Petrology of alkaline silicate rocks and carbonatites of the Chuktukon massif, Chadobets upland, Russia: Sources, evolution and relation to the Triassic Siberian LIP

Doroshkevich, A. G.; Chebotarev, Dmitry A.; Sharygin, Victor V.; Prokopyev, Ilya; Nikolenko, Anna M.

doi:10.1016/j.lithos.2019.03.006

Cited by 32 publications

(47 citation statements)

References 70 publications

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“…Structural formula is given in Table 5. Similar barium-rich micas are typical of some kimberlites [10] and also occurred in some carbonatite complexes, for example, in the Guli massif from the Maymecha-Kotuy province [11] and in the Chuktukon massif from the Chadobets upland in Russia [12], the Palabora Carbonatite Complex, South Africa [13] and in the metasomatized mantle xenoliths [14].…”

Section: Resultsmentioning

confidence: 56%

Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India

et al. 2021

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The main mass of the Sevathur carbonatite complex (Tamil Nadu, India) consists of dolomite carbonatite with a small number of ankerite carbonatite dikes. Calcite carbonatite occurs in a very minor amount as thin veins within the dolomite carbonatite. The age (207Pb/204Pb) of the Sevathur carbonatites is 801 ± 11 Ma, they are emplaced within the Precambrian granulite terrains along NE–SW trending fault systems. Minor minerals in dolomite carbonatite are fluorapatite, phlogopite (with a kinoshitalite component), amphibole and magnetite. Pyrochlore (rich in UO2), monazite-Ce, and barite are accessory minerals. Dolomite carbonatite at the Sevathur complex contains norsethite, calcioburbankite, and benstonite as inclusions in primary calcite and are interpreted as primary minerals. They are indicative of Na, Sr, Mg, Ba, and LREE enrichment in their parental carbonatitic magma. Norsethite, calcioburbankite, and benstonite have not been previously known at Sevathur. The hydrothermal processes at the Sevathur carbonatites lead to alteration of pyrochlore into hydropyrochlore, and Ba-enrichment. Also, it leads to formation of monazite-(Ce) and barite-II.

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Section: Resultsmentioning

confidence: 56%

Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India

et al. 2021

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“…Within the Irkineeva-Chadobets Trough, in addition to the Chadobets complex (which includes the Terina complex) formed in the post-trap period, there is another UML complex: Ilbokich (Figure 1), which is a product of pre-trap magmatism. Detailed studies of the isotopic characteristics of these complexes showed that the melts had a predominant moderately depleted mantle source with the addition of the material from the SCLM [31,32]. It was concluded that the SCLM source involved in the magma generation of the complexes changed over time.…”

Section: Genetic Relationship Between Olivine Macrocrysts and Umlsmentioning

confidence: 99%

“…Emplacement of the Chadobets alkaline rocks includes several stages of the intrusion of aillikites, mela-aillikites, carbonatites, and damtjernites. The crystallization of the rocks has been related to the Permian-Triassic Siberian plume activity forming the Siberian large igneous province (LIP), and the Chadobets UML-carbonatite complex was intruded in the southern part of the Siberian plume activity (Figure 1a) [30][31][32][33][34]. The dates for the Chadobets rocks are 256.7 ± 1.1 Ma and 252 ± 12 Ma (zircon from damtjernite, and perovskite from aillikite, respectively, U-Pb, Chuktukon complex) [31,33], 243.4 ± 3.1 and 241 ± 1 Ma (Ar-Ar, phlogopite, and Rb-Sr, respectively, aillikites from Terina complex) [32], and 231 ± 2.7 Ma (rippite, Ar-Ar, Chuktukon carbonatites) [31].…”

Section: Geological Settingmentioning

confidence: 99%

“…(b) Geological map of the Chadobets ultramafic lamprophyre (UML)carbonatite complex [27,34]. (c) Location of the Devonian Ilbokich complex within the Angara-Kotuy rift system [27,31].…”

Section: Geological Settingmentioning

confidence: 99%

“…As group I kimberlites, they are igneous rocks with a deep mantle source, which do not bear significant signs of assimilation of crustal material captured during the rise of the melt [1][2][3]. Like kimberlites, they are significantly depleted in SiO 2 (18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) wt% SiO 2 ) and are characterized by a high total content of magmatic carbonates [4][5][6]. A distinctive feature of aillikites is their higher Fe content (compared to kimberlites) [7].…”

