The iron minerals that are at present used as ores are hematite, magnetite, limonite, and siderite; also, occasionally ankerite, goethite, and turgite. Hematite is the

Copper Copper ores are found in a great variety of formations. Native copper occurs in trap, particularly the amygdaloidal variety; it is deposited in the

Where to Explore for Mercury Minerals The principal ore of mercury is cinnabar, HgS, known by its bright red color (vermilion-red when powdered), its great weight,

Silver The silver production of Canada has been mostly from two classes of deposits: those of the Cobalt district where the silver is largely native

Placer Gold Placer deposits of gold are formed by the concentration of the gold from the debris of gold veins and other deposits of gold

The complete study of faulting belongs to mining rather than to prospecting. But there are surface results of importance to the prospector. As explained, faulting is

Mechanical Deposition of Sedimentary Mineral Deposits In some cases, the ore mineral, on account of its resistance to weathering and its hardness, survived the destruction of many

An ore is defined as a mineral or rock from which some valuable constituent, usually a metal, can be profitably extracted. Thus hematite and magnetite