So does this mean that the gold and its accompanying sulfides were introduced at the time of ductile shearing? Maybe… Found it! Hiding in the pyrite, just next to those magnetite-quartz veins The gold ...
often brecciated and intruded by quartz veins containing 3-20% pyrite-pyrrhotite with trace sphalerite and chalcopyrite. The second vein style is quartz veins injected into chloritized gabbro or ...