Abstract
The Dezak limestone area, located SW Iran, is a potential site for industrial survey project of Precipitated Calcium Carbonate (PCC). Economic geology studies and geochemical implications of the area involve a high-risk level given the high purity of the limestone and the amount of penalty elements in the deposit. Generally, considering the compositional properties of geochemical data and using multivariate methods for a total of 527 composite samples showed that the data can be classified into five classes based on geological characteristics. According to K-means analysis, the grades of CaCO3 and SiO2 were 96.066% and 1.4754% within the second zone, and 94.5914% and 2.3278% within the fifth zone, respectively. Therefore, these zones were recognized as the first and second highest priorities having in common 165 and 133 samples on the specific geological units of Kdl and Kdld, respectively. Geochemical classification confirmed the geological units and variations. The priorities may preferably change depending on the time, place, plant requirements, access position, and the concentration of MgO and SiO2. Results from the robust factor analysis indicated that CaCO3 enrichment was mainly associated with depletion of SiO2 and Fe2O3 as well as P2O5 and, to some extent, MgO. This indicates the suitability of the selected study area, as major penalties are in contrast to CaCO3 enrichment. Geological and geochemical studies suggest different types of crystallized limestone and micritic limestone as the best zones for extraction. Therefore, geological properties were verified using multivariate K-means and factor analysis in the Dezak area.
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Hajnajafi, G., Jafarirad, A., Afzal, P. et al. Geological interpretation using multivariate K-means and robust factor analysis in Dezak area, SW Iran. Environ Earth Sci 80, 40 (2021). https://doi.org/10.1007/s12665-020-09305-8
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DOI: https://doi.org/10.1007/s12665-020-09305-8