Prospecting

Mining activities include prospecting and exploration for a mineral deposit through finding, developing, extracting and processing the ore. That is why it is possible to divide the mining activity into three major phases: 1) before mining which involves prospecting and exploration required to locate, characterize and prove a potential ore body; 2) mining which refers to actual coal or ore extraction; extraction processes include underground or surface mining and dredging; 3) after mining which involves processing and preparing the raw ore for the end product.

Before a mineral deposit can be worked, that is, before it can be extracted from the Earth for use by man, it must first be found. The search for economically useful mineral deposits is called prospecting. To establish the quality and quantity of a mineral deposit, the type of country rock, etc. means to prove it and this process is called proving. Prospecting and proving are only two different stages of mining geological exploration, the latter includes drilling and driving of openings.

Last century prospectors looked for visible evidence of mineralization on the surface of the Earth. To recognize valuable minerals it was necessary to know their various distinctive physical properties. For example, gold occurs in nature as a heavy malleable yellow metal. The first ores of iron to be mined were deposits of magnetite, a black heavy mineral capable of attracting a piece of iron. The aim of geological prospecting is to provide information on a preliminary estimation of the deposit and the costs of the geological investigations to be made. It also indicates whether it is available to continue the exploration or not.

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Вариант 2

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Date: 2015-11-14; view: 1811; Нарушение авторских прав