0
we dnt no :)
We can only estimate. There are two types of crust: continental and oceanic. By volume the continental makes up about 70% and the oceanic makes up about 30%. Continental crust varies from 30 to 70km thick (with an avearge of 40km or so) and has an average density of 2.7 g/cm^3. Oceanic crust varies from 5 to 10km thick (with an average of 8km or so) and a density of about 3.3 g/cm^3. We can calculate the weighted average for the thickness of the total crust and get an estimate of about 30.4 km:
70% * 40 km + 30% * 8 km = 30.4km
Calculate the volume of the total crust as the difference between the total volume of the Earth and the volume less the crust. Using an average radius on Earth of 6371km:
4/3 * pi * (6371 km^3 - 6340.6 km^3) = 1.54321 *10^10 km^3 = 1.54321 *10^19m^3
Remember that by volume this is 70% continental and 30% oceanic. Using this and the densities given above we can calculate the masses of each part of the crust:
Continental:
1.54321 *10^19 m^3 * 70% * 2700 kg/m^3 = 2.92 * 10^22 kg
Oceanic:
1.54321 *10^19 m^3 * 30% * 3300 kg/m^3 = 1.53 * 10^22 kg
This gives a total bulk mass of the crust of around 4.45 * 10^22 kg.
A quick search on the internet tells me that the average gold grade in the bulk crust is 0.0011 ppm gold. This equates to 0.0011 grams of gold per tonne of crust. So:
4.45 * 10^22 kg = 4.45 *10^19 tonnes
4.45 * 10^19 tonnes * 0.0011 g/tonne = 4.90 * 10^16 g of gold
This works out to approximately 50 billion tonnes of gold, or at current gold prices (~$1200/ounce) approximately $2,000,000,000,000,000,000! (of course with that much gold available, I doubt gold prices would stay at $1200 an ounce).
Of course the are all estimates, but the moral of the story is that if you could find a way to economically extract this gold, you would be a very rich person.
What else can I help you with?
Earths thin rocky outer layer is its .?
crust
How wide is the crust?
The Earth's crust can vary in thickness, but on average it is about 5-70 kilometers (3-44 miles) thick. However, it can be much thicker under mountain ranges and thinner under the ocean floor.
What is another word for earths outer surface?
Another word for Earth's outer surface is "crust."
How do you extract gold from the earths crust?
Gold is typically extracted from the Earth's crust through a process called mining, which involves techniques such as open-pit mining, underground mining, or placer mining. The extracted gold-bearing ore is then further processed using techniques like crushing, grinding, and chemical leaching to separate the gold from the ore. Finally, the gold is refined to ensure a high level of purity.
What is the name of the earths thinnest layer?
The crust, more specifically the lithosphere.
What metal is found as itself in the earths crust?
Iron , Aluminium and Copper Can Be Found , Also Gold Can Be Found Uncombined in the Earths Crust .
Why did Boudicca wear a gold medalinan come from?
Comes from the sun and earths crust
How Much Aluminum Is Found In The Earths Crust?
8.1% by weight
What is much of earths crust made up of?
Water 75%
What is the size of the earths crust?
The Earths crust is approximately 650 km deep.
Is gold found in earths crust and where?
Gold Sulfate is found naturally only in geological zones called oxidizing sulfide deposits or oxidizing sulfide bodies.
How much of the earths surface is covered by india?
India is not covering some of the earth's crust but part of the earth's crust is part of India
What causes the earths crust to rise and fall?
The sudden vibration in the plates inside the crust causes the earths crust to rise & fall.
What is under the earths surface and in the earths crust?
mantle
Why is the stress the earths crust?
The earth's crust is not stress
How much of earths crust is made up of oxygen and silcon?
47 % oxygen & 27% silicon.
The crust is only what of earths thickness?
half of earths layer
