Metallic minerals means a group of minerals comprising of gold, silver, copper, iron, nickel, cobalt, tin, tungsten, zinc, chromium, manganese, titanium, aluminium, platinum group of metals and other metallic minerals.
Metallic minerals are further divided into ferrous and non-ferrous metallic minerals. Ferrous, as you know, refers to iron. All those minerals which have iron content are ferrous such as iron ore itself and those which do not have iron content are non-ferrous such as copper, bauxite, etc.
The metallic minerals found in Tanzania include gold, iron, silver, copper, platinum, nickel, and tin. are the sources of metals. Iron ore, copper, gold produce metal and are included in this category.