Figure 2 – Illustrates the PFA workflow (Adapted from Faulds, 2017) Table 3 – Factors and weights of the permeability and potentiality model for geothermal exploration (Adapted from Faulds, 2017). Category Subcategory Factor Value Weig ht (w) 1. Local Permeability Structural Configuration Accommodation zone / Relay (Step-over) 1.0 x2.0 Intermediate step / Fault intersection 0.6 / 0.5 x2.0 Fault termination 0.1 x2.0 No structural configuration -0.5 x2.0 Recency of Faults (Quaternary Age) Holocene (<15 ka) 1.0 x3.0 Late Pleistocene (<130 ka) 0.9 x3.0 Middle Pleistocene (<750 ka) 0.5 x3.0 Early Pleistocene (<2.6 Ma) 0.1 x3.0 Slip Rate (Trend) High (>1.0 mm/a) 1.0 x0.3 Moderate (>0.5 mm/a) 0.5 x0.3 Low / No data 0.0 x0.3 Rate/Permeability Relationship ≥ 0.40 mm/a 1.00 x1.5 (Detailed breakdown) 0.05 – 0.30 mm/a 0.30 – 0.80 x1.5 < 0.05 mm/a 0.05 – 0.10 x1.5 132
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