Magnetic properties of surface soils across the southern Tarim Basin and their relationship with climate and source materials

查看全文 作　　者：ZAN [1,2]JinBo;FANG [1,2]XiaoMin;NIE [2]JunSheng;YANG [3,1]ShengLi;SONG [2]ChunHui;DAI [2]Shuang

机构地区：[1]Center for Basin Resource and Environment, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China;[2]Key Laboratory of Western China's Environmental Systems, Ministry of Education of China, Lanzhou 730000, China;[3]College of Geography Science, Nanjing Normal University, Nanjing 210046, China

出　　处：《Chinese Science Bulletin》索引2011年第56卷第3期,共7页

基　　金：supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (KZCXZ2-YW-Q09-04);the National Natural Science Foundation of China (40972122,40402017 and 40920114001) 摘　　要：The magnetic susceptibility (χ) of surface soils on the Chinese Loess Plateau (CLP) has strong positive correlation with mean annual precipitation.It is widely accepted that ultrafine magnetite/maghemite grains produced during pedogenesis are responsible for the enhancement of χ,and loess χ on the CLP has been widely used as a proxy for the intensity of the East Asian summer monsoon.However,few works have investigated mechanisms for the enhancement of χ in the case of surface aeolian sediments in westerly-dominated inland China,north of the Tibetan Plateau.Here detailed rock magnetism and grain size studies of 49 surface samples taken across the southern Tarim Basin for different rainfall/temperature/altitude conditions are presented.The results show that samples taken from desert have the lowest χ values and that χ of loessic sand and loess samples decreases with increasing altitude.In addition,the rock magnetism studies suggest that the magnetic properties of surface soils across the southern Tarim Basin are mainly controlled by the concentration of coarse aeolian ferrimagnetic minerals.The contribution of ultrafine pedogenically produced magnetic grains to χ is very limited. 关键词：塔里木盆地表层土壤磁学性质中国黄土高原材料气候青藏高原北部岩石磁学

相关文献

参考文献（30）
引证文献（5）
耦合文献（301）

参考文献(30)

引证文献(5)

耦合文献(301)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Magnetic properties of surface soils across the southern Tarim Basin and their relationship with climate and source materials

参考文献(30)

引证文献(5)

耦合文献(301)

用户提示