Earth’s interior is cooling faster, revealed in the laboratory
Scientists have come to know a unique thing from the results of some experiments conducted in the laboratory regarding the internal parts of the Earth. They have found that the speed of the cooling of the interior of the Earth was as much as was understood. He’s too fast. That is, the interior of the Earth is cooling faster than expected. This can affect volcanoes, tectonic activity, the Earth’s magnetic system.
It is really interesting that the Earth, which started forming about 4.5 billion years ago, has not cooled from inside yet. Of course it is getting colder, but what is its rate is not completely clear. Much still needs to be known about the interior of the Earth. In the new study, researchers at ETH in Zurich in the laboratory demonstrated how well a common mineral found at the boundary between Earth’s core and mantle is a good heat conductor. But from this experiment, they came to the conclusion that the heat of the Earth can fly away sooner than it has been understood. (symbolic photo: Pixabay)
Evolution of Earth is actually the story of its cooling. 4.5 billion years ago the surface of the young Earth was undergoing extreme temperatures and was covered by a deep ocean of magma. Over millions of years, the Earth’s surface cooled and became a solid crust. But there was a huge amount of heat in the interior of the Earth. Due to this many dynamic processes like mantle convection, plate tectonic and volcanism started. Yet it did not get a clear answer as to how quickly the Earth cooled down and when these heat-borne processes would stop going forward. (symbolic photo: shutterstock)
One possible answer to this is the thermal conductivity of minerals that lie at the boundary of the Earth’s core and mantle. This boundary between the two is very important because here the viscous rocks of the mantle come into contact with the molten mixture of iron and nickel from the core outside the Earth. The rate of change of temperature between the two layers is very much inside and a huge amount of heat flow is seen here. There is mainly bridgmanite on their border. (file photo)
But researchers were having a lot of trouble estimating how much heat was being conducted through the Bridgmanite mineral from the Earth’s core to the mantle. Now Professor Motohiko Murakami of ETH and his colleagues at the Carnegie Institute for Science have developed an esoteric measurement system. The heat conductivity of bridgmanite can be measured in the laboratory. This measurement was done under conditions of high pressure and temperature that occur inside the Earth. For this, the researchers used an optical absorption measurement system in which the diamond was heated by a laser. (symbolic photo: shutterstock)
Murakami said that this measurement system showed that the heat conductivity of bridgmanite was 1.5 times higher than what was being estimated. This suggests that the heat flow between the Earth’s core and mantle was greater than previously thought. More heat flow meant that there would be more convection in the mantle, which would accelerate the rate of cooling of the Earth. This will rapidly slow down tectonic plates that are moved by the flow of the mantle. (symbolic photo: shutterstock)