The Geology of Silver: Almost Always Someone Else's Byproduct
Most silver is a byproduct of lead, zinc, and copper mining, not a primary silver deposit, the same by-product dependency pattern cobalt shows.
Silver shares a structural geological fact with cobalt, covered on cobalt’s own geology page: most of it is mined as a byproduct of a different primary metal, not from a deposit developed for silver itself.
Epithermal veins and polymetallic deposits
Mexico and Peru’s dominance comes substantially from epithermal deposits, formed by hydrothermal fluids near the earth’s surface that deposit silver, gold, and base metals together in vein systems, a real, distinct geological setting from the porphyry deposits covered on copper’s geology page, though the two often occur in related volcanic-arc terrains.
Why silver’s byproduct status differs from cobalt’s
Unlike cobalt, where the by-product relationship is almost total, covered on cobalt’s geology page, silver has a meaningful minority of genuinely primary silver mines, where silver itself is the main economic driver, particularly in parts of Mexico and Peru. This gives silver a partial, not complete, exposure to the base-metal price dependency covered on this material’s economics page.
Sources: deposit-type framing and byproduct production shares draw on standard economic geology references (USGS Mineral Commodity Summaries); production figures reference the production data elsewhere on this site.