in the core. A third approach using a wiggle-matching approach gave an offset of 196 yr. This study concludes that the reservoir age of Qinghai Lake is complex, but these new data add to our understanding of the 14C chronology of Qinghai Lake for the last 32 ka. |
DOI | 10.2458/56.16470 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/9856 |
专题 | 加速器质谱中心 |
通讯作者 | Zhou,WJ(Zhou,Weijian)[1,2,3] |
作者单位 | 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences,Xi’an 710075, China; 2.Shaanxi Province Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Institute of EarthEnvironment, CAS, Xi’an 710043, China; 3.Xi’an Jiao Tong University, Xi’an 710049, China; 4.NSF-Arizona AMS Laboratory, Physics Building, Department of Physics, Tucson, Arizona 85721, USA; 5.Hertelendi Laboratory for Environmental Studies, Institute for Nuclear Research, 4026 Debrecen, Hungary |
推荐引用方式 GB/T 7714 | Zhou,WJ,Cheng,P,Jull,AJY,et al. 14C CHRONOSTRATIGRAPHY FOR QINGHAI LAKE IN CHINA[J]. Radiocarbon,2014,56(1):143-155. |
APA | Zhou,WJ.,Cheng,P.,Jull,AJY.,Lu,XF.,An,ZS.,...&Wu,ZK.(2014).14C CHRONOSTRATIGRAPHY FOR QINGHAI LAKE IN CHINA.Radiocarbon,56(1),143-155. |
MLA | Zhou,WJ,et al."14C CHRONOSTRATIGRAPHY FOR QINGHAI LAKE IN CHINA".Radiocarbon 56.1(2014):143-155. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
C-14 CHRONOSTRATIGRA(676KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 请求全文 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论