or why Epicezmoica stops marketing
For some years now we have seen on our tables and our plates salt crystals of multiple colors and salt mills to accompany them. Pink, blue salts, ... Many of you came to me for information about these salts that were said to be better for you.
Only here, this madness of salt impoverishes once more the riches of our planet. Because until when? This salt that dates back thousands of years, how much longer can we extract before making it a material not found?
Come on, for the trouble, little recap:
The salt deposits were discovered in the days of the hunter-gatherers, but it was the Celts who were the first to harvest salt in the open, by evaporation. The precious sodium chloride not only enhanced the taste, but also preserved the food. Very abundant in nature, salt is usually extracted from the oceans, but it can also be found in the form of rock inside the earth: rock salt.
Rock salt is a rock from the family of saline rocks (or evaporites) formed by fossil sea salt that dates back to the secondary era when part of Europe was covered by the sea (between 200 and 60 million years ago). )
Formation of salt mines
During the geological time, gradually the salt layers of marine evaporites (first stage) were crushed by denser sediments (second stage). We can then witness during the geological time to a rise of salt by the cracks of the Earth's crust, the salt becoming plastic under certain pressures. This movement of a mineral, a solid hard and rigid yet, is a slow flow of salt. It is carried out, on a microscopic scale, by sliding of the planes containing the atoms, along the lines of dislocation of the crystal and one obtains the diapirs, which are very sought after by the tankers because they can determine reservoirs of hydrocarbons.
One method of extracting rock salt is to extract solid salt from quarrying or mining. It has been known to extract rock salt from the soil or subsoil for many years and even since prehistory. In some parts of the world the mining techniques used are still very old. The workers painfully slice up layers of salts up to 60 meters thick by means of picks and mining bars. The risks endured by minors are extremely dangerous, given the lack of security due to the lack of financial means of these developing countries, for example in Mali.
In modern mines, a well is accessed through a network of parallel and perpendicular galleries. The deposit is exploited according to the method known as "abandoned chambers and pillars" which consists in leaving in place, according to a pre-established scheme, salt pillars with calculated dimensions so that the overlying lands remain stable.
Persian blue salt
Mine excavated by primitive humans about 5000 years ago, this mine is still in use today and produces more than 500 tons of salt a year, used in cooking and for souvenirs ...
According to a survey from 1971 to 1979, there are still more than 1 billion tonnes of ore left in the mine, which is mined using machinery and underground blasting ...
Pink salt of the Himalayas
The Khewra Salt Mine is Pakistan's largest source of rock salt at the beginning of the 21st century, producing an average of more than 350,000 tons per year. It is located in Khewra in the Punjab of Pakistan.
Discovered by the troops of Alexander the Great in the fourth century BC J. - C., its commercial exploitation begins only with the Mughal Empire (1526 - 1857), several centuries later. From 1872, during the British occupation, several modifications were made in order to increase its production. It returns to the Pakistani government after the partition of India in 1947.
In 2012, Pakistan Mineral Development Corporation operates the mine, with proven mineable reserves of 82 million tonnes. This mine is also a major tourist destination, attracting more than 40,000 visitors each year.
In 2012, the mine comprises nineteen levels, eleven underground. From the entrance, the mine extends up to 730 meters in the mountain; the total length of the galleries is about 40 km; the underground part covers an area of at least 110 km. The extraction of rock salt is done according to the method of rooms and pillars: half of the salt is extracted, the rest is used to support the roof. The extraction of salt is done manually by workers "holders of a hereditary exploitation title" which is transmitted to them by an established system of the time of the British occupation.
Here, in the idea of preserving these magnificent resources or to leave them at the disposal of the health of some, Epicezmoica will not put on sale these marvels any more. I hope that you understand my approach and that you will excuse me for this inconvenience.