There are Metallic and Nonmetallic Minerals.
Mankind cannot continue mining the earth forever. The mineral resources which we are digging up are a nonrenewable, finite source. If more countries become wealthier throughout this century, it is likely that we will exhaust most of the currently economically viable deposits of minerals and fossil fuels, leading to countries searching for deeper deposits that today may not be economic to exploit. Eventually, the resources (for example, petroleum) may become so scarce that it is too expensive to use except for those situations where substitutes will not be as effective. Thus, we will not 'run out' of petroleum, because of economics, but we will use it less and less and thus be forced to search for substitutes for energy. It is crashingly obvious to all of us far-sighted environmentalists that this substitute is non-renewable, eco-friendly and does not involve plundering the earth to support an increasingly large population. For example, the energy future of many countries which today have embraced fossil fuels and never looked back may actually see the increasing use of solar energy, water energy, wind energy and hydrogen techonologies which are sustainable and do not necessitate environmental degradation. Right now, however, we must leave about 80% of fossil fuels that are in the ground untouched. We cannot afford to exploit them. The carbon budget first-world nations have decided to meet can only be met if we reduce greenhouse gas emissions (which come from fossil fuels) every year by at least 5%.
here i studied the minerals and there economic value
What an interesting course it is.
Entendido, excelente tema
para visualizar la importancia y la utilidad de los metales por lo que se convierten en atractivo económico, así como las alternativas de su comercialización y búsqueda en la corteza terrestre. Se ha analizado el por qué se denominan estratégicos y se ha encontrado que en los países desarrollados lo requieren con urgencia debido a la escasez con que se encuentran en la corteza terrestre y en sus territorios, así como la urgencia con la que la industria bélica y pacífica lo necesitan para continuar el avance tecnológico y económico de estos países.
Muy buena esta sección.
The reason why many countries are industrialized today is the value of minerals in mining sector.
South African economy depends on mining to larger because of Witwatersrand super group that brought mining boom in 1800s in gold sector.Today we pride ourselves with Bushveld complex that brought us platinum.
Worldwide, it is estimated that sand, gravel, limestone, clay, sulfur, salt, and phosphate make up 90% of the total tonnage of all industrial minerals and rocks produced and 60% of total value.
Most of the abundant minerals in the earth's crust are not of commercial value. Economically valuable minerals (metallic and nonmetallic) that provide the raw materials for industry tend to be rare and hard to find. Therefore, considerable effort and skill is necessary for finding where they occur and extracting them in sufficient quantities.
Minerals that are of economic value can be classified as metallic or nonmetallic.
Metallic minerals are those from which valuable metals (e.g. iron, copper) can be extracted for commercial use. Metals that are considered geochemically abundant occur at crustal abundances of 0.1% or more (e.g. iron, aluminum, manganese, magnesium, titanium). Metals that are considered geochemically scarce occur at crustal abundances of less than 0.1% (e.g. nickel, copper, zinc, platinum metals).
Some important metallic minerals are: hematite (a source of iron), bauxite (a source of aluminum), sphalerite (a source of zinc) and galena (a source of lead). Metallic minerals occasionally but rarely occur as a single element (e.g. native gold or copper).
Nonmetallic minerals are valuable, not for the metals they contain, but for their properties as chemical compounds. Because they are commonly used in industry, they are also often referred to as industrial minerals. They are classified according to their use.
Some industrial minerals are used as sources of important chemicals (e.g. halite for sodium chloride and borax for borates). Some are used for building materials (e.g. gypsum for plaster and kaolin for bricks). Others are used for making fertilizers (e.g. apatite for phosphate and sylvite for potassium). Still others are used as abrasives (e.g. diamond and corrundum).