Look at text table 5-1. Metal vs. Non-metal metals are nonfuel mineral resources such as Fe, Al, Cu, Pb, Zn, etc. A more chemical definition indicates that metals form metallic bonds where electrons flow freely among the atoms making them generally good conductors of heat and electricity. Tailings the unwanted material found in an ore deposit, often left as waste at mine site. Recycling often possible, substitutes often exist, and extraction technologies improving, and crust basically made of minerals.
Major concerns are more with environmental liabilities of mining.
B. Igneous Ore Deposits - where layered mineral deposits form in assoc. Sometimes rich layers of nickel, copper, and iron form in this way. Also suspected source of diamonds from kimberlite pipes. C. Sedimentary Ore Deposits 1. Placers mechanically segregated dense ore minerals.