Abstract
The operation of large-scale ore-forming processes triggers the development of neighboring mineral deposits of the same or related types in a metallogenic province. While these deposits often bear striking similarities, variations in local geological settings cause differences in many deposit features. Therefore, in a metallogenic province, geochemical, geophysical, and geological signatures of local areas mineralized with a certain deposit type can show considerable inherent differences. The application of deposit-type locations as training sites, thus, introduces a type of stochastic uncertainty into data-driven mineral prospectivity mapping (MPM), impairing the predictive capability of this activity. This study delves into this type of uncertainty and applies an ensemble technique combining bootstrapping and naïve Bayes classifiers to measure this uncertainty and lessen its impact on the MPM-generated exploration targets. Two components, one representing the quantified uncertainty and the other a modulated predictive model, are retained by the proposed framework. This framework was applied to a suite of mineral-systems derived targeting criteria of skarn-type Cu mineralization in the Alborz–Azerbaijan magmatic belt of northern Iran. The predictive results derived by the proposed technique outperformed those derived using a single classifier, showcasing its efficacy. In addition, a novel approach is described and applied to demarcating exploration targets marked by low uncertainty.
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Special thanks are due to Prof. Renguang Zuo for handling this manuscript and to two anonymous reviewers for their critical comments on an earlier version of this work.
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Parsa, M., Carranza, E.J.M. Modulating the Impacts of Stochastic Uncertainties Linked to Deposit Locations in Data-Driven Predictive Mapping of Mineral Prospectivity. Nat Resour Res 30, 3081–3097 (2021). https://doi.org/10.1007/s11053-021-09891-9
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DOI: https://doi.org/10.1007/s11053-021-09891-9