Originally posted by David Gould
How much ore is removed from the earth?
None - it all stays here.
Seriously, though, I have no idea. Millions and millions of tonnes - a tiny fraction of the mass of the earth.
How much matter comes out with the ore? Millions and millions of tonnes.
What is done with the stuff that they dig out with the ore? Some of it is put back, some of it is dumped in tailings, much of it lies around in mounds and gets grown over after a few decades.
Of course, a town like Queenstown in Tasmania shows that this does not always happen - the place does not grow plants anymore because of the stuff they dug up.
How many holes are there in the earth? Many, many. But they are only very small in comparison to the size of the earth. Johanesburg is built on top of an area riddled with mines. Some people have worried that some of the buildings may be in danger of collapsing one day.
The deepest mine is only a few miles deep - by comparison, the Earth is thousands of kilometres in diametre.
Which way do the holes go - down, up straight ahead (more or less)? I am not sure. Usually they go down a way and then along. They follow the seams of ore.
What happens when the miners hit water? Sometimes that means the end of the mine. They can pump the water out of various areas to dig into them if they have to but the returns need to be worth while.
Much of the above is educated guesswork, however.
Mines do not make a significant dent in the the earth as yet.
Impact craters like the gulf of mexico show how insignificant our hole digging has been.
Hey David,
Thanks for taking the time to respond to my questions.
Consider for a moment this serious, serious question:
What is the purpose that metals serve in the earth?
Now, I'll disclose some of what I'm getting at.
I asked many questions about metals. What are they? Where do they come from? Where are they found? How are they found? How are they used? And, what purpose do they serve in the earth?
And, I discovered something. For the countless millenia that men have used metals, never before have metals been so abundantly mined and utilized as they are in this current day.
Look around you. Your home has rerod, hardware cloth and other metal objects in its framework. Your plumbing fixtures and some of the pipes are metal. Your small and large appliances are of metal. Your clothing has metal buttons, zippers and clasps. And, they're put on with metal tools. Your computer is made of metals. Your tables and other furniture are composed, in part, of metal items. Your streets have metal components. Your bridges and other thruways have metal framework. There are metal streetlights, signs and signals. Just consider how much metal has been used in the vehicles driven in North America alone, since the inception of the motor vehicle. And, there's more, many more things made of metal.
Much of what is made of metal these days is discarded within a short time. The waste dumps are full of metals.
In my pondering, I found a sketch of a cross-section of a gold mine. Instantly, I saw something startling to me. I saw, from looking at that sketch, what metals do for the earth. And, I was shocked beyond comprehension.
Metal is the CAULKING of the earth. It is metal that binds the structures of the earth together - integrous. Metal maintains the integrity of the mountains, hills and other geographic aspects of the earth.
There are more things that I can discuss besides metals. For instance, look at the forests that are disappearing so very rapidly these days. Men destroy the forests to find ores, to clear land for manufacturing plants, to obtain lumber, and to build housing tracts.
If you were to marvel at the forests in their perfection, you'd discover that they provide many important things to the earth. Food, shelter, watershed, breathable air, to name a few. Forests are to be marvelled at and not destroyed.
Then, look at the waterways in North America. When the pilgrims landed in 1521, how many waterways were clean? All of them. How many forests existed? Abundant were their numbers.
Today, how many waterways are clean in North America? Maybe 3. Water is a scarce commodity. The US Geological Survey Team is avidly searching for underground sources of water - aquifers - to meet the water needs of men. WHY??? There had been so much water to drink and use before 1940!! Now, it's just about all polluted by industrial and domestic waste.
Why were these things not harmed before this past century? Probably because there had been little to no mining in this continent, compared to what is happening today. I heard the other day that diamonds are voraciously being mined in Canada nowadays. Why?? For money.
For money, men dig up the earth to make discardable merchandise.
For money, men destroy ancient forests to make discardable things.
For money, men pollute the waters to get rid of the discards from what they do.
Now, when will it all end, David?
Is it going to continue?? It can't. The earth is being destroyed so rapidly today that it's not going to continue for long. It can't.
The air is polluted. There are few trees to replenish our oxygen. Seventy percent of the earth's breathable oxygen comes from the few remaining rain forests, which are being reduced as I type.
If only men had stopped to marvel at the perfection of what exists and had asked why do these things exist as they do, before they destroyed these things, it might have been different.
That's my point.
Patty