A study on magnetic susceptibility of igneous rocks from the Sikhote-Alin orogenic belt showed that zones in which ilmenite- or magnetite-series rocks predominate formed during the Albian-Cenomanian magmatic stage. This zonation which is independent of petrochemical composition, type and age of rocks persisted until at least the Paleocene. There is also no connection with terranes. According to the authors, redox zonation in the post-Cenomanian period was heavily influenced by the granite-metamorphic layer of the new continental crust of the Sikhote-Alin orogen, which formed at the beginning of the Late Cretaceous.