Mining

Molten ore refers to metal in a liquid state, typically resulting from heating raw ore material to high temperatures. This molten form allows for easier extraction and processing of the metal from the ore.

Yes, mica has very clear cleavage. It cleaves easily into thin, flexible sheets due to its layered crystal structure. This gives mica its characteristic shiny appearance and ability to be easily separated into thin layers.

People quarry to extract valuable minerals, rocks, or other resources from the earth for various purposes such as construction, landscaping, and manufacturing. Quarries are often operated to obtain materials like limestone, granite, or marble that are used in the production of buildings, roads, and other infrastructure projects.

The mineral pyrite has a brassy yellow color in its original form but a black or greenish-black color in its powdered form due to oxidation.

Miners use a pickaxe, a tool with a pointed end for breaking up rock or ore and a chisel end for cutting through softer materials. The pickaxe is an essential tool for extracting minerals and ores from the earth in mining operations.

The ice erodes the land surface and carries the broken rocks and soil debris far from their original places, resulting in some interesting glacail landforms. There are 2 main processes of erosion, plucking and abrasion. Plucking is where water melts under the glacier and carries rocks and other particles away. Abrasion is where rocks rub against surfaces changing the landform. For more info go to study.com/academy/lesson/glacial-erosion-definition-processes-features.html

Advantages to the mining industry in general are that it can add jobs and money to the nearby economy. Some disadvantages are that the work is dangerous, and it is depleting the earthâ??s natural resources.

The true mill-head grade of an ore-stream in percent, ounces, or parts per million of a metal or mineral, less extractive metallurgical losses; the proportion of an ore material actually recovered.

Nickel is a hard, silvery white metal. It is produced by mining and refining sulphide and oxide ores. Nickel is also recycled from scrap metal The bulk of the nickel mined comes from two types of ore deposits. The first are laterites where the principal ore minerals are nickeliferous limonite

Yes, the Comstock Lode in Nevada's Carson River valley was one of the world's richest silver veins, discovered in the 1850s. It led to a silver rush and the development of towns like Virginia City. The mining activities in this region contributed significantly to Nevada's economy and played a role in its statehood.

Lignite is a form of soft, brownish-colored coal that is often referred to as brown coal. It is one of the lower-ranked types of coal in terms of carbon content and energy output.

To obtain 70.0 g of gold, you would need to dig up 250.0 g of sylvanite. This is because sylvanite contains 28.0% gold by mass, so to calculate the amount of sylvanite needed, you divide the mass of gold needed by the percentage of gold in sylvanite.

The dissolved materials in caves are carried away by water flowing through the cave system. These materials can be deposited outside the cave as mineral deposits or flushed out into surface water bodies.

Pyrite crystals typically form in the shape of cubes or pyritohedrons, which are 12-sided geometric shapes with pentagon and hexagon faces. These crystals can also show striations and faces with a metallic luster.

An open hole log , is just what it says, a log, (electric, caliper, nuclear) run in an open borehole with no lining material. A cased log is run in a borehole with steel casing. The steel casing limits the amount of information you can get from the logs.

Coquina forms when shells, mineral calcite, and sometimes phosphate settle on the bottom of the ocean, while more and more pile upon them as time passes. Soon, as more pressure builds up, all the shells, mineral calcite, and phosphate press together to create a hard structure in the form of a rock called coquina.

An adit.

In North America, the horizontal or sloped entrance to a mine is called a "Portal".

Portal more specifically refers to the portion of the shaft visible from the outside of the mine.

In some areas, the Portal portion of a horizontal shaft is called the "Drift Mouth" or "Drift Portal" as this shaft leads into a "Drift Mine".

With a vertical shaft, that portion would be called a "Collar".

To obtain 93 g of gold from sylvanite containing 28% gold by mass, you would need to dig up 93 g / 0.28 = 332.1 g of sylvanite.

The three method generally used to extract metals from ores are dependent on their reactivity. The first method is electrolysis, which is used for metals like aluminum and magnesium that have a high reactivity. The second is extraction by reaction with either carbon or carbon monoxide, which is used for less reactive metals like iron, lead and zinc. The third and final method is the use of hydrogen and this method is used for unreactive metals like gold, silver and copper. The third method is used in a variety of ways as many of these metals don't need to be separated from their ores but chemical reactions may be required to remove other contaminant materials.

Nickel can be separated from materials it is found with through a process called leaching, where the ore is treated with chemicals to dissolve the nickel. The resulting nickel solution can then be purified through processes like solvent extraction or precipitation to isolate the nickel metal.

'''Extraction Process''' The principle ore of aluminum is bauxite, a reddish clay-like ore rich in alumina is usually mined by open cut technique. Aluminium is then extracted by electrolysis at a reduction plant, or smelter. The ore is first converted into pure alumina by the Bayer Process which involves heating in caustic soda. The aluminum trihydrate dissolves leaving a residue of insoluble iron and titanium oxides called red mud. The aluminum trihydrate is dried to produce alumina which is electrolysed in molten cryolite because the aluminum oxide has too high a melting point to electrolyse on its own. Then a powerful electric current is run through the liquid to separate the aluminum from the oxygen. As a result, the molten aluminum sinks to the bottom of the pots.

Mining coal involves extracting it from the ground through processes such as drilling, cutting, and blasting. This is considered a physical change because the coal itself is not altered at a molecular level during the mining process—it is simply being removed from its original location.

It is not known when it was created, but it was first invented in the 13th century CE when Iron and charcoal were combined correctly.

"The earliest known production of steel is a piece of ironware excavated from an archaeological site in Anatolia (Kaman-Kalehoyuk) and is about 4,000 years old"

"Other ancient steel comes from East Africa, dating back to 1400 BC."

Source: Wikipedia.

links:

http://en.wikipedia.org/wiki/Timeline_of_materials_technology

http://en.wikipedia.org/wiki/Steel

Iron ore is the most commonly mined metal ore in the world. It is a key ingredient in the production of steel, which is used in various industries such as construction, automotive, and manufacturing. Australia, Brazil, and China are among the top producers of iron ore globally.