Paleomagnetism of the Ordovician and Early Carboniferous Geological Complexes of Tuva

Paleomagnetic studies of the Early, Middle Ordovician and Early Carboniferous strata of Tuva have been carried out. It has been established that the Ordovician strata of Tuva accumulated in the latitude range from 4° to 12° S. The coordinates of the Ordovician paleomagnetic pole for Tuva (for the southern hemisphere) are Φ = –41° N, Λ = 127° E, A95 = 5.4°. The lower Carboniferous strata of Tuva accumulated at high latitudes: 51°–70.5° N. Coordinates of the paleomagnetic pole for the Lower Carboniferous of Tuva: Φ = 53.8° N, Λ = 141.7° E, A95 = 9.6°. The Tuva block as a whole did not experience significant rotations relative to Siberia in the Phanerozoic. Nevertheless, there were local deformations and rotations of rocks, which led to differences in the declination of the magnetization of the strata of Siberia and the Tuva block. Tuva, already from the Ordovician, was part of the structure of Siberia and experienced latitudinal movement along with it. Caledonian structures were formed on the margin of Siberia. Postcollisional Phanerozoic magmatism of the Altai-Sayan region has an intraplate genesis.