Abstract

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.

中文翻译：

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图瓦奥陶纪和早石炭世地质杂岩体的古地磁

摘要

对图瓦早、中奥陶世和早石炭世地层进行了古地磁研究。已确定图瓦奥陶系地层在南纬4°至12°范围内堆积。图瓦奥陶纪古地磁极坐标（南半球）为Φ = –41° N, Λ = 127° E，A95 = 5.4°。图瓦下石炭统地层堆积在高纬度：51°–70.5° N。 图瓦下石炭统古地磁极坐标：Φ = 53.8° N，Λ = 141.7° E，A95 = 9.6°。图瓦地块整体在显生宙中没有经历相对于西伯利亚的显着旋转。然而，由于岩石的局部变形和旋转，导致西伯利亚地层和图瓦地块磁化强度的偏角存在差异。图瓦，已经来自奥陶纪，是西伯利亚结构的一部分，并随之经历了纬度运动。Caledonian 构造形成于西伯利亚的边缘。阿尔泰-萨彦地区的碰撞后显生宙岩浆活动具有板内成因。