TY - JOUR

T1 - Geological Structure of the Novaya Zemlya Archipelago (West Russian Arctic) and Peculiarities of the Tectonics of the Eurasian Arctic

AU - Korago, E. A.

AU - Kovaleva, G. N.

AU - Schekoldin, R. A.

AU - Il’in, V. F.

AU - Gusev, E. A.

AU - Krylov, A. A.

AU - Gorbunov, D. A.

PY - 2022/4/1

Y1 - 2022/4/1

N2 - Abstract: Our study considers the structure and tectonics of the Novaya Zemlya archipelago, located in the west Russian Arctic and part of the Eurasian Arctic: (i) the age of the Pre-Paleozoic basement of the North block of the archipelago and the geodynamic sedimentation conditions in its northern end, where many kilometers of turbidite sedimentary strata accumulated in the paleobasin during the Late Vendian-Silurian; (ii) the significance of Caledonian tectogenesis in the geological history of the archipelago; (iii) the age and causes of the Late Hercynian (?)-Early Cimmerian orogeny in the Novaya Zemlya archipelago and the relationship of the archipelago structures with the structures of the Urals; (iv) the age and causes for the formation of the modern relief of the Novaya Zemlya archipelago; (v) evidence of active movements of the shelves of the Barents and Kara Seas surrounding Novaya Zemlya. The age of the most ancient rock dating in the area of the Main Novaya Zemlya Fault corresponds to the Vendian (598 ± 26; 609 ± 4 Ma), and the model age of the protolith is estimated at 1 Ga. Two blocks have been established for the Precambrian (North and South) and three, for Middle-Late Paleozoic (North, Central and South). The Middle-Late Paleozoic stage is considered as a reflection of the tectonic-magmatic activation manifested in the Caledonides of Greenland and Scandinavia. The episodes of basic and granitoid magmatism in the intervals of 730–690 and 610–590 Ma indicate the presence of blocks of the former Arctida (?) in the west (Novaya Zemlya), in the central part (Severnaya Zemlya), and in the east (New Siberian Islands and Wrangel Island) of the modern Arctic. Basic areal (plume) magmatism occurred in the Late Devonian, in the Late Permian-Early Triassic and Late Mesozoic. The features of the geological structure of the Novaya Zemlya archipelago strictly correspond to the three orographic areas (tectonic blocks) of the archipelago. The Western and Eastern Novaya Zemlya troughs are the tectonic pairs with the Novaya Zemlya orogen. The heights of the dated sea terraces indicate significant rates of neotectonic uplift of the archipelago.

AB - Abstract: Our study considers the structure and tectonics of the Novaya Zemlya archipelago, located in the west Russian Arctic and part of the Eurasian Arctic: (i) the age of the Pre-Paleozoic basement of the North block of the archipelago and the geodynamic sedimentation conditions in its northern end, where many kilometers of turbidite sedimentary strata accumulated in the paleobasin during the Late Vendian-Silurian; (ii) the significance of Caledonian tectogenesis in the geological history of the archipelago; (iii) the age and causes of the Late Hercynian (?)-Early Cimmerian orogeny in the Novaya Zemlya archipelago and the relationship of the archipelago structures with the structures of the Urals; (iv) the age and causes for the formation of the modern relief of the Novaya Zemlya archipelago; (v) evidence of active movements of the shelves of the Barents and Kara Seas surrounding Novaya Zemlya. The age of the most ancient rock dating in the area of the Main Novaya Zemlya Fault corresponds to the Vendian (598 ± 26; 609 ± 4 Ma), and the model age of the protolith is estimated at 1 Ga. Two blocks have been established for the Precambrian (North and South) and three, for Middle-Late Paleozoic (North, Central and South). The Middle-Late Paleozoic stage is considered as a reflection of the tectonic-magmatic activation manifested in the Caledonides of Greenland and Scandinavia. The episodes of basic and granitoid magmatism in the intervals of 730–690 and 610–590 Ma indicate the presence of blocks of the former Arctida (?) in the west (Novaya Zemlya), in the central part (Severnaya Zemlya), and in the east (New Siberian Islands and Wrangel Island) of the modern Arctic. Basic areal (plume) magmatism occurred in the Late Devonian, in the Late Permian-Early Triassic and Late Mesozoic. The features of the geological structure of the Novaya Zemlya archipelago strictly correspond to the three orographic areas (tectonic blocks) of the archipelago. The Western and Eastern Novaya Zemlya troughs are the tectonic pairs with the Novaya Zemlya orogen. The heights of the dated sea terraces indicate significant rates of neotectonic uplift of the archipelago.

KW - age of the Precambrian basement

KW - and Late Mesozoic

KW - basic and granitoid magmatism of the Late Precambrian

KW - Eurasian Arctic

KW - geomorphology

KW - granitoids of the Mityushev Kamen and Zapasov Mountain

KW - marine terraces

KW - Novaya Zemlya archipelago

KW - Novaya Zemlya orogen

KW - orography

KW - Permian-Triassic

KW - plume magmatism of the Devonian

KW - Quaternary deposits

UR - http://www.scopus.com/inward/record.url?scp=85133007595&partnerID=8YFLogxK

U2 - 10.1134/S0016852122020030

DO - 10.1134/S0016852122020030

M3 - Article

AN - SCOPUS:85133007595

VL - 56

SP - 123

EP - 156

JO - Geotectonics

JF - Geotectonics

SN - 0016-8521

IS - 2

ER -