Menu Minerals reveal record of magnetic fields Minerals reveal record of magnetic fields Fresh discoveries about common minerals are helping scientists better understand the nature of Earth’s magnetic fields. Hi-tech imaging technology is enabling researchers to study tiny magnetic spirals in grains of the naturally occurring mineral magnetite, found in rocks in the Earth’s crust. They have found that these structural vortices – formed during the cooling of molten rock – are unaltered by temperature change, as so act as a record of the Earth’s magnetic field. The discovery could help scientists document how the planet’s magnetic properties have changed over billions of years, and aid understanding of the Earth’s core and plate tectonics. High-resolution images A team of researchers led by
来源(Source From): http://www.ed.ac.uk/news/2016/minerals-reveal-record-of-magnetic-fields