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What are the methods of mineral extraction from the mines?

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What are the methods of mineral extraction from the mines?

There are four main methods of mining: underground, surface, placer and in-situ. The type of mining method used depends on the kind of resource that is being targeted for extraction, the deposit’s location below or on the Earth’s surface and the capacity of each method to profitably extract the resource.

What are four ways to test the physical properties of minerals?

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  • METHODS USED TO IDENTIFYING. MINERALS.
  • CRYSTALS. One of the best ways to identify a mineral is by examining its crystal form (external shape).
  • CLEAVAGE AND FRACTURE.
  • COLOR.
  • The hardness of a mineral can be measured by its resistance to scratching or abrasion.
  • STREAK.
  • LUSTER.
  • SPECIFIC GRAVITY.

What are the 5 methods of mining?

There are five recognized types of surface mining, each with specific variations depending on the minerals being extracted. These include strip mining, open-pit mining, mountaintop removal, dredging and highwall mining.

How are the properties of a mineral determined?

These properties can include: color, streak, hardness, cleavage, specific gravity, crystal form, and others. Some minerals can be recognized by their color: azurite is always a deep blue and malachite is green.

How is a streak test used to identify a mineral?

A streak test is accomplished by rubbing the mineral on a porcelain plate, also known as a streak plate. The color of the streak left by the mineral is sometimes different from the color of the mineral itself. A streak test comes in handy when identifying minerals such as hematite.

What do geologists look for in a mineral?

Of all these, only a few hundred are considered common. To help with identification, geologists must look closely at the physical properties of a mineral. These properties can include: color, streak, hardness, cleavage, specific gravity, crystal form, and others.

How can you tell the color of a mineral?

The color of the streak left by the mineral is sometimes different from the color of the mineral itself. A streak test comes in handy when identifying minerals such as hematite. Hematite can be found in various colors from black to red, but it always leaves a red streak.