Extraterrestrial rocks and olivine nodule(d,e)

Ilmenite and magnetite in basalts and dolerites(a-d)

Unmineralized intermediate rocks(d)

Slightly mineralized granites(c)

Clastic-hosted copper ores(e)

Red bed copper-lead-zinc mineralization(b)

Chromite associations(d-e)

Sulphides within ultramafic rocks in ophiolites(b,c)

Magmatic nickel ores(b,d,f)

Supergene alteration (d,e)

Mississippi Valley-style lead-zinc deposits(a)