{
  "gold_region_system": {
    "resource_type": "gold_ore",
    "description": "Gold deposit regions with biome-compatible feature selection",

    "features": {
      "gold_lode": {
        "display_name": "Gold Lode",
        "compatible_biomes": ["hills", "rocky_plateau", "alpine"],
        "incompatible_biomes": ["wetlands", "coastal_plain"],
        "pattern": "concentrated",
        "probability": 0.25,
        "quality_base": "premium",
        "extraction_difficulty": "hard",
        "budget_impact": 5,
        "geological_requirements": ["hydrothermal_quartz_vein"]
      },

      "placer_gold": {
        "display_name": "Placer Gold",
        "compatible_biomes": ["temperate_forest", "grassland", "coastal_plain"],
        "incompatible_biomes": ["alpine", "rocky_plateau", "hot_desert"],
        "pattern": "clustered",
        "probability": 0.30,
        "quality_base": "premium",
        "extraction_difficulty": "easy",
        "budget_impact": 3,
        "geological_requirements": ["alluvial_gold_concentration"]
      },

      "epithermal_gold": {
        "display_name": "Epithermal Gold",
        "compatible_biomes": ["hills", "scrubland", "temperate_forest"],
        "incompatible_biomes": ["wetlands", "cold_desert"],
        "pattern": "ring",
        "probability": 0.20,
        "quality_base": "premium",
        "extraction_difficulty": "medium",
        "budget_impact": 4,
        "geological_requirements": ["epithermal_mineralization"]
      },

      "residual_gold": {
        "display_name": "Residual Gold",
        "compatible_biomes": ["hills", "scrubland", "grassland"],
        "incompatible_biomes": ["wetlands", "alpine"],
        "pattern": "gradient",
        "probability": 0.15,
        "quality_base": "premium",
        "extraction_difficulty": "very_easy",
        "budget_impact": 2,
        "geological_requirements": ["weathering_concentration"]
      },

      "conglomerate_gold": {
        "display_name": "Conglomerate Gold",
        "compatible_biomes": ["hills", "rocky_plateau"],
        "incompatible_biomes": ["wetlands", "coastal_plain", "tropical_rainforest"],
        "pattern": "uniform",
        "probability": 0.08,
        "quality_base": "premium",
        "extraction_difficulty": "very_hard",
        "budget_impact": 4,
        "geological_requirements": ["paleozoic_conglomerate"]
      },

      "sulfide_gold": {
        "display_name": "Sulfide Gold",
        "compatible_biomes": ["hills", "rocky_plateau", "alpine"],
        "incompatible_biomes": ["wetlands", "coastal_plain"],
        "pattern": "concentrated",
        "probability": 0.02,
        "quality_base": "standard",
        "extraction_difficulty": "very_hard",
        "budget_impact": 3,
        "geological_requirements": ["sulfide_mineralization"]
      }
    }
  }
}