
Mastering Supergene Gold – How to Read the Layers and Find the Enriched Zone
Supergene gold enrichment is one of the most powerful natural processes in gold geology. It takes low-grade gold zones and turns them into high-grade pay layers—if you know how to read the signs. In this long-form episode, we break down how supergene systems work, what the key weathering zones look like, and how you can use these clues in the field to find real gold.
Gold isn’t always in veins or quartz. In supergene systems, gold starts in sulfide minerals like pyrite. When exposed to air and rain, these sulfides oxidize and release sulfuric acid. That acid dissolves gold and sends it downward. But gold doesn’t just disappear—it drops out again when it hits the right chemistry, forming a concentrated enrichment blanket underground.
The key to supergene prospecting is understanding the vertical weathering profile. From top to bottom, there are three major zones:
• Oxidized Cap (Gossan): The surface layer, stained red or orange from iron oxides like hematite and limonite. This cap may hold residual gold, but more importantly, it signals deeper activity.
• Leached Zone: A pale, chalky layer stripped of metals. This zone looks barren, but it once held gold. Its presence proves that gold moved—and likely collected below.
• Enrichment Blanket: The prize. Dense, dark material that contains secondary gold deposits. This layer often forms just below the leached zone and can be only inches thick but incredibly rich.
In this video, we walk you through real examples, animated geology models, and field demonstrations. You’ll learn how to identify:
• Color changes in rock (from rust to white to black)
• Texture and density shifts between layers
• Subtle geochemical clues like manganese staining or clay zones
• Redox boundaries where gold drops out of solution
We also show you how to apply these principles using the Aurum Meum Deep Dig AI Gold Map, which highlights oxide zones, structural breaks, and historic production areas that indicate supergene behavior.
Supergene gold doesn’t always show itself at the surface—but it leaves a breadcrumb trail. When you understand how acid migration, host rock chemistry, and fluid pathways work together, you can predict where the gold will settle—even before you dig.
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