Figure 1 – Lag correlation (Corr(k)=corr(Productiont , Placedt-k)) as function of gold production and gold placement. Maximum correlation occurs at short lags (0–2 months), with gradual decay over longer lags. This confirms that recovery response is delayed but not instantaneous. The decay structure suggests a distributed recovery function rather than a single fixed delay. 2.2.2 Spatial and Geometric Characterization Figure 2 – Spatial Maps of weighted heap height (H weighted). The spatial distribution of weighted heap height reveals structured growth patterns, with clear zones of progressive elevation. These maps demonstrate structured heap growth and preferential discharge zones. 2.2.3 Metallurgical Interactions Efficiency analysis against a competition ratio indicator suggests that chemical interaction effects influence short and long-term recovery behavior. 3. RESULTS Linear regression with engineered features model was evaluated using time-based splits to preserve temporal causality. Spatial heat maps represent model-attributed production/recovery 0.50 0.60 0.70 0.80 0.90 1.00 0 2 4 6 8 10 12 Correlation Time
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