Before running a shovel in the ground, it is important to know where gold is found, how to extract it

Gold reserves in the hills of Sonbhadra in UP! On 22 February 2020, news came out that there was a huge amount of gold found in Sonbhadra. Earlier the news of this quantity being 3350 tons came out. If we talk about the current gold reserve of India, then it is 626 tons. Accordingly, this amount was five times our current gold reserve. It was later discovered that this figure is incorrect. The Geological Survey of India i.e. GSI clarified that there is nothing like this. Only 160 kg of gold can be extracted from that place. And this is not a discovery. We came to know this only in the exploration that went on between 1998 and 2000.

This is a press release issued by GSI. Notice Ore is highlighted. Ore means ore. (Source - GSI)
This is a press release issued by GSI. Notice Ore is highlighted. Ore means ore. (Source – GSI)

In this article we will understand how to find gold and how gold is extracted from thereafter it is detected.

Geology 101

It is not that the rock of gold directly came out while digging the mountains. First of all, we have to understand the basic terminology of Geology. Nothing is to understand the difference between rock, ore, mineral, and metal.

  • Mineral – Inorganic cheese with a fixed chemical texture is called Mineral. Iron, gold, copper, coal, salt are all these minerals.

But we do not get most of the minerals of our work. Naturally consisting of many minerals one Rock Are present as

There are many minerals in this world. These are just some of our work. Therefore our work has a different term for mineralized rocks. The rocks from which our work minerals can be extracted, Ore it is said.

  • Metal- What is it? Metals mean some special types of minerals. Usually hard, shiny and with lightning and fire. Such as gold, iron, and copper are metals, while coal and salt are not.

Every metal is a mineral. But not every mineral is a metal.

So let’s say everything in one line – there are lots of minerals in the rock. Those rocks are called ores from which minerals of our work can be extracted. Some special types of minerals fall into the metal category.

This is gold ore. Another good thing about gold is that it stays alone. Without forming any bond. So it is easy to remove it. (Source - Wikimedia)
This is gold ore. Another good thing about gold is that it stays alone. Without forming any bond. So it is easy to remove it. (Source – Wikimedia)

Estimate how rare a gold-like metal is – the amount of gold in the gold ore discovered in Sonbhadra is 3.03 grams per ton. This means that to extract 160 kg of gold, about 53,000 tonnes of rock have to be dugout. It is very close to Khoda Pahar and the exited Chuhiya According to the World Gold Council, the mines from which 8-10 grams of gold/ton are released are of good quality.

There are two important stages of extracting gold. Gold ore has to be identified first, then gold has to be separated from that ore. Its entire process takes a lot of time.

Search for gold

The prospecting of gold extraction begins. Prospecting means identifying potential gold sites and testing the rocks there. The test is to find out whether this ore will be able to extract a profitable amount of gold? This means that the amount of gold that comes out after doing everything should be worth more than the investment.

Mining organizations assess the geology of each region. That is, they know what is in the rocks. Gold is usually found where other metals such as silver and copper are present. Samples of rocks from potential gold sites are tested in the lab.

The ore body is modeled after studying small pieces in the lab. Many times the help of complex computer programs is also taken in this. The computerized model gives an idea of ​​the size and shape of the ore body. Also, it also shows what would be the best way to extract that ore.

gold-digging

Where gold is present within a little bit of the surface, there are small pits. They fill in the dynamite and dig it with explosions. These small pieces of rock are filled in a truck and sent to extract gold.

The gold mine is dug layer by layer. So we see those strips separately. (Source - Reuters)
A gold mine is dug layer by layer, so we see those strips separately. (Source – Reuters)

Underground mining takes place where gold is far below the surface. It consists of a copulated system of lift and shaft. Darker vertical columns are dug. Horizontal caves are made in those columns. Then go inside those caves and bang there and gather pieces of rock.

However, the pieces of these rocks are filled in trucks and sent to a mill. The work of extracting gold from these rock pieces begins in the mill.

cleanliness

Sawdust of these pieces is made in the mill. Then slurry is prepared by adding water to the shred. Leaching is the most popular method of extracting gold from this slurry. Gold is separated by adding cyanide and oxygen to the slurry. This is leaching.

Due to the use of cyanide in leaching, this process also removes poisonous waste. (Source - Wikimedia)
Due to the use of cyanide in leaching, this process also removes poisonous waste. (Source – Wikimedia)

After this, after going through many more stages of purification, the gold is melted and its blocks are prepared. These blocks are then sent for further refining. After that, gold reaches the market.

Only 10% of the gold deposits available in the world are such that there is a removable amount of gold. Most of the world’s gold is at the bottom of the sea. But at the moment we have no cheap and easy way to extract that gold.

 

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