TITLE:
Innovative Study on the Occurrence of Iron in the Dam of a Mine in Brazil: Contributions to the Circular Economy
AUTHORS:
Eduardo da Rosa Aquino, Vidal Félix Navarro Torres, Romulo Ferraz, Carlos Dalmiro, Ana Sampaio, Carlos Arroyo
KEYWORDS:
Tailings Dam, Geological Model, Ordinary Kriging, Iron Grade
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.13 No.11,
November
13,
2025
ABSTRACT: A geostatistical study was conducted with the objective of developing a better understanding of the sediments deposited in the tailings dam of an iron mine located in Brazil. The samples, derived from two drilling campaigns conducted in 2001 and 2010, were statistically evaluated and validated for the construction of both a 3D geological model and an estimated model. The geological body modeling process was performed using an implicit method, which was based on the interpretation and adjustments of vertical sections and considered the positions of the samples and the grades of the chemical components of interest. In addition, the primitive topography was also considered to determine the base and limits of the deposit, as well as the current topography. The ordinary kriging (OK) method was chosen to estimate the grades of the chemical components and the retained/passing percentages of the particle size fractions described in the samples. The kriging model was validated through two analyses: mean comparison and drift analyses. The total tonnage of the estimated model was 287.14 Mt, with an average Fe grade of 63.89%.