The Gold Systems Where the Intrusion Does the Work
Most gold deposits force a tradeoff. An explorer can have grade or tonnage, simple metallurgy or scale, but rarely all of it in one orebody. The exception is a deposit class geologists call the intrusion-related gold system, where a cooling body of magma drives gold-bearing fluids outward along the same fractures that emplaced the intrusion. The result is a distinctive architecture: broad, continuous envelopes of disseminated gold wrapped around higher-grade feeder structures, often oxidized and free-milling near surface. In a market that rewards ounces which are cheap to find, cheap to ...