|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Iron-bearing to Iron-rich tourmalines from granitic pegmatites of the Murzinka pluton, Central Urals, Russiaстатья
- Авторы: Gvozdenko Tatiana A., Baksheev Ivan A., Khanin Dmitry A., Voronin Mikhail V., Chervyakovskaya Maria V., Smolensky Vadim V.
- Журнал: Mineralogical Magazine
- Том: 86
- Номер: 6
- Год издания: 2022
- Издательство: Mineralogical Society
- Местоположение издательства: United Kingdom
- Первая страница: 948
- Последняя страница: 965
- DOI: 10.1180/mgm.2022.104
- Аннотация: Black tourmalines from seven granitic pegmatites (Golodnaya, Kazennitsa, Mokrusha, Kopi Mora, Zheltyye Yamy, Buzheninov Bor andMinisterskaya) related to the Murzinka pluton, Central Urals, Russia have been investigated using electron microprobe analysis, LA-ICPMS,Raman and Mössbauer spectroscopy. Pegmatites are hosted by serpentinites and gneisses and are classified as schorl, oxy-schorl,fluor-schorl, dravite, oxy-dravite, foitite, oxy-foitite and darrellhenryite. The possible compositional evolution of tourmalines fromthe Ural pegmatites is as follows: Mg-rich dravite through to Fe-rich schorl, foitite and oxy-foitite to Fe- and Mn-rich darrellhenryite.The major substitutions in the tourmalines are: (1) Fe2+ ↔ Mg; (2) Al + WO2– ↔ Fe2+ + WOH–; (3) X-site vacancy + Al ↔ Na + Fe2+; (4) Al+ WO2– ↔ Mg + WOH–; (5) X-site vacancy + Al ↔ Na +Mg; and (6) Fe ↔ Mn. Statical processing of the trace- and major-element compositiondistinguished three tourmaline groups: (1) trace Co, Ni, Pb, and major Ca and Mg; (2) uni-, di- and trivalent traces (Li, Zn, Ga) anddi- and trivalent majors (Al, Mn); (3) U, Th, Hf, Ta, Nb, Y, In, and Sn which correspond to tri-, tetra-, and pentavalent high-field-strengthelements. Mössbauer data shows the Fe3+/Fe2+ ratios in tourmalines from pegmatites hosted by gneisses (0.05–0.18) and serpentinites (0.28–0.65), indicates different oxidising environments. Raman data are consistent with the composition of the tourmalines.
- Добавил в систему: Бакшеев Иван Андреевич