دورية أكاديمية
Zr-Th-U MINERALS IN HIGH-MG DIORITE OF THE CHELYABINSK MASSIF (SOUTH URALS) – EVIDENCE FOR CRUST–MANTLE INTERACTION
| العنوان: | Zr-Th-U MINERALS IN HIGH-MG DIORITE OF THE CHELYABINSK MASSIF (SOUTH URALS) – EVIDENCE FOR CRUST–MANTLE INTERACTION |
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| المؤلفون: | T. A. Osipova, G. A. Kallistov, D. A. Zamyatin, V. A. Bulatov |
| المصدر: | Геодинамика и тектонофизика, Vol 12, Iss 2, Pp 350-364 (2021) |
| بيانات النشر: | Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Science |
| مصطلحات موضوعية: | high-mg diorite, baddeleyite, uranotorianite, zircon, petrogenesis, crust–mantle interaction, south urals, cathodoluminescence, electron probe microanalysis, Science |
| الوصف: | Zr-Th-U minerals, namely baddeleyite, zircon and U-Th-oxide, were found in high-Mg diorite from the Late Devonian – Early Carboniferous synplutonic dyke in granodiorites of the Chelyabinsk massif, South Urals. Micron-sized minerals were investigated by electron microscopy and cathodoluminescence spectroscopy. Their chemical compositions were determined by electron probe microanalysis that was optimized to ensure more precise measurements of the composition of minerals. Baddeleyite grains are found as inclusions in amphibole crystals and reside in intergranular areas. The former retain their composition and show no traces of corrosion or substitution. In the intergranular areas, baddeleyite grains were replaced by polycrystalline zircon due to the reaction with an acid melt, and the U-Th-oxide precipitated inside baddeleyite simultaneously, which suggests the restite origin of baddeleyite. The main features of the baddeleyite composition are extremely high concentrations of ThO2 and UO2 (to 0.03 wt. % and 1.0 wt. %, respectively), which may be due to the metasomatic interaction between the mantle peridotite and the crustal or carbonatite fluid or melt. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English Russian |
| تدمد: | 2078-502X |
| Relation: | https://www.gt-crust.ru/jour/article/view/1215; https://doaj.org/toc/2078-502X |
| DOI: | 10.5800/GT-2021-12-2-0528 |
| URL الوصول: | https://doaj.org/article/4aad854693bf4ed69704c5b3fc246e27 |
| رقم الأكسشن: | edsdoj.4aad854693bf4ed69704c5b3fc246e27 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 2078502X |
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| DOI: | 10.5800/GT-2021-12-2-0528 |