Essays on Placer

Gold is one of the most precious elements that exist in nature. The chemical symbol of gold is Au, derived from the Latin word ‘Aurum’. The atomic number gold is 79 and its atomic weight is 196.967 . The physical properties refer to the characteristics possessed by gold in its elemental form. The list of physical properties includes color, odor, hardness, boiling point, melting point, luster, density and many others. Gold is bright yellow in color and has a shiny and lustrous glow. The metal is softer in nature; however, it hardens after alloying with silver, copper and other metals. The ...

I/We have been assigned one of the most expensive metals, Platinum. It has widely application in dental implants, automotive catalytic converters (Rao & Reddi, 2000), biomedical implants such as catheters, stents, cardiac implants (Cowley & Woodward, 2011), manufacturing of optical glass, manufacturing of fuel cells (McDonald & Hunt, 1982) and jewelry.

Platinum ore deposits

Platinum ore contains palladium, iridium, rhodium, osmium and ruthenium, along with platinum. Platinum ore forms a) Placer deposits: Placer deposits are formed by water-based erosion of sedimentary rocks containing the ore (Example. Ural-Alaskan type). b) Layered igneous lode deposits: Such deposits are emplaced on stable cratons. Examples: South Africa as the Bushveld Complex, ...

Gold (chemical symbol Au and atomic number 79) is a shiny, dense, soft, ductile and malleable metal. In its pure state, gold is bright yellow in color with a luster considered traditionally and to date as attractive. It is an element of group 11of the periodic table under the transitional metals. Gold is among the least reactive chemical elements and does not oxidize in water or air. It therefore occurs as a free element in most cases in forms of grains or nuggets in rocks, in alluvial deposits, and in veins. Gold also occurs, though rarely, as gold compound e.g. with tellurium. ...