中国科学院地球环境研究所机构知识库
Advanced  
IEECAS OpenIR  > 古环境研究室  > 期刊论文
学科主题: 地质学
题名: Loess magnetic properties in the Ili Basin and their correlation with the Chinese Loess Plateau
作者: Y.G. Song ;  Z.T. Shi ;  X.M. Fang ;  J.S. Nie ;  I. Naoto ;  X.K. Qiang ;  X.L. Wang
通讯作者: Y.G. Song
关键词: loess ;  magnetic property ;  magnetic susceptibility ;  the Ili Basin ;  the Chinese Loess Plateau
刊名: SCIENCE CHINA-EARTH SCIENCES
发表日期: 2010
卷: 53, 期:3, 页:419-431
收录类别: SCI
合作性质: 其它
英文摘要:      Over the past two decades, magnetoclimatological studies of loess-paleosol sequences in the Chinese Loess Plateau (CLP) have made outstanding achievements, which greatly promote the understanding of East Asian paleomonsoon evolution, inland aridification of Asia, and past global climate changes. Loess magnetic properties of the CLP have been well studied. In contrast, loess magnetic properties from outside the CLP in China have not been fully understood. We have little knowledge about the magnetic properties of loess in the Ili Basin, an intermontane depression of the Tianshan (or Tien Shan) Mountains. Here, we present the results of rock magnetic measurements of the Ili loess including mass magnetic susceptibility (χ) and anhysteretic remanent magnetization (ARM), high/low temperature dependence of susceptibility (TDS) and hysteresis, as well as X-ray diffraction (XRD) for mineral analysis. Based on the comparison with loess-paleosol sequences in the CLP (hereafter referred to as the Chinese loess), we discuss the possible magnetic susceptibility enhancement mechanism of the Ili loess. The results show that 1) the total magnetic mineral concentration of the Ili loess is far lower than that of the Chinese loess, though they have similar magnetic mineral compositions. The ferrimagnetic minerals in the Ili loess are magnetite and maghemite, and the antiferromagnetic mineral is hematite; XRD analysis also identifies the presence of ilmenite. The ratio of maghemite is lower in the Ili loess than in the Chinese loess, but the ratios of magnetite and hematite are higher in the Ili loess than in the Chinese loess. 2) The granularity of magnetic minerals in the Ili loess, dominated by pseudo-single domain (PSD) and multi-domain (MD) grains, is generally much coarser than that of the Chinese loess. Ultrafine pedogenically-produced magnetic grains have a very limited contribution to the susceptibility enhancement. Rather, PSD and MD particles of magnetite and maghemite are the main contributors to the enhancement of susceptibility in the Ili loess. 3) The susceptibility enhancement mechanism for the Ili loess is complicated and superimposes both a wind velocity/vigor model (Alaskan or Siberian model) and the in situ ultrafine grain pedogenic model; the former might play an important role in the Ili loess. 4) Magnetic susceptibility enhancements of the Ili loess are related not only to the eolian input of the source area, but also to the local climate, landform, and geological background. Therefore, great care should be taken when reconstructing paleoclimate using magnetic susceptibility data from the Ili loess.
语种: 英语
WOS记录号: WOS:000276595900011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.ieecas.cn/handle/361006/2002
Appears in Collections:古环境研究室_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
2002-2010.pdf(986KB)----开放获取View Download

Recommended Citation:
Y.G. Song,Z.T. Shi,X.M. Fang,et al. Loess magnetic properties in the Ili Basin and their correlation with the Chinese Loess Plateau[J]. SCIENCE CHINA-EARTH SCIENCES,2010,53(3):419-431.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Y.G. Song]'s Articles
 [Z.T. Shi]'s Articles
 [X.M. Fang]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Y.G. Song]‘s Articles
 [Z.T. Shi]‘s Articles
 [X.M. Fang]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
文件名: 2002-2010.pdf
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院地球环境研究所 - Feedback
Powered by CSpace