biostudies-literatureKletetschka GMinistry of Education, Youth and ScienceGrantová Agentura České Republiky22466https://www.ebi.ac.uk/biostudies/studies/S-EPMC8599688biostudies-literatureUnknown11(1)The shock exposure of the Santa Fe's impact structure in New Mexico is evidenced by large human-size shatter cones. We discovered a new magnetic mechanism that allows a magnetic detection of plasma's presence during the impact processes. Rock fragments from the impactites were once magnetized by a geomagnetic field. Our novel approach, based on Neel's theory, revealed more than an order of magnitude lower magnetizations in the rocks that were exposed to the shockwave. Here we present a support for a newly proposed mechanism where the shock wave appearance can generate magnetic shielding that allow keeping the magnetic grains in a superparamagnetic-like state shortly after the shock's exposure, and leaves the individual magnetized grains in random orientations, significantly lowering the ovScientific reportsPlasma shielding removes prior magnetization record from impacted rocks near Santa Fe, New Mexico.PMC8599688LTAUSA 1914120-08294SKletetschka GKavkova RUcar HfalsePlasma shielding removes prior magnetization record from impacted rocks near Santa Fe, New Mexico.The shock exposure of the Santa Fe's impact structure in New Mexico is evidenced by large human-size shatter cones. We discovered a new magnetic mechanism that allows a magnetic detection of plasma's presence during the impact processes. Rock fragments from the impactites were once magnetized by a geomagnetic field. Our novel approach, based on Neel's theory, revealed more than an order of magnitude lower magnetizations in the rocks that were exposed to the shockwave. Here we present a support for a newly proposed mechanism where the shock wave appearance can generate magnetic shielding that allow keeping the magnetic grains in a superparamagnetic-like state shortly after the shock's exposure, and leaves the individual magnetized grains in random orientations, significantly lowering the ov2021-01-01T00:00:00Z2021 Nov2026-03-16T15:11:19.351Z2022-02-11T13:02:08.963ZS-EPMC85996883478976310.1038/s41598-021-01451-8