Eric Farthing asked us the following via our Facebook group:
What is the deepest man has gone under the surface of the earth?
This got our Agents talking, and we did a bit of research on this. Here is what we found.
A: There is on-going debate as to the deepest man has gone in to the Earth’s crust. In terms of deepest holes, Kimberly Mine and Jagersfontein Mine, both diamond mines and both in South Africa, battle it out for the deepest hole. Historian Steve Lunderstedt concluded that Jagersfontein Mine was the deepest in 2005.
More details:
The biggest man-made excavation is actually the Bingham Canyon Mine in Utah. This mine is 0.75 miles (1.2 km) deep, 2.5 miles (4 km) wide, and covers 1,900 acres. However, Jagersfontein and Kimberley are deeper so are probably the deepest that man has actually trodden.
However, these pale into insignifance compared to the Kola Well on the Russian Kola penninsula. This hole is 40,o00 feet deep! The Kola well has now penetrated about halfway through the crust of the Baltic continental shield, exposing rocks 2.7 billion years old at the bottom (for comparison, the Vishnu schist at the bottom of the Grand Canyon dates to about 2 billion years–the earth itself is about 4.6 billion years old). However, man has not entered at this depth – so this doesn’t answer Eric’s question!
Since Jagersfontein was established in 1888, two of the ten biggest diamonds ever discovered, the Excelsior and the Reitz (now called the Jubilee) were mined from there.
This whole area sparks great debate in the geological circles and we would love your input into our findings.
Sources:
http://www.gi.alaska.edu/ScienceForum/ASF7/725.html
http://www.kennecott.com/
http://www.showcaves.com/english/za/mines/Jagersfontein.html
http://www.news24.com/News24/South_Africa/News/0,,2-7-1442_1708011,00.html
http://officespam.chattablogs.com/archives/2006/10/worlds-largest-manmade-hole.html