Influence of mechanic stresses on remanent magnetization of oceanic basalts

We studied the change of remanent saturation magnetization of ocean basalts exposed to different types of compression: uniaxial, quasihydrostatic, and hydrostatic. It is found that the character of remanent magnetization changes depends on the compression type and magnetization direction in the space. The stability of the remanent magnetization grows both with the increase of coercive force of ferrimagnetic grains and in passing from titanomagnetite to magnetite. It is shown that from the change of the remanent magnetization during laboratory specimen compression one can judge the in situ tectonic impacts suffered by rocks.