Stable isotope (C, O, H) characteristics and genesis of the Tazheran brucite marbles and skarns, Olkhon region, Russia

Doroshkevich, A. G.; Sklyarov, E. V.; Старикова, А. Е.; Vasiliev, V. I.; Рипп, Г. С.; Избродин, И. А.; Посохов, В. Ф.

doi:10.1007/s00710-016-0477-8

Cited by 14 publications

(8 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Five samples are selected from contact zones of carbonate rocks with alkaline intrusives (Tazheran, Russia, and Hodzha-Achkan, Kyrgyzstan) (e.g. Doroshkevich et al, 2017;Pautov et al, 2013) and another five samples are from skarns of phlogopite deposits in Yakutia, Russia, (Katalakh, Emeldhak and Timpton) associated with granites (e.g. Mikhailov, 1997).…”

Section: Introductionmentioning

confidence: 99%

Major and trace element composition of olivine from magnesian skarns and silicate marbles

Nekrylov¹,

Plechov²,

Gritsenko

et al. 2021

American Mineralogist

View full text Add to dashboard Cite

Olivine is a major rock-forming mineral in various magmatic and metamorphic rocks and the upper mantle. In this paper, we present the first high-precision analyses of olivine from 15 samples of magnesian skarns and silicate marbles (MSSM) from the collection of the Fersman Mineralogical Museum (Moscow, Russia). Mg# [Mg/(Mg+Fe2+)·100, mol%] of olivine from the samples studied varies from 86 to nearly 100. The main distinctive features of the olivine are anomalously low contents of Co (<51 mg/g), Cr (<5 mg/g), and Ni (<44 mg/g) and high content of B (23–856 mg/g), which correlate with host-rock compositions. Phosphorus (5–377 mg/g) incorporation in olivine is charge balanced by the incorporation of Li (0.15–61 mg/g) and Na (<14.3 mg/g). Y and REE contents exhibit positive correlations with Na, which suggests that REE incorporation into MSSM olivine could occur via charge-balanced coupled substitution with Na at low temperature and low aSiO2 conditions during MSSM formation. The documented compositional features of olivine from magnesian skarns and silicate marbles can help reconstruct the genesis of the host-rocks and identify xenocrysts of MSSM olivine in magmatic rocks.

show abstract

Section: Introductionmentioning

confidence: 99%

Major and trace element composition of olivine from magnesian skarns and silicate marbles

Nekrylov¹,

Plechov²,

Gritsenko

et al. 2021

American Mineralogist

View full text Add to dashboard Cite

show abstract

“…За многолетнюю историю изучения метаморфических образований о. Ольхон и прилегающих территорий Западного побережья Байкала (Приольхонье) взгляды на их структуру и возраст претерпели серьезную трансформацию: от высокометаморфизованных раннедокембрийских осадочно-вулканогенных толщ, хорошо сохранивших первичную стратификацию [Pavlovsky, Eskin, 1964;Eskin et al, 1979;и др. ] до сложно построенных пакетов сдвиговых пластин разной природы с раннепалеозойским (500-460 млн лет) возрастом основных магматических и метаморфических событий Donskaya et al, 2017, и ссылки в этих работах].…”

Section: краткая геологическая характеристикаunclassified

“…Другой вариант этого типа меланжа обнаружен в пределах Тажеранского массива (рис. 13), детально охарактеризованного во многих публикациях [Konev, Samoilov, 1974;Sklyarov et al, 2009Sklyarov et al, , 2013а, 2021Fedorovsky et al, 2009Starikova et al, 2014;Doroshkevich et al, 2017]. Массив представляет собой сложную смесь сиенитов, нефелиновых сиенитов, в разной степени метаморфизованных габброидов двух типов (нормальной щелочности и субщелочных), бруситовых мраморов и разнообразных метасоматитов нескольких типов.…”

Section: инъекционно-минглинговый меланжunclassified

Marble Mélange: Composition Variations and Formation Mechanisms

Sklyarov

Лавренчук

Мазукабзов

2021

Geodin. tektonofiz.

View full text Add to dashboard Cite

The Olkhon terrane in the Western Baikal area accommodates four types of carbonate-silicate mixtures: injection (protrusion), metamorphic-boudinated, mingling, and tectonite marble mélange. The outcrops of injection mélange consist of a carbonate matrix with inclusions of native silicic rocks found in the immediate vicinities, commonly cover large areas and lack any distinct linearity in the map view. Mélange of the metamorphic boudinage type comprises diopsidite and tremilote-diopsidite fragments in a dolomitic or calcite-dolomitic matrix. Its origin is apparently due to tectonism and related metamorphism of quartz sandstones in Neoproterozoic strata on the passive margin of the Siberian craton. Mingling mélange appears as calcite marble or carbonate-silicate (calciphyre) veins with metadolerite and granite inclusions of different sizes. The veins formed by intrusion of carbonate and silicate melt batches and subsequent fragmentation of silicate rocks that crystallized earlier. Marble tectonites localized in narrow zones record the late phase of ductile marble injection.

show abstract

“…The influence of carbonate rocks on alkaline volcanics of the Roman province of Italy, which has a multi-kilometer (7-8 km) sedimentary carbonate strata at its basement, is especially actively discussed [13,14]. Recent studies of the Vitim, Sangilen, and Kuznetsk Alatau alkaline provinces also indicate an active interaction of magmas with the surrounding carbonate rocks [15][16][17][18][19]. However, the scale of these phenomena, the role of carbonatites in these processes, and, most importantly, the proportion of involved sedimentary carbonate component are still not estimated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Host Marble Rocks on the Formation of Intrusive Alkaline Rocks and Carbonatites of Sangilen (E. Siberia, Russia)

et al. 2021

View full text Add to dashboard Cite

The study of the O and C isotope composition of calcite from nepheline syenites, ijolites and carbonatites of the Chik intrusion and the intrusions of the Erzin–Tarbagatay group of Sangilen (Eastern Siberia, Russia) showed derivation from alkaline melts enriched with a carbonate component from the host marbleized sedimentary rocks. The calculations showed that about 40% of the initial mass of carbonates involved in the interaction with silicate melts have remained after decarbonation. During the assimilation of the carbonate, an oxygen isotope exchange took place between the residual carbonate material and the silicate phase. Crystallization products of such hybrid magmas are carbonatite veins, calcite-rich nepheline rocks and their pegmatites with a calcite core.

show abstract

Stable isotope (C, O, H) characteristics and genesis of the Tazheran brucite marbles and skarns, Olkhon region, Russia

Cited by 14 publications

References 54 publications

Major and trace element composition of olivine from magnesian skarns and silicate marbles

Major and trace element composition of olivine from magnesian skarns and silicate marbles

Marble Mélange: Composition Variations and Formation Mechanisms

Influence of Host Marble Rocks on the Formation of Intrusive Alkaline Rocks and Carbonatites of Sangilen (E. Siberia, Russia)

Contact Info

Product

Resources

About