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题名: Developing inorganic carbon-based radiocarbon chronologies for Holocene lake sediments in arid NW China
作者: Zhang, JW; Ma, XY; Qiang, MR; Huang, XZ; Li, S; Guo, XY; Henderson, ACG; Holmes, JA; Chen, FH(陈发虎)
收录类别: SCIE ; EI
出版日期: 2016-07-15
刊名: QUATERNARY SCIENCE REVIEWS
卷号: 144, 页码:66-82
出版者: ELSEVIER
出版地: OXFORD
英文摘要: Inorganic carbonates are often used to establish radiocarbon (C-14) chronologies for lake sediments when terrestrial plant remains (TPR) are rare or when bulk organic matter is insufficient for dating, a problem that is common for many lakes in arid regions. However, the reservoir effect (RE), as well as old carbon contributed from the lakes catchment make it difficult to establish reliable chronologies. Here we present a systematic study of inorganic C-14 ages of two lake-sediment sequences, one from a small-enclosed saline lake - Lake Gahai in Qaidam Basin, and the other from a large freshwater lake - Lake Bosten in Xinjiang. Modern dissolved inorganic carbon (DIC) of the lakes, paleo-lake sediments exposed in the catchment, and mollusk shells in core sediments from Lake Gahai were dated to assess the RE and the contribution of pre-aged carbon to the old ages in the cores. We propose a statistical regression to assess more than one RE for the C-14 carbonate ages within our sedimentary sequences. Old radiocarbon ages contributed by detrital carbonates were assessed by comparing the ages of mollusk shells with those of carbonates at the same sediment depths. We established the RE of the authigenic component and assessed detrital old carbon contributions to our two sites, and this was used to correct the C-14 ages. Based on this approach, we developed age models for both cores, and tested them using Pb-210 ages in both cores and TPR-based C-14-ages recovered from Lake Bosten. We further tested our age models by comparing carbonate-based oxygen isotope (delta O-18) records from both lakes to an independently-dated regional speleothem delta O-18 record. Our results suggest if sedimentary sequences are densely dated and the RE and the contribution of old carbon from detrital carbonates can be ascertained, robust chronological frameworks based on carbonate-based C-14 determinations can be established. (C) 2016 Elsevier Ltd. All rights reserved.
关键词: Inorganic carbon ; Radiocarbon dating ; Lake sediments ; Reservoir effect ; NW China
作者部门: [Zhang, Jiawu ; Ma, Xueyang ; Qiang, Mingrui ; Huang, Xiaozhong ; Li, Shuang ; Guo, Xiaoyan ; Chen, Fahu] Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China ; [Henderson, Andrew C. G.] Newcastle Univ, Sch Geog Polit & Sociol, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England ; [Holmes, Jonathan A.] UCL, Dept Geog, Environm Change Res Ctr, Pearson Bldg,Gower St, London WC1E 6BT, England
通讯作者: Zhang, JW (reprint author), Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China.
学科分类: Physical Geography; Geology
文章类型: Article
所属项目编号: National Science Foundation of China (NSFC) [41271220] ; National Basic Research Program of China [2012CB956102] ; NSFC key project [41130102]
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划)
项目资助者: NSFC ; MOST
语种: 英语
DOI: 10.1016/j.quascirev.2016.05.034
ISSN号: 0277-3791
WOS记录号: WOS:000379104800006
EI记录号: 20162302459621
IR记录号: WOS:000379104800006
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/182345
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Zhang, JW,Ma, XY,Qiang, MR,et al. Developing inorganic carbon-based radiocarbon chronologies for Holocene lake sediments in arid NW China[J]. QUATERNARY SCIENCE REVIEWS,2016,144:66-82.
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