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Boring Through The Crust Of The Earth

 

By James Donahue

August 2005

 

We noticed a report not long ago that a scientific team comprising The Integrated Ocean Drilling Program recently drilled a hole successfully through the outer crust of the Earth and reached the “Mojo.”

 

Mojo is a nickname for the Mohorovicic discontinuity, or a division between the crust and the hot mantle.

 

The hole, drilled on the floor of the Atlantic Ocean where the crust is believed to be thinner, involved drilling for 4,644 feet, something short of 5,280 feet or a mile.

 

Having once worked among the oil well drilling rigs in my younger years, I wondered why a mile-deep hole in the ground was considered such an important milestone. Some of the rigs I worked around went at least 2000 feet down within weeks and we didn’t think much of it.

 

One Alaskan drill site, believed to be among the deepest in the world, went to 20,203 feet. Some of the copper mines in the Upper Peninsula of Michigan are known to have been dug my miners to depths of over a mile.

 

It is said the gold mines in South Africa go so deep in the earth that miners work in extreme heat because they are close if not inside the mantle. That means they could be miles down.

 

The deepest research borehole known was drilled in Russia. A massive rig drilled to over 12 kilometers, or an estimated 7.4 miles into the Continental Crust. It was reported that the drilling crew found fractures, fissures and water-bearing zones there where they were not expected.

 

So with all of this digging and drilling that has been going on for decades, what is the significance of the Moho Project? The National Science Foundation claims it is the third deepest hole ever made in the floor of the sea and that rocks brought back to the surface are giving new information about the composition of the Earth.

 

Geologist Barbara John said in a story for Live Science that further drilling is expected, following a complete analysis of the material removed from the drilling to date.

 

“Our major result is that we’ve recovered the lower crust for the first time and have confirmed that the Earth’s crust at this locality is more complicated than we thought.”

 

Once the drill gets into the mantle, the geologists will know it because the material brought up will have different texture and chemistry.

 

The project is expected to continue for 10 years at a cost of $1.5 billion. And that begs the question . . . is the information they glean from the work going to be worth the price?

 

This planet has had so many natural upheavals from exploding volcanoes and large objects colliding from space that studying the composition of the underside of our planet should not be that difficult, or complicated.

 

The natural movement of the planet’s plates are forcing the constant upheaval of land mass which exposes material from deep in the Earth.

 

There is a large hole in the earth at Vredefort, South Africa, where a giant meteorite or asteroid slammed into the Earth over 2000 million years ago, blasting a hole 25 kilometers deep and causing the crust of the Earth to blow outward, bringing the deep crustal rocks right to the surface.

 

We might suggest that these scientists use some of this cash to buy plane fares to South Africa to either visit the site at Vredefort, or else go down with the diamond miners to examine first hand what the planet looks like a mile or two below the surface.

 

 
















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