Sm-Nd and Rb-Sr age of gabbroic rocks in the Dzhabyk Batholith, the Southern Urals

Osipova, T. A.; Тевелев, А. В.; Popov, V. S.; Belyatsky, B. V.

doi:10.1134/s1028334x08020190

Cited by 2 publications

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“…Соотношение изотопных характеристик Nd в гранитоидах и породах фундамента Южно-Уральской аккреционноколлизионной системы. 1-2 -гранитоиды Южного Урала: 1 -Магнитогорская мегазона, 2 -Восточно-Уральская зона [Osipova et al, 2008;Bea et al, 2005]; 3-4 -океанические базальты Южного Урала: 3 -N-MORB, 4 -E-MORB и OIB [Spadea et al, 2002]. Линия эволюции деплетированной мантии (DM) проведена по данным [Goldstein, Jacobsen, 1988] ( 143 Nd/ 144 Nd=0.513151, 147 Sm/ 144 Nd=0.2136), линия эволюции единого хондритового резервуара (CHUR) -по данным [Jacobsen, Wasserburg, 1984…”

Section: Discussionunclassified

“…Early Devonian igneous rocks include peridotitic protrusions occurring as olistostrome layers or lenses of edaphogenic breccias. Such protrusions bear chromite mineralization [Pavlov et al, 1968;Perevozchikov, 2011] in the Main Ural Fault and in Mugodzhar Hills on its southern extension at the junction of the Bashkirian uplift with the Kraka-Sakmar and Uraltau zones, which makes up one of world largest chromite provinces [Pavlov et al, 1968;Perevozchikov, 2011]. Judging by major-element, trace-element, and geodynamic signatures, chromites formed during selective melting of high-Ca boninites in a suprasubduction mantle wedge with participation of slab-derived aqueous fluids [Melcher et al, 1999;Perevozchikov, 2011].…”

Section: Island Arc Volcanismmentioning

confidence: 99%

“…Sm-Nd isotope systematics of granitoids and basement rocks in the South Ural accretionary-collisional system. 1, 2 -granitoids of South Urals: Magnitogorsk (1) and East Ural (2) zones[Osipova et al, 2008; Bea et al, 2005]; 3, 4 -oceanic basalts of South Urals: N-MORB (3), E-MORB and OIB (4)[Spadea et al, 2002]. The trends of depleted mantle (DM) and chondrite uniform reservoir (CHUR) are according to[Goldstein, Jacobsen, 1988] ( 143 Nd/ 144 Nd -0.513151, 147 Sm/ 144 Nd -0.2136) and[Jacobsen, Wasserburg, 1984] ( 143 Nd/ 144 Nd -0.512638, 147 Sm/ 144 Nd -0.1967), respectively.…”

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Devonian-Carboniferous Magmatism and Metallogeny in the South Ural Accretionary-Collisional System

Kosarev

Владимиров

Ханчук

et al. 2021

Geodin. tektonofiz.

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The oceanic stage in the history of the South Urals completed in the Ordovician – Early Silurian. The Ordovician through Devonian events in the region included the formation of an island arc in the East Ural zone from the Middle Ordovician to Silurian; westward motion of the subduction zone in the Late Silurian – Early Devonian and the origin of a trench along the Main Ural Fault and the Uraltau Uplift; volcanic eruptions and intrusions in the Magnitogorsk island arc system in the Devonian. The Middle-Late Paleozoic geodynamic evolution of uralides and altaides consisted in successive alternation of subduction and collisional settings at the continent-ocean transition. The greatest portion of volcanism in the major Magnitogorsk zone was associated with subduction and correlated in age and patterns of massive sulfide mineralization (VMS) with Early – Middle Devonian ore-forming events in Rudny Altai. Within-plate volcanism at the onset of volcanic cycles records the Early (D1e2) and Middle (D2ef2) Devonian slab break off. The volcanic cycles produced, respectively, the Buribay and Upper Tanalyk complexes with VMS mineralization in the Late Emsian; the Karamalytash complex and its age equivalents in the Late Eifelian – Early Givetian, as well as the lower Ulutau Formation in the Givetian. Slab break off in the Late Devonian – Early Carboniferous obstructed the Magnitogorsk island arc and supported asthenospheric diapirism. A new subduction zone dipping westward and the Aleksandrovka island arc formed in the Late Devonian – Early Carboniferous. The Early Carboniferous collision and another event of obstructed subduction led to a transform margin setting corresponding to postcollisional relative sliding of plates that produced another slab tear. Postcollisional magmatism appears as alkaline gabbro-granitic intrusives with related rich Ti-magnetite mineralization (C1). Transform faulting persisted in the Middle Carboniferous through Permian, when the continent of Eurasia completed its consolidation. The respective metallogenic events included formation of Cu-Ni picritic dolerites (C2–3), as well as large-scale gold and Mo-W deposits in granites (P1–2).

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Section: Island Arc Volcanismmentioning

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Devonian-Carboniferous Magmatism and Metallogeny in the South Ural Accretionary-Collisional System

Kosarev

Владимиров

Ханчук

et al. 2021

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Paleozoic Granitoid Magmatism of the Urals: The Reflection of the Stages of the Geodynamic and Geochemical Evolution of a Collisional Orogen

Kholodnov

Шардакова

Puchkov

et al. 2021

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The Ural mobile belt is an intracontinental epioceanic orogen that has already gone through all stages of the geodynamic development. Igneous rocks formed during each stage are important indicators for understanding the evolution of this belt and determining potential ore contents of its segments. We consolidated large datasets on petrogeochemistry and isotope geochronology of the Paleozoic (490–250 Ma) granitoids associated with the opening and evolution of the Ural paleoocean and the subsequent formation of the collisional orogen. Using these data, we have revised the ages of several tectono-magmatic events, clarified the paleogeodynamic settings for the generation of granitoids of different compositions, and described the roles of mantle-crust interactions and the plume factor in the formation of the mature continental crust in the study area. The results can be useful for geological mapping and improving the assessment of the potential ore contents in granitoid complexes that differ in origin and composition.

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Sm-Nd and Rb-Sr age of gabbroic rocks in the Dzhabyk Batholith, the Southern Urals

Cited by 2 publications

References 3 publications

Devonian-Carboniferous Magmatism and Metallogeny in the South Ural Accretionary-Collisional System

Devonian-Carboniferous Magmatism and Metallogeny in the South Ural Accretionary-Collisional System

Paleozoic Granitoid Magmatism of the Urals: The Reflection of the Stages of the Geodynamic and Geochemical Evolution of a Collisional Orogen

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