A comparative study of concentration-area (C-A) and spectrum-area (S-A) fractal models for separating geochemical anomalies in Shorabhaji region, NW Iran

摘要

Delineating the geochemical anomalies from background is a fundamental task in geochemical exploration. Fractal models are practical for the purpose especially concentration-area (C-A) and spectrum-area (S-A) fractal models. The aim of this study is a comparative study of C-A and S-A fractal models for separating regional geochemical anomalies based on 107 stream sediment samples taken from the Shorabhaji region, NW Iran. Results derived via the fractal modeling indicated that the C-A and S-A models are capable of separating anomaly from background. There exists a good correlation between the suggested anomalous area by both of them and the geological particulars in the Shorabhaji area. The advantage of the C-A model is its simplicity and easy computational implementation. The S-A model can decompose better a mixed pattern into a varied geochemical background and anomalies. As a result, the S-A model is a powerful tool for separating of geochemical anomalies from background especially in the complex mixed patterns.