Mineralogy of secondary olivine-hosted inclusions in calcite carbonatites of the Belaya Zima alkaline complex, Eastern Sayan, Russia: Evidence for late-magmatic Na-Ca-rich carbonate composition

Victor V. Sharygin, Anna G. Doroshkevich

Результат исследования: Научные публикации в периодических изданияхстатья

2 Цитирования (Scopus)

Аннотация

Secondary multiphase inclusions were studied in olivine from olivine-pyrochlore varieties of calcite carbonatites of the Belaya Zima alkaline complex, Eastern Sayan, Siberia, Russia. The inclusions form trails cross-cutting the host olivine. Their composition varies from carbonate to silicate-carbonate species. Multiphase silicate-carbonate inclusions contain Na-Ca-carbonates (shortite, nyerereite), Na-Mg-carbonates (northupite, eitelite, bradleyite), common carbonates (calcite, dolomite), Ba-Sr-rich carbonates (olekminskite, burbankite, strontianite), tetraferriphlogopite, magnetite, humite-clinohumite and other mineral phases. Na-Ca-carbonates, tetraferriphlogopite, humiteclinohumite and magnetite are omnipresent and dominant phases within the inclusions. The phase composition of secondary olivinehosted inclusions seems to reflect evolutionary features for the Belaya Zima carbonatites at their late stages of formation. During crystallization calciocarbonatite melt gradually evolved toward enrichment in alkalis (mainly, in sodium) and volatile components (Cl, F and H2O).

Язык оригиналаанглийский
Страницы (с-по)524-530
Число страниц7
ЖурналJournal of the Geological Society of India
Том90
Номер выпуска5
DOI
СостояниеОпубликовано - 1 ноя 2017

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