Abstract
A combined magnetomineralogical analysis of a doleritic collection gathered from four natural outcrops in the mouth area of the Stolbovaya River revealed a spinodal pattern of the decomposition of a magnetite-ulvospinel solid solution (the stage of the “modulated structure” formation) in the ferromagnetic fraction of samples. Homogenization of exsolution structures during thermal treatment of the majority of the collected samples is shown to involve the effect of partial self-reversal of thermoremanent magnetization. A distinct dependence of the effect on the level of internal elastic stresses suggests that a reverse component of J n can arise during some phases of the spinodal stage of the solid solution decomposition in natural titanomagnetites.
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Original Russian Text © A.K. Gapeev, S.K. Gribov, 2008, published in Fizika Zemli, 2008, No. 10, pp. 75–92.
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Gapeev, A.K., Gribov, S.K. Magnetic properties of intrusive traps of the Siberian platform: Evidence for a self-reversal of the natural remanent magnetization. Izv., Phys. Solid Earth 44, 822–838 (2008). https://doi.org/10.1134/S1069351308100108
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DOI: https://doi.org/10.1134/S1069351308100108