Geophysical Journal | 2012 volume 34 4

Deep sources of regional magnetic anomalies: tectonotypes and relation with transcrustal faults

© Orliuk M.I., Pashkevich I.K.

Dual nature of deep sources of regional magnetic anomalies has been considered. First, tectonotypes of deep sources are rift and subduction-obduction zones of the Earth's crust, specified by its saturation with products of magmatic activity of basic and average composition under favorable thermodynamic and oxidation-reduction conditions for realization of iron as ferromagnetic minerals. Secondly, these are zones of trans-crustal faults in geodynamic regime of the Earth's crust extension with wide development in their deep parts of diffusion and fluid processes with re-crystallization of ferruginous minerals into ferromagnetic varieties.

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