Thrust and strike-slip deformations on the southern part of polar Urals based on the rock magnetic data

Abstract

Petromagnetic characteristics rocks croup out in the Main Uralian Fault zone and Voikar- Synya ophiolites confirmed that multistage deformation led to formation of modern structure of Ural. Analysis of the anisotropy of the magnetic susceptibility of rock minerals detects orienta- tion formed by the thrust (reverse faults) and strike-shear strain at an early stage of the Uralian orogeny. The main axes of the ellipsoid of the anisotropy of magnetic susceptibility associated with regional thrusting - the main stage of formation of structure of the Urals have been revealed rarely. It indicates almost complete resetting thrust petrofabric by later shear deformations.

Nyrdvomenshor Gem Stones Deposit, Polar Urals, Russia

“…Eluvial-deluvial, fluvioglacial and alluvial deposits are common. Rai-Iz massif according to [45]. 1 -formations of the Paleozoic passive margin of the Eastern European continent; 2 -Precambrian metamorphic formations of the Kharbeyskiy block; 3 l -Rai Iz-Voikar duniteharzburgite complex; 4 -Kershor dunite-wehrlite-clinopyroxenite-gabbroic complex; 5 -Devonian island-arc granitoids of the Sob and Yanaslor complexes; 6 -quaternary sedimentary deposits; 7serpentinites; 8 -clay-siliceous, carbonaceous-siliceous shales, main metaeffusives; 9 -dunites, harzburgites; 10 -faults; 11 -ornamental stone in alluvium; 12 -ornamental stone in eluvium and deluvium; 13 -ornamental stone in the bedrock; 14 -jadeite; 15 -nephrite; 16 -rodingite.…”