Elemental geochemical characteristics and genetic mechanisms of Se-rich soils in the Lixiahe area in Jiangsu Province

LIAO Qi-Lin; HUANG Shun-Sheng; XU Wei-Wei; CUI Xiao-Dan; JIN Yang; LIU Ling; WANG Yuan-Yuan; LI Wen-Bo; ZHOU Qiang

doi:10.11720/wtyht.2024.1369

2024 Vol. 48, No. 4

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Article navigation > Geophysical and Geochemical Exploration > 2024 > 48(4): 1114-1124

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LIAO Qi-Lin, HUANG Shun-Sheng, XU Wei-Wei, CUI Xiao-Dan, JIN Yang, LIU Ling, WANG Yuan-Yuan, LI Wen-Bo, ZHOU Qiang. 2024. Elemental geochemical characteristics and genetic mechanisms of Se-rich soils in the Lixiahe area in Jiangsu Province. Geophysical and Geochemical Exploration, 48(4): 1114-1124. doi: 10.11720/wtyht.2024.1369

Citation:

LIAO Qi-Lin, HUANG Shun-Sheng, XU Wei-Wei, CUI Xiao-Dan, JIN Yang, LIU Ling, WANG Yuan-Yuan, LI Wen-Bo, ZHOU Qiang. 2024. Elemental geochemical characteristics and genetic mechanisms of Se-rich soils in the Lixiahe area in Jiangsu Province. Geophysical and Geochemical Exploration, 48(4): 1114-1124. doi: 10.11720/wtyht.2024.1369

Elemental geochemical characteristics and genetic mechanisms of Se-rich soils in the Lixiahe area in Jiangsu Province

1. Technology Innovation Center for Ecological Monitoring & Restoration Project on Land (Arable ), Ministry of Natural Resources, Nanjing 210018, China;
2. Geological Survey of Jiangsu Province, Nanjing 210018, China

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Corresponding author: HUANG Shun-Sheng

Received Date: 25 August 2024

Revised Date: 25 December 2023

Abstract

Abstract

Based on relevant eco-geochemical survey data collected fromthe Lixiahe plain area in Jiangsu Province, this study systematically explored the geochemical characteristics of elements in Se-rich soils and the genetic mechanism through elemental distribution contrast, correlation analysis, R-type cluster analysis, and principal component analysis. This study can be referenced for the rational production and utilization of Se-rich land resources of the Quaternary sedimentary type. Key findings are as follows: (1)Se-rich soilsin the Lixiahe area are typical Quaternary sediments, and the closed lagoon facies sedimentary environment characterized by rich organic matter and slightly reducing conditions plays a foundational role in the formation of local Se-rich soils; (2) Typical element association, Se-OM-N-K-Fe-Co, in Se-rich soils is primarily located within a depth of 30 cm from the surface, with Se content ranging mostly from 0.3×10^-6 to 0.4×10^-6 in a uniform distribution; (3) Significant positive correlations between Se and some other elements can be observed in the soils, with the correlation coefficients (r)between Se and OM, and Se and CEC being 0.74 and 0.66, respectively.In contrast, Se exhibits a significant negative correlation with pH, with a correlation coefficient of -0.35; (4) The formation of Se-rich soilsmight have experienced three Se enrichment stages: the initial enrichment in soil parent materials, the re-enrichment during soil formation, and the supergene enrichment after soil formation, accompanied by interference from non-lagoon facies sediments (such as marine sediments). Organic matter adsorption, colloid adsorption, and biogeochemistry constitute the main causes of Se enrichment in the soils; (5) The Se-rich soils are also relatively enriched in heavy metal elements like Cu, Pb, Zn, Ni, Co, and V, which are within the national limit standards.
- Se-rich soil /
- element /
- geochemical characteristics /
- geneticmechanism /
- Lixiahe area /
- Jiangsu Province

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References

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