A long history of diverse magmatism of the Omolon Cratonal Terrane (OM) is traced from the Paleoproterozoic to the Late Miocene. The new isotope-geochronological (U-Pb, 40Ar/39Ar) dating and geochemical data allowed us to reliably identify nine main episodes and geodynamic settings of magmatism, as well as to discuss in detail potential sources of detrital zircon populations in sedimentary rocks of northeastern Russia. The earliest manifestations of fleck gneisses of the anorogenic Upper Оmolon complex with an age of about 1.9 Ga reflect the rifting and the beginning of destruction of the Precambrian basement which has the age of about 3.2 Ga. The ongoing rifting of the OM is traced in the Riphean, when swarms of dikes and small bodies of the gabbro-diabase Strelkin complex were intruded. In the Silurian (433–425 Ma), in oblique shears and local extension zones of the OM, plutonic syenite magmas of the Anmandykan and granitoids of the Abkit complexes (ENd from –23 to –10) are intruded. The largest manifestations of plutonic and volcanic magmatism were recorded in the OM in the Late Devonian (from 375 ± 3 to 356 ± 4 Ma), when calc-alkaline suprasubduction volcano-plutonic complexes (Bulun hypabyssal and Kedon volcanic) were formed. The Nd isotopic composition of Devonian magmas (ENd from –20 to –6), with an extremely low content of radiogenic lead isotopes (206Pb/204Pb = 17.2–15.7) indicates their melting from a mature crustal protolith in the OM basement. Early and Middle Jurassic rifting locally manifested on the OM, which are reflected by the Tummin trachybasalt and Omolon essexite-teschenite complexes. The Early Cretaceous (144–133 Ma, ENd from +7 to 0) Namyndykan and Egdegkych granodiorite-monzonite plutonic complexes form suprasubduction zones of an island-arc nature on the northeastern margin of the OM. In the Santonian-Campanian time (~ 85–77 Ma), the Early Cretaceous extension zone on the Omolon massif was healed by the Kongin and Viktorin calc-alkaline complexes of the Okhotsk-Chukotka volcanic-plutonic belt. The final stage of magmatism in the OM is represented by intraplate alkali-basaltic volcanism in the interval from 9 to 7 ± 1 Ma. Synchronization in time of the manifestation of the most voluminous Late Devonian suprasubduction magmatism of the OM and basaltic LIP-magmatism of the Vilyui rift in Siberian craton was established. Based on this and comparison with detrital zircon populations from Paleozoic sandstones of northern Siberia, we reconstruct that the OM broke off from the northeastern part of the Siberian craton during the Silurian to Devonian and migrated southeast (in modern coordinates). A vast area of crustal extension and thinning in the Alazeya zone during the Jurassic-Cretaceous time has been reconstructed.
Skip Nav Destination
Article navigation
Research Article|
April 01, 2025
MAGMATISM OF THE OMOLON CRATONAL TERRANE (northeastern Russia): GEOCHRONOLOGY, GEOCHEMISTRY, AND GEODYNAMICS
V.V. Akinin;
1
North-East Interdisciplinary Science Research Institute, Far Eastern Branch of the Russian Academy of Sciences, ul. Portovaya 16, Magadan, 685000, Russia✉
E-mail: [email protected]
Search for other works by this author on:
G.O. Polzunenkov;
G.O. Polzunenkov
1
North-East Interdisciplinary Science Research Institute, Far Eastern Branch of the Russian Academy of Sciences, ul. Portovaya 16, Magadan, 685000, Russia
Search for other works by this author on:
A.V. Prokopiev;
A.V. Prokopiev
2
Diamond and Precious Metal Geology Institute, Siberian Branch of the Russian Academy of Sciences, pr. Lenina, 39, Yakutsk, 677007, Russian Federation
Search for other works by this author on:
