Geochronology of the Dovyren intrusive complex, northwestern Baikal area, Russia, in the Neoproterozoic

Ariskin, A. A.; Kostitsyn, Yu. A.; Konnikov, E. G.; Danyushevsky, Leonid V.; Meffre, Sébastien; Nikolaev, G. S.; McNeill, Andrew W.; Kislov, E. V.; Orsoev, D. A.

doi:10.1134/s0016702913110025

Cited by 55 publications

(12 citation statements)

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“…Some features of rock geochemistry are shown in Figure 4a ranges (800-1600 and 200-10,000 ppm, respectively). The rocks are characterized by variable but high Al2O3/TiO2 (17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35).…”

Section: Bulk-rock Geochemistrymentioning

confidence: 99%

“…In southern Siberia, Precambrian ultramafic complexes are represented by Neoproterozoic dunite-peridotite-pyroxenite-gabbro intrusions in the mobile belts surrounding the Siberian craton and Meso-and Paleoproterozoic plagioperidotite-gabbroic intrusions in the Sharyzhalgai uplift of the Siberian craton basement [19]. In the western Baikal region, there is a Neoproterozoic Ioko-Dovyren mafic-ultramafic pluton [20] in the Olokit zone on the Siberian cratonic margin to the north of Lake Baikal. In addition, ultramafic intrusions in this region are localized in structures of the southwestern part of the Baikal cratonic basement uplift (Figure 1a).…”

Section: Introductionmentioning

confidence: 99%

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Compositional Variations of Cr-Spinel in High-Mg Intrusions of the Primorsky Ridge (Western Baikal Region, Russia)

et al. 2020

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Composition variations of Cr-spinel in high-Mg rocks of the Primorsky Ridge (Western Baikal region, Russia) are reported here. A specific feature of Cr-spinels in ultramafic rocks of the Primorsky Ridge is their noticeably high Ti content (up to 6.5 wt.%) compared to spinels in mantle peridotites. The presence of high TiO2 content in Cr-spinels enclosed in olivine crystals may be a clear indication of the primary magmatic nature of Ti enrichment. Two types of Cr-spinel were identified in ultramafic rocks from all intrusions. Cr-spinels of Type I are enclosed in the inner part of olivine crystals and are homogeneous Al-rich chromites and Fe2+-rich chromites. They are characterized by variable content of TiO2 (1.0–5.3 wt.%), moderately high Cr# (0.7–0.83), and low Fe3+# (0.20–0.34). Cr-spinels of type II occur in the interstitial space and occur as homogeneous and zoned grains with Al-rich chromite and Fe2+-rich chromite cores. Al-rich chromite cores have a composition similar to that of the Cr-spinel enclosed in olivine crystals. Fe2+-rich chromite cores have relatively high MgO (3.8–6.2 wt.%), Al2O3 (8–9 wt.%), and TiO2 (2.6–2.8 wt.%) content, low MnO (0.34–0.52 wt.%) content, and a low Fe3+# (0.25–0.27) ratio.

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Section: Bulk-rock Geochemistrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compositional Variations of Cr-Spinel in High-Mg Intrusions of the Primorsky Ridge (Western Baikal Region, Russia)

et al. 2020

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“…Мощность 1500-2000 м. Бимодальный внутриплитный магматизм Сыннырского рифта охарактеризован цифрами абсолютного возраста (U-Pb метод по циркону): калиевые риолиты, секущие базальты -711 млн лет, базальты -729 млн лет [Rytsk et al, 2002], кварцевые порфиры -729 млн лет [Ariskin et al, 2013]. Эти значения практически совпадают с возрастом кристаллизации Йоко-Довыренского дунит-троктолит-габбрового массива -728.4±3.4 и 733 млн лет [Ariskin et al, 2013;Orsoev et al, 2018]. Йоко-Довыренский массив является типичным расслоенным плутоном [Gurulev, 1983].…”

Section: Fig 14unclassified

“…Состав родоначальной магмы Йоко-Довыренского массива отвечает высокомагнезиальному, низкотитанистому пикритобазальту нормальной щелочности. На спайдер-диаграммах [Sun, McDonough, 1989] все типы пород имеют одинаковую конфигурацию спектров, включая обогащенность крупноионными элементами -Rb, Ba, Th, U с максимумом Nd и Pb, минимумом по Ta, Nb, Sr и P, с небольшим обеднением Ti и незначительным содержанием Zr и Y. Родоначальный высокомагнезиальный расплав свидетельствует о высоком тепловом потоке, вероятно, обусловленном существованием в этот период мантийного плюма, что подтверждается ювенильным источником с положительными величинами Ɛ Nd (T) и позднеархейским модельным возрастом T Nd (DM) протолита (2.7-2.8 млрд лет) [Ariskin et al, 2013;Orsoev et al, 2018]. Полученные датировки для вулканитов и интрузивных пород довыренского комплекса свидетельствуют в пользу синхронности проявления иняптукско-сыннырской фазы вулканизма и мантийных (плюмовых) процессов при формировании Йоко-Довыренского массива, которые сопровождали раскрытие Сыннырского рифта в задуговой области Нюрундюканской островной дуги.…”

