Abstract Geophysicists have long called it a new earth-nuclear puzzle: they have a hard time explaining how to maintain a magnetic field billions of years ago when the earth that was born in high temperatures cooled down. Now, scientists have proposed two different interpretations. Both explanations are based on the minerals outside the earth...
Geophysicists have long called it a new earth-nuclear puzzle: they have a hard time explaining how to maintain a magnetic field billions of years ago when the earth that was born in high temperatures cooled down. 
Kei Hirose, a geophysicist at Tokyo Institute of Technology in Japan, chose silica. He conducted a high-pressure experiment inside the Earth and said in a recent report of the American Geophysical Union in San Francisco, California: "I explain this. Very confident."
But geophysicist David Stevenson of the California Institute of Technology said that the key to solving this problem is not silica, but magnesium oxide. In a study to be published, Stevenson suggested that magnesium is precipitated in the early Earth's melting, which may produce buoyancy differences and become the driving force behind the ancient earth.
The core contradictory doctrine began to appear in 2012, when several research teams reported that the geocentric is losing heat at a higher rate than expected. More heat loss from the center of the earth means that there will be less heat to stir the liquid lava of the center. This is very important because some studies have suggested that the Earth may have a magnetic field more than 4 billion years ago, which was only about 500 million years old from the debris that burned around the newborn sun. "The Earth needs more or less sustainable generators," said geophysicist Peter Driscoll of the Carnegie Institute of Science in Washington, DC.
In a laboratory in Tokyo, Hirose mixes different minerals such as iron, silicon and oxygen into a diamond pressure chamber, which is squeezed to produce super-high pressures that reach temperatures in excess of 4000 °C, mimicking the interior of the Earth. dynamic. He found that as long as silicon and oxygen are present, these two elements crystallize and form silicon dioxide.
When silica is precipitated from the early Earth, the remaining lava will continue to rise and rise, and Hirose reports that the agitation power needed to maintain the Earth's magnetic force is formed. “At the moment, I think this is the most viable mechanism to drive the 'earth generator',†he said.
However, Stevenson supports magnesium and says it is "more reasonable" than silica because magnesium oxide will first precipitate out of the earth's melting. He said that Hirose is talking about "what might happen, not what has happened."
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