Earth Mantle Generated Planet Early Magnetic Field

Ever thought from where did our planet's magnetic field come from. Earth's mantle, not its core, may have generated the planet's early magnetic field, according to new research.

A very poor electrical conductor, silicate material, earth’s mantle is made up of that. Therefore, for billions of years, even if the lowermost mantle were liquid, quick fluid motions inside it wouldn't produce large electrical currents needed for magnetic field generation, similar to how Earth's dynamo currently works in the core.
Provide new estimates for the thermodynamics of magnetic field generation within the liquid portion of the early Earth's mantle is provided in a study seeming in the journal Earth and Planetary Science Letters, Leah Ziegler, Scripps Oceanography researchers Dave Stegman, and Nicolas Blanc.
The liquid silicate might actually be more electrically conductive than what was generally believed asserted by the team of Stegman.
Stegman said that currently, they have no grand unifying theory for how Earth has evolved thermally. They don't have this conceptual framework for understanding the planet's evolution. This is one viable hypothesis. New research lends belief to an unorthodox retelling of the story of early Earth first proposed by a geophysicist at Scripps Institution of Oceanography at the University of California San Diego.
Earth's liquid outer core has always been the source of the dynamo that generates its magnetic field; it has been a bedrock tenet of geophysics.
The concept to consider whether it's possible that Venus might have at one point generated a magnetic field within a molten mantle by the Arizona State geophysicist Joseph O'Rourke applied Stegman.
Magnetic fields develop on Earth and other planets that have metallic cores, liquid, rotate rapidly, and experience conditions that make the convection of heat possible.
The mantle could have provided the young planet's first magnetic shield against cosmic radiation only if the Stegman's premise is correct. Later in history, it could also reinforce studies of how tectonics evolved on the planet.
Stegman also said that if the magnetic field was produced in the molten lower mantle above the core, then Earth had protection from the very beginning and that might have made life on Earth possible sooner

By: Suvarna Gupta

Content: https://www.tribuneindia.com/news/earths-mantle-generated-planets-early-magnetic-field-55912