Bol’shakovskii gabbro massif as a fragment of the Southern Urals zone of Early Carboniferous rift

Snachyov, A. V.; Пучков, В. Н.; Snachyov, V. I.; Савельев, Д. Е.; Bazhin, E. A.

doi:10.1134/s1028334x09080066

Dokl. Earth Sc.

2009

DOI: 10.1134/s1028334x09080066

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Bol’shakovskii gabbro massif as a fragment of the Southern Urals zone of Early Carboniferous rift

A. V. Snachyov

В. Н. Пучков

V. I. Snachyov

et al.

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Cited by 6 publications

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“…The obtained data are in agreement with V.I Puchkov's suggestion (Puchkov, 2017) about the existence of the independent Silurian Transuralian subduction zone in the east of the Southern Urals. 3) and gabbroids of different formations of the Southern Urals (I, gabbro-granite; II, dunite-clinopyroxenite-gabbro; III, dunite-harzburgite); after (Snachev et al;.…”

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confidence: 99%

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The Physicochemical and Geodynamic Conditions of Formation of the Sarsangi Complex in the Boundary Zone between the Middle and Southern Urals

Snachev

Puzhakov³

et al. 2021

Moscow Univ. Geol. Bull.

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This article describes the geological structure of the Sarsangi gabbro-diorite-plagiogranite complex located in the boundary zone between the Middle and South Urals. The formation of its massifs took place in the Late Silurian in the abyssal zone at approximately 6.5-7.0 km. The temperature ranges of crystallization of granodiorites and gabbro were 900-990°С and 1180-1280°С, respectively. The pressure in the system at that time was 190-200 MPa. Gabbroids in the massifs were formed under conditions of extension of the oceanic crust. In terms of petrogeochemistry, they correspond to rocks that compose the basement of island arcs and belong to the ophiolite formation.

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mentioning

confidence: 99%

“…5. The (Na 2 O + K 2 O)-TiO 2 (wt %) plot for gabbro of the Sarsangi massif (Table3) and gabbroids of different formations of the Southern Urals (I, gabbro-granite; II, dunite-clinopyroxenite-gabbro; III, dunite-harzburgite); after(Snachev et al;.…”

mentioning

confidence: 99%

The Physicochemical and Geodynamic Conditions of Formation of the Sarsangi Complex in the Boundary Zone between the Middle and Southern Urals

Snachev

Puzhakov³

et al. 2021

Moscow Univ. Geol. Bull.

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Petrochemical Features and Geodynamic Conditions for the Formation of Basalts of the Dzhusinsko-Dombarovsky Belt (South Urals)

Рыкус

Snachev

2022

NGD

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Geology, physical-chemical and geodynamic conditions for the formation of Sokolovsk and Krasnokamensk granitoid massifs (South Ural)

Snachev

Puzhakov³

2021

Georesursy

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The article describes the geological structure of the Sokolovsk and Krasnokamensk massifs located in the central part of the Western subzone of the Chelyabinsk-Adamovka zone of the Southern Urals. They are of Lower Carboniferous age and break through the volcanogenic-sedimentary deposits of the Krasnokamensk (D3kr) and Bulatovo (S1-D1bl) strata. It was found that these intrusions belong to the gabbro-syenite complex and are composed of gabbroids (phase I) and syenites, quartz monzonites, less often monzodiorites (phase II). The rocks of the second phase predominate (90–95%). Gabbros belong to the normal alkaline series of the sodium series and are close to tholeiitic mafic rocks, the formation of which is associated with riftogenic structures; syenites correspond to moderately alkaline series with K-Na type of alkalinity. It has been proved that in terms of their petrographic, petrochemical, geochemical, and metallogenic features (content of TiO2, K2O, Na2O, Rb, Sr, distribution of REE, the presence of skarn-magnetic mineralization), the rocks of the massifs under consideration undoubtedly belong to the gabbro-granite formation. Crystallization of the Sokolovsk and Krasnokamensk intrusions occurred at a temperature of 880–930 °С in the mesoabyssal zone at a depth of about 7–8 km (P = 2.2–2.4 kbar). At the postmagmatic stage, the transformation parameters of the initially igneous rocks were, respectively, T = 730–770 °C, P = 4.0–4.2 kbar. The fact that these massifs belong to the gabbro-granite formation makes it possible to include them, together with Bolshakovsk, Klyuchevsky, Kurtmaksky and Kambulatovo, into the Chelyabinsk-Adamovka segment of the South Ural Early Carboniferous rift system.

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Bol’shakovskii gabbro massif as a fragment of the Southern Urals zone of Early Carboniferous rift

Cited by 6 publications

References 0 publications

The Physicochemical and Geodynamic Conditions of Formation of the Sarsangi Complex in the Boundary Zone between the Middle and Southern Urals

The Physicochemical and Geodynamic Conditions of Formation of the Sarsangi Complex in the Boundary Zone between the Middle and Southern Urals

Petrochemical Features and Geodynamic Conditions for the Formation of Basalts of the Dzhusinsko-Dombarovsky Belt (South Urals)

Geology, physical-chemical and geodynamic conditions for the formation of Sokolovsk and Krasnokamensk granitoid massifs (South Ural)

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