Why is metal ore formed on the South American platform in addition to coal, oil and natural gas?

The bowels of the South American lithospheric plate or platform are very rich in various minerals, metal ores such as non-ferrous, current and ferrous metals. This is especially true of the western edge of the plate, which borders the Pacific Plate. This is due to the mutual influence of the two, which collided and formed the longest land mountains in the world. After all, as you know, metals and minerals are formed as a result of volcanic eruptions, tectonic activity and ultra-high pressure of tectonic plates.