| ZHANG Jialin (张佳琳)* ** ***,ZHAO Zhongqiang
* ** ***,XIA Dinghong
* ** ***,LI Zhenyang
* ** ***,ZENG Liyuan
* ** ***,HE Hongming
**** *****,SONG Yinxian
* ** ***,CHEN Zhong
* ** ***.[J].高技术通讯(英文),2024,30(3):310~321 |
|
| Geochemical characteristics and environmental implications of loess sequences in the Loess Plateau |
| |
| DOI：10. 3772 / j. issn. 1006-6748. 2024. 03. 011 |
| 中文关键词: |
| 英文关键词: loess, chemical weathering, element geochemistry, chemical index of alteration (CIA) |
| 基金项目: |
| Author Name | Affiliation | | ZHANG Jialin (张佳琳)* ** *** | ( * School of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China)
( ** Key Laboratory of Geological Disaster Prediction and Early Warning and Ecological Protection and Restoration of Plateau Mountain,
Ministry of Natural Resources, Kunming 650093, P. R. China)
( *** Yunnan Key Laboratory of Geological Disaster Prediction and Warning and Ecological Protection and Restoration of Plateau and
Mountain, Kunming 650093, P. R. China)
( **** School of Geographical Sciences, East China Normal University, Shanghai 200241, P. R. China)
( ***** Institute of Soil and Water Conservation, Ministry of Water Resources, Chinese Academy of Sciences, Yangling 712100, P. R. China) | | ZHAO Zhongqiang
* ** *** | | | XIA Dinghong
* ** *** | | | LI Zhenyang
* ** *** | | | ZENG Liyuan
* ** *** | | | HE Hongming
**** ***** | | | SONG Yinxian
* ** *** | | | CHEN Zhong
* ** *** | |
|
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| 中文摘要: |
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| 英文摘要: |
| The major, trace, and rare earth elements of the Duanjiapo(DJP) section in the south of the
Loess Plateau, the Jiaxian(JX) section in the north, and the Jiuzhoutai( JZT) section in the west
are studied. The results show that the main elemental characteristics of loess in three profiles are
consistent with the upper continental crust (UCC). In terms of trace elements, Th, Nb, Zr, Hf,
Y, Cs, W, Cr, V, Li, and Pb show relative enrichment compared with UCC; Rb, Ba, Sr and Be
exhibit relative depletion. The average of ΣREE is 171. 91ppm with a negative anomaly for δEu and
essentially no anomaly for δCe. The results of K2O/ Na2O, Rb / Sr ratios, as well as the leaching co-
efficient from three profiles, indicate DJP > JX > JZT, suggesting that DJP experiences the strongest
weathering leaching effect. The chemical index of alteration (CIA) reveals that all three profiles of
loess are in the primary stage of Ca and Na depletion. DJP is generally in the early to moderate stage
of chemical weathering, while JX and JZT are both in the early stage. |
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