Section: Fig 14unclassified

Relationship Between Subduction‐related and Plume Magmatism at the Active Boundaries of Lithospheric Plates in the Interaction Zone of the Siberian Continent and Paleoasian Ocean in the Neoproterozoic and Paleozoic

Гордиенко

2019

Geodin. tektonofiz.

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This paper is focused on the relationship between plate-and plume-tectonic processes during the formation of Neoproterozoic and Vendian-Paleozoic island-arc systems and active continental margins in the interaction zone of the Siberian continent and Paleoasian Ocean (PAO). In this study, we use our own materials collected in the long-term research of the Central Asian Orogenic Belt (CAOB) and the published models showing convection in the asthenosphere and mantle, subduction-related and plume magmatism at the Cenozoic active margins of the Western Pacific and California types. It is clearly shown that subduction-related magmatism of the Paleoasian Ocean active margins should not be considered separately from plume magmatism. These interrelated processes played a major role in the CAOB formation. Based on the reconstructed Neoproterozoic, Vendian-Early and Middle Paleozoic paleogeodynamic features, 25 island-arc systems of PAO are characterized. These island arcs are related to the occurrence of more than 30 plume magmatism areas. At the active margin of the Siberian continent, there are numerous fields of intraplate magmatism in riftogeneous structures. Such fields of various scales not related to subduction zones, especially at the final Late Paleozoic stage. All the major stages of the CAOB development, including the Cambrian-Ordovician collision stage, are clearly correlated with plume magmatism. Considering a revealed combination of the island arcs and the plume magmatism areas, there are grounds to suggest that the development of the entire Neoproterozoic-Paleozoic region of Central Asia was related to the activity of mantle plumes.

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“…The Neoproterozoic Franklin LIP spans >2500 km, extending from Siberia to Greenland (Heaman et al, 1992;Pehrsson & Buchan, 1999;Shellnutt et al, 2004;Denyszyn et al, 2009;Bédard et al, 2012;Ariskin et al, 2013) (Fig. 1).…”

Section: Geological Settingmentioning

confidence: 99%

Geochemistry and origin of the Neoproterozoic Natkusiak Flood Basalts and related Franklin Sills, Victoria Island, Arctic Canada

Beard¹,

Scoates²,

Weis³

et al. 2018

Preprint

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ABSTRACTlacked correspondingly high Lu/Hf. We suggest that the source region for the southwestern Natkusiak basalts and related sills included isotopically matured oceanic crust, which was recycled through the asthenospheric mantle into a laterally heterogeneous plume. The distinct trace element signatures of the southern and northern sources became attenuated with the onset of voluminous melting (corresponding to emplacement of the Type 2 doleritic sills and sheet flow basalts) and may reflect contributions from hydrous eclogitic material emplaced into the lithospheric mantle during the ca. 1.9 Ga Wopmay Orogeny. As both the northern and southern volcanic rocks exhibit contrasting isotopic signatures throughout the preserved stratigraphy, the magma plumbing system must have experienced limited lateral mixing and homogenisation, which allowed for the expression of distinct mantle source signatures in the high-level sills and basaltic lavas.

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Geochronology of the Dovyren intrusive complex, northwestern Baikal area, Russia, in the Neoproterozoic

Cited by 55 publications

References 11 publications

Compositional Variations of Cr-Spinel in High-Mg Intrusions of the Primorsky Ridge (Western Baikal Region, Russia)

Compositional Variations of Cr-Spinel in High-Mg Intrusions of the Primorsky Ridge (Western Baikal Region, Russia)

Relationship Between Subduction‐related and Plume Magmatism at the Active Boundaries of Lithospheric Plates in the Interaction Zone of the Siberian Continent and Paleoasian Ocean in the Neoproterozoic and Paleozoic

Geochemistry and origin of the Neoproterozoic Natkusiak Flood Basalts and related Franklin Sills, Victoria Island, Arctic Canada

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