Chrome spinels from diamondiferous tuffites of the Bulkur anticline (the North-Eastern Siberian platform)

Хромшпинелиды алмазоносных туффитов Булкурской антиклинали (северо-восток Сибирской платформы)
Chrome spinels from diamondiferous tuffites of the Bulkur anticline (the North-Eastern Siberian platform)
Статья в журнале
Русский
Библиогр.: с. 49 (8 назв.)
549.02(571.56)
хромшпинелиды; включения в хромшпинелидах; туффиты; Булкурская антиклиналь; chrome spinels; inclusions in chrome spinels; tuffites; Bulkur antikline
Геология / Минералогия
Наука и образование. – 2017. – N 4 (88), октябрь-декабрь
С. 44-49
Наука и образование
Якутск, Академия наук Республики Саха (Якутия)
2073-8129 (print)
A comparative analysis of the chemical composition of spinel macrocrystals from the concentrate of diamondiferous tuffites basal horizon and spinel microcrystallites from the binder mass of lapilli with those from kimberlite pipes of Yakutia is made for determining specific features of the medium transporting these rocks to the surface. It is established that most of chrome spinels belong to high and medium-chromium picrochromites. The presence of high and medium-chromium spinels in the interval of one sample indicates a deep origin of the melt. Chemical compositions of spinels from tuffites and highly diamondiferous kimberlites vary considerably, spinels from the Mir pipe are characterized by direct correlation between AhO3 and Cr2O3, for spinels from tuffites this trend is not observed; a significantly higher content of ТЮ2 is typical for the tuffite spinels that can be attributed to a particular source type. Melt inclusions in chrome spinels are studied by electron microprobe analysis and Raman spectroscopy. Olivine, pyroxene, phlogopite and nephe-line phases are identified in the melt inclusions.
Биллер, А. Я. Хромшпинелиды алмазоносных туффитов Булкурской антиклинали (северо-восток Сибирской платформы) / А. Я. Биллер, С. С. Угапьева, О. Б. Олейников // Наука и образование. — 2017. — N 4 (88), октябрь-декабрь. — С. 44-49.
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