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Mining

Mining for coal is something that is widely known, but did you know that diamonds, uranium, copper, and other non-renewable natural resources are also mined? There are two types of mining; surface and subsurface. Questions about the methods and types of mining, what ores are mined, and related questions should be asked in this category.

4,677 Questions

What is a clast?

A clast is a fragment of rock or mineral that is produced by the weathering and erosion of larger rocks. Clasts can vary in size, shape, and composition depending on the parent material from which they originated. They are commonly found in sedimentary rocks.

Which pair of minerals is most likely to be found in felsic rock?

Quartz and feldspar are the most likely pair of minerals found in felsic rock. Felsic rocks are rich in silica, which forms minerals like quartz, and feldspar is another common mineral found in these rocks.

How is gold different from pyrite and mica?

Gold is a precious metal with a distinct yellow color and is very malleable and ductile. Pyrite, also known as "fool's gold," is a brassy yellow mineral with a metallic luster and a different chemical composition from gold. Mica is a silicate mineral that forms in thin, sheet-like layers and is commonly shiny and flaky in appearance, with no metallic properties like gold and pyrite.

What is the hardness of pumice on moh's scale?

Pumice has a hardness of about 6 on the Mohs scale of mineral hardness.

How is oil extracted from the earth?

Oil is extracted from the ground by drilling down hundreds of feet into the earth. Once a discovery is located, a pipe is inserted through which the oil ascends to ground level and is captured into containment areas

What are the different methods of mining?

Here are two of the main categories of mining:

Underground Mining - Underground modes of access include drift, slope, and shaft mining, and actual mining methods include longwall and room and pillar mining. Drift mines enter horizontally into the side of a hill and mine the coal within the hill. Slope mines usually begin in a valley bottom, and a tunnel slopes down to the coal to be mined. Shaft mines are the deepest mines; a vertical shaft with an elevator is made from the surface down to the coal.

Surface Mining - Surface-mining methods include area, contour, mountaintop removal, and auger mining. Area mines are surface mines that remove shallow coal over a broad area where the land is fairly flat. Huge dragline shovels commonly remove rocks overlying the coal (called overburden).

How much oil has been pumped from the earth?

Around 1.2 trillion barrels of oil have been pumped from the earth since the beginning of the oil industry in the mid-19th century. It is estimated that we have consumed approximately two-thirds of the world's total oil reserves.

Which rock has more silica in it likely to be lighter or darker than a rock with less silica in it?

A rock with more silica is likely to be lighter in color, such as light gray or white, due to the presence of minerals like quartz. In contrast, a rock with less silica tends to be darker, as it is typically composed of minerals like mafic minerals (e.g., biotite, amphibole) that give it a darker hue.

What is the shape of minerals?

Minerals can have various shapes depending on their crystal structure. Common mineral shapes include cubic, hexagonal, prismatic, and rhombic forms. These shapes are determined by the internal arrangement of atoms within the mineral.

How does slate weather?

Slate is a type of metamorphic rock that does not have the ability to change or adapt to weather conditions. It is a durable material often used in roofing or as a writing surface due to its resistance to weathering.

What are advantages of mining?

Some advantages of mining include job creation, economic development in local communities, and access to valuable natural resources that are essential for various industries. Mining can also contribute to infrastructure development and technological advancements.

Specific gravity of iron ore?

The specific gravity of iron ore typically ranges from 4.5 to 5.3, depending on the specific type of iron ore. It is a measure of how dense the ore is compared to water, with higher values indicating greater density. This property is important in the processing and transportation of iron ore.

Does the rock gabbro cool quickly or slowly?

Gabbro cools slowly because it forms beneath Earth's surface through the slow cooling and solidification of magma. This allows large mineral crystals to form, giving gabbro its characteristic coarse-grained texture.

What resources are extracted from the earth?

Some resources extracted from the earth include metals (such as copper, gold, and iron), fossil fuels (like coal, oil, and natural gas), minerals (such as salt and limestone), and precious stones (like diamonds and emeralds). These resources are used in various industries for manufacturing, energy production, construction, and technology.

What is a geoist?

A Geoist seeks to tax shift from taxing production - wages, sales, capital - to taxing the use and abuse of natural resources and the locational rent of land. The Land (classically defined as ALL natural resources of the world) is created by nature, not Man, and rightfully belongs to all of us, Geoists argue, and location and demand of rising populations give it its value, not anything private holders of Land do with it, so its value should be returned to the community that gave it its value. Productive activities should be simultaneously untaxed.

What are the 'four parts' of the earth?

I believe there are more.

  • Crust
  • Upper Mantle
  • Mantle
  • Outer core
  • Inner Core

How is Granodiorite formed?

Granodiorite is formed from the slow cooling of molten magma beneath the Earth's surface. It is a coarse-grained igneous rock that typically contains quartz, feldspar, and biotite or hornblende. The slow cooling allows for the growth of large crystals within the rock.

Where on earth are red earth minerals found?

Red Earth minerals are found in various regions around the world, including Australia, South Africa, parts of the United States, and Brazil. These minerals are typically formed from iron-rich rock weathering, which gives them their distinctive red color.

What could a person who searches for surface gold be called?

A person who searches for surface gold could be called a "prospector."

What rocks do you quarry?

Common rocks that are quarried include granite, marble, limestone, sandstone, and basalt. These rocks are used for various construction purposes, such as building materials, countertops, monuments, and decorative elements.

What is deep lead mining?

Deep lead mining refers to the extraction of lead ore from deep underground mines. This process involves digging shafts and tunnels to access the lead deposits found deep within the earth. Deep lead mining can be a dangerous and challenging endeavor due to the depth and complexity of the mines.

How is jade formed?

Jade is formed most commonly through metamorphism associated with subduction faulting along tectonic plate boundaries. A high pressure and low temperature metamorphic environment necessary to form jade.

Why would a coal company impose a 250 ft depth limit when mining?

A coal company might impose a 250 ft depth limit to ensure the safety of miners, prevent risks associated with deep mining such as rockfalls and gas build-up, and comply with environmental regulations relating to groundwater contamination or subsidence. This depth limit could also be set to minimize costs and optimize operational efficiency by focusing on more accessible and profitable coal seams.

What sediments form shale?

Shale forms from the compaction of mud or clay sediments, often in quiet water environments such as lakes or deep ocean basins. These sediments are typically rich in fine particles such as clay minerals and organic matter, which bond together to create the layered structure of shale.