Geology

This is where I’d hand you a hand lens and point at the hillside. The Geology section explains Colombia gold belt geology and the copper systems that sit alongside it: what the rocks are doing, why metal collects where it does, and what explorers mean when they talk about deposit types.

What we cover

• The gold and copper belts running through the Andes of Colombia, including the Middle Cauca belt.
• Porphyry deposits: large, lower-grade systems of copper and gold around ancient intrusions.
• Epithermal veins: the narrower, often higher-grade veins formed closer to the surface.
• Alluvial gold: metal weathered out of the hills and concentrated in the river gravels.

Why geology matters to investors

The type of deposit shapes almost everything that follows: how it’s drilled, how it’s mined, how much it costs and how long it takes. Knowing the difference between a porphyry and a vein system helps you read Colombian gold stocks and copper stocks with a clearer eye, and to see why two discoveries in the same belt can look nothing alike. We explain the concepts plainly, without promising what any property holds.

See where these systems surface in Regions, learn the vocabulary in Colombian Mining 101, read about the biggest finds in Modern Exploration, and find the companies exploring them on the company tracker.