Bimodal intraplate magmatism of the Yenisei ridge as evidence of breakup of Rodinia and opening of the Paleoasian Ocean at the western margin of the Siberian Craton

2017 ◽  
Vol 476 (2) ◽  
pp. 1217-1221
Author(s):  
I. I. Likhanov ◽  
V. V. Reverdatto ◽  
K. A. Savko
Keyword(s):  
Siberian Craton ◽  
Yenisei Ridge ◽  
Paleoasian Ocean ◽  
Western Margin ◽  
Intraplate Magmatism

scholarly journals The first petrological evidence of subduction at the western margin of the Siberian сraton

2019 ◽  
Vol 484 (2) ◽  
pp. 209-214
Author(s):  
I, I, Likhanov ◽  
P. S. Kozlov ◽  
K. A. Savko ◽  
S. V. Zinoviev ◽  
A. A. Krylov
Keyword(s):  
High Pressure ◽  
Continental Margin ◽  
Siberian Craton ◽  
Early Stage ◽  
Yenisei Ridge ◽  
Paleoasian Ocean ◽  
Western Margin ◽  
History Of ◽  
Western Side ◽  
Two Stages

The discovery of relics of glaucophane schist in high-pressure tectonites of the suture zone of Yenisei Ridge has provided evidence for a Cordillera-type convergent boundary controlled by subduction of the oceanic crust beneath the continental margin on the western side of the Siberian Craton. According to the microtextural patterns of rocks and the results of geothermobarometry, two stages of metamorphism were distinguished. The formation of high-pressure tectonites indicates the early stage in the evolution of the Paleoasian Ocean and the final stage in the Neoproterozoic history of the Yenisei Ridge including completion of the accretion–subduction processes on the western margin of the Siberian Craton.

scholarly journals First data on the nature and age of the protolith of high-pressure tectonites of Yenisei ridge: a link to the early stage of formation of the Paleoasian Ocean

2019 ◽  
Vol 484 (6) ◽  
pp. 739-744
Author(s):  
I. I. Likhanov ◽  
K. A. Savko
Keyword(s):  
High Pressure ◽  
Chemical Composition ◽  
Siberian Craton ◽  
Early Stage ◽  
Suture Zone ◽  
Yenisei Ridge ◽  
Paleoasian Ocean ◽  
Western Margin ◽  
Enriched Mantle ◽  
Depleted Mantle

The petrogeochemical characteristics of high-pressure mafic tectonites from the Yenisei suture zone of Yenisei Ridge indicate that N-MORB and E-MORB with an age of 701.6 ± 8.4 Ma were their protolith. The formation of N-MORB with the more primitive chemical composition occurred at the initial stages of spreading, when the upper horizons of the depleted mantle were molten. The high-Ti basalt was formed as the product of melting of the enriched mantle substrate at the later stages of spreading. These events are related to the early stage in the evolution of the Paleo-Asian Ocean on the western margin of the Siberian Craton.

Grenville tectonic events and evolution of the Yenisei Ridge at the western margin of the Siberian Craton

Geotectonics ◽  
2014 ◽  
Vol 48 (5) ◽  
pp. 371-389 ◽  
Author(s):  
I. I. Likhanov ◽  
A. D. Nozhkin ◽  
V. V. Reverdatto ◽  
P. S. Kozlov
Keyword(s):  
Siberian Craton ◽  
Yenisei Ridge ◽  
Western Margin ◽  
Tectonic Events

scholarly journals The first U-Pb (SHRIMP-II) evidence of the Franklin tectonic event at the western margin of the Siberian craton

2019 ◽  
Vol 486 (5) ◽  
pp. 567-571
Author(s):  
I. I. Likhanov ◽  
V. V. Reverdatto
Keyword(s):  
Siberian Craton ◽  
The Arctic ◽  
Spatial Proximity ◽  
Tectonic Event ◽  
Zircon Age ◽  
Western Margin ◽  
The North ◽  
Intraplate Magmatism ◽  
High Concentrations ◽  
Geochronological Evidence

Geochemical and isotope-geochronological evidence of the manifestation of Late Riphean intraplate magmatism within the Chernorechensky massif at the western margin of the Siberian craton were obtained. These rocks crystallized from high-temperature and anhydrous (water unsaturated) magmas with high concentrations of alkalis, iron, and, mostly incompatible elements, which is typical for anorogenic A-type granites in intraplate extension setting. Their U-Pb zircon age 723 ± 6 Ma can be correlated with the Franklin rift event widely manifested in the north of Laurentia, associated with the breakup of Rodinia. The synchronous successions and similar style of magmatic activity and concomitant rifting, as well as a similar sequence of tectonic-thermal events along the Arctic margin of Rodinia support the spatial proximity of Siberia and the North Atlantic cratons at this time as proposed for the paleogeographic reconstructions.

Chapter 10: Olympiada Gold Deposit, Yenisei Ridge, Russia

2020 ◽  
pp. 203-226
Author(s):  
A. M. Sazonov ◽  
K. V. Lobanov ◽  
E. A. Zvyagina ◽  
S. I. Leontiev ◽  
S. A. Silyanov ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Gold Mineralization ◽  
Sedimentary Rocks ◽  
Gold Deposits ◽  
Yenisei Ridge ◽  
Structural Factors ◽  
Tectonic Zone ◽  
Central Siberia ◽  
Western Margin ◽  
Clastic Sedimentary

Abstract The Olympiada deposit, containing >1,560 metric tons (t; 50 Moz) of gold at an average grade of 4 to 4.6 g/t Au, occurs in central Siberia, Russia. Over 30 years, the deposit produced more than 580 t of gold, including 200 t from oxidized ore grading 11.1 g/t. The deposit forms a 2-km-long, steeply dipping system, which is traced downdip for 1.7 km. It occurs in the Neoproterozoic orogen of the Yenisei Ridge at the western margin of the Siberian craton. This and other gold deposits in the district are controlled by the large, long-lived Tatarka-Ishimbino tectonic zone, marking a suture between terranes chiefly consisting of deformed Meso- to Neoproterozoic carbonate-clastic sedimentary rocks. The combination of lithologic and structural factors was critical for localization of gold mineralization associated with calcic and siliceous alteration accompanied by early arsenic and late antimony sulfides. As a result, very fine (10 μm) and high fineness (910–997) gold associates with diverse sulfides, especially arsenopyrite, and commonly contains mercury, similar to some characteristics of Carlin-type deposits. Geochronologic studies suggest that mineralization was formed during several stages between 817 and 660 Ma. The isotopic composition of Os and He, along with presence of anomalous Ni, Co, and Pt, points to a mantle mafic source, whereas isotopic composition of Pb and S suggest a contaminated crustal source, i.e., originating from a mix of mantle and crustal fluids.

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