IOCAS-IR  > 海洋地质与环境重点实验室
Pervasive autocorrelation of the chemical index of alteration in sedimentary profiles and its palaeoenvironmental implications
Xiao, Shangbin1,2; Liu, Weiguo1; Li, Anchun3; Yang, Shouye4; Lai, Zhongping2; Xiao, SB, Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710075, Peoples R China
2010-02-01
发表期刊SEDIMENTOLOGY
ISSN0037-0746
卷号57期号:2页码:670-676
文章类型Article
摘要The chemical index of alteration has been used widely for reconstruction of the palaeoclimate. However, the mechanisms and environmental factors controlling the chemical index of alteration of sediments are not yet fully understood. In this study, autocorrelations of the chemical index of alteration in nine sedimentary profiles, from both the land and the sea, spanning different geological times, are discussed. The sediments of these profiles have different origins (dust, fluvial or ocean sediments) and are from various climate situations and sedimentary environments. Autocorrelations of chemical index of alteration series are ubiquitously evident in all profiles. It is suggested here that autocorrelations may be caused by post-depositional changes such as persistent weathering and diagenesis. As a result, the chemical index of alteration may not reflect climatic conditions during the time of sediment deposition. This study strongly recommends the confirmation of the reliability and veracity of the chemical index of alteration before it is adopted to evaluate the weathering degree of parent rocks and to reconstruct the past climate. Significant autocorrelations in loess profiles were specifically observed, suggesting that the existing understanding of loess deposition in terms of climate conditions requires re-examination, and that previous reconstructions of rapid climate changes (for example, in centennial-millennial scales) should be treated with caution.; The chemical index of alteration has been used widely for reconstruction of the palaeoclimate. However, the mechanisms and environmental factors controlling the chemical index of alteration of sediments are not yet fully understood. In this study, autocorrelations of the chemical index of alteration in nine sedimentary profiles, from both the land and the sea, spanning different geological times, are discussed. The sediments of these profiles have different origins (dust, fluvial or ocean sediments) and are from various climate situations and sedimentary environments. Autocorrelations of chemical index of alteration series are ubiquitously evident in all profiles. It is suggested here that autocorrelations may be caused by post-depositional changes such as persistent weathering and diagenesis. As a result, the chemical index of alteration may not reflect climatic conditions during the time of sediment deposition. This study strongly recommends the confirmation of the reliability and veracity of the chemical index of alteration before it is adopted to evaluate the weathering degree of parent rocks and to reconstruct the past climate. Significant autocorrelations in loess profiles were specifically observed, suggesting that the existing understanding of loess deposition in terms of climate conditions requires re-examination, and that previous reconstructions of rapid climate changes (for example, in centennial-millennial scales) should be treated with caution.
关键词Autocorrelation Chemical Index Of Alteration Palaeoclimate Change Post-sedimentation Sedimentary Profiles
学科领域Geology
DOI10.1111/j.1365-3091.2009.01113.x
URL查看原文
收录类别SCI
语种英语
WOS记录号WOS:000273669500016
引用统计
被引频次:27[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/1838
专题海洋地质与环境重点实验室
通讯作者Xiao, SB, Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710075, Peoples R China
作者单位1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710075, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
4.Tongji Univ, Dept Marine Geol, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
推荐引用方式
GB/T 7714
Xiao, Shangbin,Liu, Weiguo,Li, Anchun,et al. Pervasive autocorrelation of the chemical index of alteration in sedimentary profiles and its palaeoenvironmental implications[J]. SEDIMENTOLOGY,2010,57(2):670-676.
APA Xiao, Shangbin,Liu, Weiguo,Li, Anchun,Yang, Shouye,Lai, Zhongping,&Xiao, SB, Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710075, Peoples R China.(2010).Pervasive autocorrelation of the chemical index of alteration in sedimentary profiles and its palaeoenvironmental implications.SEDIMENTOLOGY,57(2),670-676.
MLA Xiao, Shangbin,et al."Pervasive autocorrelation of the chemical index of alteration in sedimentary profiles and its palaeoenvironmental implications".SEDIMENTOLOGY 57.2(2010):670-676.
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
Xiao-2010-Pervasive (411KB) 限制开放--浏览
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Xiao, Shangbin]的文章
[Liu, Weiguo]的文章
[Li, Anchun]的文章
百度学术
百度学术中相似的文章
[Xiao, Shangbin]的文章
[Liu, Weiguo]的文章
[Li, Anchun]的文章
必应学术
必应学术中相似的文章
[Xiao, Shangbin]的文章
[Liu, Weiguo]的文章
[Li, Anchun]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Xiao-2010-Pervasive autocorrel.pdf
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 

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。