E.A. Brusnitsyna
E.A. Brusnitsyna
2
Diamond and Precious Metal Geology Institute, Siberian Branch of the Russian Academy of Sciences, pr. Lenina, 39, Yakutsk, 677007, Russian Federation3
A.P. Karpinsky Russian Geological Research Institute, Sredny pr. 74, St. Petersburg, 199106, Russia
Search for other works by this author on:
1
North-East Interdisciplinary Science Research Institute, Far Eastern Branch of the Russian Academy of Sciences, ul. Portovaya 16, Magadan, 685000, Russia
G.O. Polzunenkov
1
North-East Interdisciplinary Science Research Institute, Far Eastern Branch of the Russian Academy of Sciences, ul. Portovaya 16, Magadan, 685000, Russia
A.V. Prokopiev
2
Diamond and Precious Metal Geology Institute, Siberian Branch of the Russian Academy of Sciences, pr. Lenina, 39, Yakutsk, 677007, Russian Federation
E.A. Brusnitsyna
2
Diamond and Precious Metal Geology Institute, Siberian Branch of the Russian Academy of Sciences, pr. Lenina, 39, Yakutsk, 677007, Russian Federation3
A.P. Karpinsky Russian Geological Research Institute, Sredny pr. 74, St. Petersburg, 199106, Russia✉
E-mail: [email protected]
Publisher: Novovsibirsk State University
Received:
17 Sep 2024
Accepted:
29 Nov 2024
First Online:
01 Mar 2025
Online ISSN: 1878-030X
Print ISSN: 1068-7971
© 2025, Novosibirsk State University
Novosibirsk State University
Russ. Geol. Geophys. (2025) 66 (4): 379–402.
Article history
Received:
17 Sep 2024
Accepted:
29 Nov 2024
First Online:
01 Mar 2025
Citation
V.V. Akinin, G.O. Polzunenkov, A.V. Prokopiev, E.A. Brusnitsyna; MAGMATISM OF THE OMOLON CRATONAL TERRANE (northeastern Russia): GEOCHRONOLOGY, GEOCHEMISTRY, AND GEODYNAMICS. Russ. Geol. Geophys. 2025;; 66 (4): 379–402. doi: https://doi.org/10.2113/RGG20244809
Download citation file:
You could not be signed in. Please check your email address / username and password and try again.
Email alerts
Index Terms/Descriptors
- absolute age
- alkaline earth metals
- Ar/Ar
- Asia
- Cenozoic
- Commonwealth of Independent States
- Cretaceous
- dates
- Devonian
- geochemistry
- gneisses
- ICP mass spectra
- igneous rocks
- ion probe data
- isotope ratios
- isotopes
- lead
- lithogeochemistry
- Lower Cretaceous
- Magadan Russian Federation
- mass spectra
- Mesozoic
- metals
- metamorphic rocks
- Miocene
- Nd-144/Nd-143
- neodymium
- Neogene
- nesosilicates
- Omolon Block
- Omolon River
- orthogneiss
- orthosilicates
- paleogeography
- Paleoproterozoic
- Paleozoic
- Pb-206/Pb-204
- Pb-207/Pb-204
- Pb-208/Pb-204
- plutonic rocks
- Precambrian
- Proterozoic
- radioactive isotopes
- rare earths
- Russian Federation
- SHRIMP data
- silicates
- Silurian
- spectra
- Sr-87/Sr-86
- stable isotopes
- strontium
- Tertiary
- thermal ionization mass spectra
- U/Pb
- upper Precambrian
- volcanic rocks
- zircon
- zircon group
Latitude & Longitude
Citing articles via
Related Articles
Related Book Content
Providencia Island: A Miocene Stratovolcano on the Lower Nicaraguan Rise, Western Caribbean—A Geological Enigma Resolved
Providencia Island: A Miocene Stratovolcano on the Lower Nicaraguan Rise, Western Caribbean—A Geological Enigma Resolved
Zircon petrochronology of Cretaceous Cordilleran interior granites of the Snake Range and Kern Mountains, Nevada, USA
Tectonic Evolution of the Sevier-Laramide Hinterland, Thrust Belt, and Foreland, and Postorogenic Slab Rollback (180–20 Ma)
New 40 Ar- 39 Ar ages and petrogenesis of the Massif d'Ambre volcano, northern Madagascar
Volcanism and Evolution of the African Lithosphere
The isotopic evolution of the Kohistan Ladakh arc from subduction initiation to continent arc collision
Himalayan Tectonics: A Modern Synthesis