It also extracts the so called incompatible elements which don t fit into mantle minerals and move into the liquid melt.
Why didnt granite sink down into eaths mantel.
There is no basalt under the continent s granite.
At the bottom of the mantle the material travels horizontally and is heated by the core.
This process also hinges on the presence of water which forms a necessary ingredient in an important early crystallizing mineral called amphibole campbell says.
The earth has gas.
Unexpectedly helium hydrogen nitrogen and even carbon dioxide from microbes were found all along the borehole.
The mantle lies between earth s dense super heated core and its thin outer layer the crust.
The mantle is about 2 900 kilometers 1 802 miles thick and makes up a whopping 84 of earth s total volume.
It eventually becomes cool and dense enough to sink back down into the mantle.
The mantle extends down to 2 890 km into the earth s surface temperatures that range from 500 to 900 degrees celsius in the upper portion to over 4 000 degrees celsius near the core boundary.
They separate and sink down into the mantle leaving behind silica rich magma that has the right composition to form granite.
It reaches the location where warm mantle material rises and the mantle convection cell is complete.