Remanent Magnetism

Also called residual magnetism, refers to the permanent magnetization preserved within the ferromagnetic minerals inside rocks, like meteorites. The presence of a magnetic field assumes and requires a differentiated parent body that contained a liquid core sometime in its past. When a rock cools below its Curie temperature, it acquires its primary component of remanence magnetism (thermo-remanent magnetism), and preserves its parent body’s magnetic field. Rocks can also contain evidence of superimposed secondary components of natural remanent magnetism. Natural remanent magnetization forms the basis of paleomagnetism.

This entry was posted in . Bookmark the permalink.