Continental-scale distribution and source identification of fluorine geochemical provinces in drainage catchment sediment and alluvial soil of China
Journal of Geochemical Exploration(2020)
Abstract
Endemic fluorosis is a worldwide health concern, which may be related to enhanced fluorine (F) in soil via food-to-mouth or respiratory system activity exposure to humans. Until now, continental scale data on F in the pedosphere is still deficient in China. In this paper, the distribution of enhanced F and the factors influencing this distribution are investigated using data of the China Geochemical Baseline project. The median values of F were 488 and 456 ppm in top and deep soil, respectively. In terms of spatial distribution, F in topsoil of China presents coastal and mountain low-value zones, central-south plain and southwest Karst high-value zones, and a northwest arid basin high-value zone. Thirty-three F geochemical provinces were delineated with F values of >700 ppm, which were predominately associated with geological background, intensive evaporation, and human activities. The formation of a high F anomaly area from the central–southern part to the southwestern part of China was related to the calcium-enriched soil and the superimposed coupling of multiple factors including the high F geological background, such as F-enriched organic matter strata, F-enriched phosphorus-bearing strata, F-enriched gypsum salt strata and mineralization processes. The high F anomaly area in northwestern China was not only related to the high geological background, but also associated with the secondary enrichment caused by evaporation.
MoreTranslated text
Key words
Source identification,Geochemical provinces,Fluorine,Soil and sediment,Continental scale,China
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined