Shahrood University of Technology Journal of Mining and Environment 2251-8592 17 1 2026 01 01 Application of Fractal models for Determining Distribution Pattern of REEs and Lithium in North Kochakali Coal Deposit, Tabas 351 372 3334 10.22044/jme.2024.15323.2938 EN Mojtaba Bazargani Golshan Department of Earth Sciences., Science and Research Branch, Islamic Azad University, Tehran, Iran Mehran Arian Department of Earth Sciences., Science and Research Branch, Islamic Azad University, Tehran, Iran Peyman Afzal Department of Petroleum and Mining Engineering., South Tehran Branch, Islamic Azad University, Tehran, Iran Lili Daneshvar Saein Department of Geology., Payame Noor University, PO Box: 19395-3697, Tehran, Iran Mohsen Aleali Department of Earth Sciences., Science and Research Branch, Islamic Azad University, Tehran, Iran Journal Article 2024 11 09 The purpose of this research is application of the Concentration-Number and Concentration-Area fractal models for determining the distribution pattern of REEs and lithium in mining area of the North Kochakali coal deposit. According to the Concentration-Area and Concentration-Number fractal graphs, four different geochemical groups were obtained for REEs and lithium in the mining area of North Kochakali coal deposit. The comparison of the threshold values and the models obtained based on the Concentration-Area and Concentration-Number fractal models indicate that the Concentration-Area Fractal model has performed better in determining different geochemical groups and separating anomalies from the background for REEs and lithium in North Kochakali coal deposit. Based on the fractal models in the mining area, the southeastern and western parts have the highest concentrations of REEs and the northeastern parts have the highest concentrations of lithium. These parts should be considered in mining operations due to their higher economic value. The locations of the REEs anomalies are consistent with the location of right-lateral faults with a normal component, since these faults are young and have operated after the formation of coal seams, so the mineralization of REEs in North Kochakali coal deposit is epigenetic. https://jme.shahroodut.ac.ir/article_3334_d3c849f7adff82b5805d54906409e92d.pdf