Polyphase Inclusions in Chromium Spinels from Upper Triassic Gravelites from the Northeastern Part of the Siberian Platform
- Авторы: Nikolenko E.1, Logvinova A.1,2, Izokh A.1,2, Afanasiev V.1, Oleynikov O.3, Biller A.3
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Учреждения:
- Sobolev Institute of Geology and Mineralogy, Siberian Branch
- Novosibirsk State University
- Institute of Diamond and Precious Metal Geology
- Выпуск: Том 480, № 1 (2018)
- Страницы: 656-660
- Раздел: Geochemistry
- URL: https://journals.rcsi.science/1028-334X/article/view/193188
- DOI: https://doi.org/10.1134/S1028334X18050264
- ID: 193188
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Аннотация
A comparative study of the chemical compositions of chromium spinel and polyphase inclusions has been carried out. Chromium spinels were separated from the concentrate of the Carnian Stage (T3) rock sample collected at the northeastern fringe of the Siberian platform. The chromium spinels show a wide variety of compositions, most of which are of the “Kurung” type, which is considered to be a deceptive indicator of a kimberlite. They contain inclusions in the size range of 10–100 μm and contain several mineral phases. The most frequent inclusions are olivine and clinopyroxene; additional phases are nepheline, K–Fsp, Ti–Mg–Ca–amphibole, Ti–biotite (phlogopite), apatite and perovskite. Ilmenite and iron sulfides are less common. The data obtained on the composition of these inclusions indicate differences in the conditions of their formation and possibly different types of parental sources. A possible type of provenance source could be potassium alkali basites.
Об авторах
E. Nikolenko
Sobolev Institute of Geology and Mineralogy, Siberian Branch
Автор, ответственный за переписку.
Email: nevgeny@gmail.com
Россия, Novosibirsk, 630090
A. Logvinova
Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University
Email: nevgeny@gmail.com
Россия, Novosibirsk, 630090; Novosibirsk, 630090
A. Izokh
Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University
Email: nevgeny@gmail.com
Россия, Novosibirsk, 630090; Novosibirsk, 630090
V. Afanasiev
Sobolev Institute of Geology and Mineralogy, Siberian Branch
Email: nevgeny@gmail.com
Россия, Novosibirsk, 630090
O. Oleynikov
Institute of Diamond and Precious Metal Geology
Email: nevgeny@gmail.com
Россия, Yakutsk, 677891
A. Biller
Institute of Diamond and Precious Metal Geology
Email: nevgeny@gmail.com
Россия, Yakutsk, 677891