The Kola ultra-deep borehole is now located near the Kola Peninsula in Russia. It was explored by former Soviet scientists in 1970. Finally, due to insufficient funding, the drilling work was stopped in 1994. The deepest one has reached 12,262 meters, and it still holds the world’s deepest drilling record. And at that time, a gold formation with a high gold content was discovered. Let’s follow the editor and walk into the Kola ultra-deep borehole to take a look.
The Kola ultra-deep borehole was drilled on the Kola Peninsula in the Soviet Union in 1970. It was during the Cold War between the Soviet Union and the United States. The former Soviet Union decided to dig this deep well for scientific research, or to compete with the United States. Drilling of the Kola ultra-deep borehole was stopped in 1994. In 1983, the drilling depth had reached 12,000 meters, and it was decided to stop further drilling. The subsequent 262 meters were actually completed between 1983 and 1993 for ten years, and the reason for the final stop was insufficient funding. The Kola ultra-deep drilling still holds the world’s deepest drilling record.
At that time, when the depth of the Kola ultra-deep borehole reached 9,500 meters, the drill bit penetrated into a formation with an extremely high content of gold and diamonds. At that time, scientists took out the core, and after research and analysis, they found that the gold content was as high as 80 g/ton. It is reported that if a gold deposit with a gold content of 4 g/ton, it has commercial mining value, and it is rare to find deposits with a gold content of more than 10 g/ton in the surface of the earth, so it can be regarded as a treasure of gold. .
Since then, Kola’s ultra-deep drilling research continued for several years, until the funds were exhausted in 2006. In 2008, the site was abandoned and the Kola ultra-deep hole was covered with rusty metal caps.