Mining

Low tox drilling mud is water based.

Kerala, Orissa

Galena's streak is gray, hematite's streak is deep maroon/brown.

After you put the honey on the tree, it'll take about six hours for a Pokemon to appear, but it might not be Cherubi.

Today all the uranium mines in Colorado are closed.

1. gold 19.30
2. pyrite 4.95 to 5.10

This depends on the type of pyrite and its intended use. Pyrite is a potential ore for Iron containing close to 50 % of this metal (rest is sulphur and trace metals).

As stainless steel is worth arount 3000 $/tonne (as of June 2012) and there is a lot of work going into mining, refining, waste treatment and transporting raw materials to produce steel, the price for pyrite ore is relatively low and depends a lot on the ore grade (how much stuff apart from pyrite is there in the rock and can one actually use it for something or is it just waste).

Apart from its industrial use, pyrite is well liked by mineral collectors for its beautiful crystal structure and golden metallic appearence. Especially nicely formed idiomorphic pyrite crystals or crystal clusters can be worth several hundred dollars per kg, depending on how much people are willing to pay, of course.

Apart from its economic value pyrite has a lot of scientific values as it gives geologists clues about Earth's past:

-Geologists have found sedimentary pyrites in sedimentary rocks that are more than 3 billion years old which gives them good indication that back then there was practically no oxygen in the atmosphere. If there had been oxygen, all the pyrite would have been oxidized to rusty iron oxides.

-A special type of pyrite (very small pyrite aggregates called framboids) forms in anoxic water (water that lacks dissolved oxygen which is essential for higher animals). The occurence and the size of these framboids in specific sedimentary environments has been taken as evidence that several times in Earth's past large areas of the oceans lacked oxygen.

-Geochemists measured the isotopic composition of certain pyrites to find out if the sulphur in there crystal lattice was derived from bacterial reduction processes (this fractionates sulphur isotopes a lot). Finding pyrites with this "life signature" can tell scientists about the evolution of life and where it might exist.

Fools gold (iron pyrite) is relatively heavy, it is about one fourth to one third as heavy as gold and about as heavy as iron.

because there was a weakness in the structure of the cooper tunnel entrance

In some cases it will cost more to mine and refine the mineral than that mineral is worth. This can occur if the concentration of the mineral is too low, or if it is buried too deep to be accessed cost-effectively. In this case, the mineral resource is techincally not an ore, as by definition, an ore is a mineral resource that can be extracted at a profit.

A miner is a person whose work or business it is to extract ore or minerals from the earth. It is considered one of the most dangerous trades in the world. In the backward countries miners often do not have social guarantees and in case of destruction or mutilations they are left to the mercy of fate. http://en.wikipedia.org/wiki/Miner

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The most common titanium ores are rutile and ilmenite. Though there are many more.

Galena is a mineral, lead suphide (PbS), and as such, it is in the group of sulfide minerals. Links can be found below to check facts and learn more.

A symons cone crusher is an upgrade from a spring cone crusher.

Methane found in coal mines is typically referred to as coal mine methane (CMM). It is a byproduct of coal production and can be a safety hazard due to its flammability and potential for explosions. CMM can also be captured and utilized as a valuable energy source.

This depends upon the type of mine and who manages it. There is no restriction on young children entering mines owned personally. Many, but not all, companies that conduct tours underground will set an age limit.

The geologist could see that the metamorphic rock was non foliated as it did not contain aligned minerals in bands.

its mined by coal im 99.9% sure

Yes. One of Poland's most famous tourist attractions is the Salt Mines, near Krakow in Poland.

Many gold prospectors mined by placing a pie pan shaped dish in a stream and gathering some of the sand and a little water. Then they would slowly swirl the dish letting the water fall out. If they found gold, they staked a claim and built a mine by cutting into nearby rocks, digging caves to find more gold.

The Kimberly mines are in central South Africa.

iron pyrite is also called fools gold

yes

Only mineable underground reserves are extractable.