Based on Sentinel-2 satellite data, this study conducted remote sensing inversion of chemical elements in Laguocuo Salt Lake, Xizang, in order to reveal the spatial distribution characteristics of lithium, potassium and other elements in the salt lake. Firstly, radiometric correction, atmospheric correction and geometric precision correction of the remote sensing images were carried out to ensure the high quality and reliability of the data. By combining the ground sampling data, the element inversion model is constructed by CART algorithm. The results show that the concentration of lithium in Laguocuo Salt Lake is high, especially in the central area of the lake, the concentration of lithium is significantly higher than other areas; while potassium, sodium and other elements in the salt lake showed a more uniform distribution. In addition, through the correlation analysis of the elements, it is found that there is a strong positive correlation between the concentrations of lithium and potassium and sodium, which indicates that these elements may have a common enrichment mechanism during the evaporation and concentration process of the salt lake. The research also shows that Laguocuo Salt Lake has a high development potential for lithium resources, and is one of the important areas for lithium resources exploration in salt lakes on the Qinghai-Xizang Plateau. Through remote sensing inversion technology, this study provides a scientific basis for resource assessment and sustainable management of Laguocuo Salt Lake, and provides a new technical idea for resource exploration of similar salt lakes.
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