Section: Introductionmentioning

confidence: 99%

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Polygenic Nature of Olivines from the Ultramafic Lamprophyres of the Terina Complex (Chadobets Upland, Siberian Platform) Based on Trace Element Composition, Crystalline, and Melt Inclusion Data

et al. 2021

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Olivine from the deep mantle-derived rocks, such as ultramafic lamprophyres, carries important information about the composition of the mantle source, the processes of mantle metasomatism, the origin of specific silicate-carbonate melts, as well as the composition and mechanisms of crystallization of these rocks. Textures and compositions of olivine from the carbonate-rich ultramafic lamprophyres (aillikites) of the Terina complex, along with their mineral and melt inclusions, exposed that olivines have different sources. Two populations of olivines were considered: macrocrysts (>1 mm) and groundmass olivines (<1 mm). Groundmass olivines are phenocrysts and characterized by weak variations in Mg# (84–86.5), a sharp increase in Ca and Ti contents, and a decrease in Ni and Cr from core to rim. They have higher concentrations of Li, Cu, Ti, and Na compared to macrocrysts. Among the macrocrysts, the following populations are observed: (1) high-Mg olivines (Mg# 89–91) with high Ni and low Ti contents, which are interpreted as xenocrysts from the slightly depleted lherzolite mantle; (2) high-Ca olivines (Mg# 84–88, CaO 0.13–0.21 wt %), which have patterns similar to groundmass olivines and are interpreted as cumulates of early portions of aillikite melt; (3) macrocrysts with wide variations in Mg# (73–88), low CaO contents (0.04–0.11 wt %), and positive slope in Ca vs. Al and negative slope in Ca vs. Mn, which are interpreted as disintegrated megacrysts from the Cr-poor megacryst suite. The megacryst suite could have been formed in the pre-trap period during the melting of the metasomatized subcontinental lithospheric mantle (SCLM). The aillikite melt evolution is traced by secondary melt inclusions in olivine macrocrysts: early phlogopite-diopside-calcite-apatite association, containing Ti-magnetite and ilmenite, is followed by an association with magnetite and sulfides (pyrrhotite and pentlandite); finally, at a late stage, inclusions with a predominance of Ca-Na-carbonates and sulfates and enriched in U, Th, Y, REEs, Sr, and Ba were captured.

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Raman spectroscopic study of non‐stoichiometry in cerianite from critical zone

Zhukova

Stepanov

Malyutina

et al. 2023

J Raman Spectroscopy

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Cerianite (CeO2) is one of the key minerals controlling the behavior of rare earth elements (REE) in supergene environment, yet little is known about the composition and structure of the mineral. We present Raman spectroscopy and compositional data on regolith cerianite from carbonatite‐related supergene REE deposits. Cerianite showed a low content of impurities, distinguishing from high‐temperature environments, where the mineral is characterized by elevated concentrations of lanthanides other than Ce. The Raman spectra are characterized by the shift of the dominant peak located at 464–465 cm−1 in stoichiometric CeO2 to the lower wavenumbers of 450–455 cm−1, the widening of this peak with the increasing shift, and the presence of additional peaks at 225–230, 284, and 604–613 cm−1. The independence of the main spectral characteristics from the laser wavelength (tested by three lasers: 488, 532, and 633 nm) suggests that the features are genuine and not produced by REE luminescence. The anhydrous composition of supergene cerianite is indicated by the absence of Raman bands in the water‐bearing region of the spectra (2700–3200 cm−1). The spectral features of supergene cerianite, combined with the compositional data, suggest non‐stoichiometry in the mineral and the presence of Ce3+ with oxygen vacancies in the mineral structure. Our observations demonstrate the efficiency of Raman spectroscopy for the identification of the non‐stoichiometric composition of cerianite and its common occurrence in the critical zone.

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Petrology of alkaline silicate rocks and carbonatites of the Chuktukon massif, Chadobets upland, Russia: Sources, evolution and relation to the Triassic Siberian LIP

Cited by 32 publications

References 70 publications

Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India

Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India

Polygenic Nature of Olivines from the Ultramafic Lamprophyres of the Terina Complex (Chadobets Upland, Siberian Platform) Based on Trace Element Composition, Crystalline, and Melt Inclusion Data

Raman spectroscopic study of non‐stoichiometry in cerianite from critical zone

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