Metasomatites of medium and mafic composition from Nyaschevo massif (Ilmeny Mauntains, South Urals)
The results of the study of mediosiliceous and mafic metasomatites located in ultramafic and mafic rocks Nyaschevo massif presents in the paper. The texthural and structural features of these rocks allow to attribute them to tectonites - protomylonites and mylonites. Mineralogical and geochemical char...
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| Format: | Article |
| Language: | English |
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A.N. Zavaritsky Institute of Geology and Geochemistry
2015-12-01
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| Series: | Литосфера |
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| Online Access: | https://www.lithosphere.ru/jour/article/view/159 |
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| author | E. V. Medvedeva A. B. Nemov V. A. Kotlyarov |
| author_facet | E. V. Medvedeva A. B. Nemov V. A. Kotlyarov |
| author_sort | E. V. Medvedeva |
| collection | DOAJ |
| description | The results of the study of mediosiliceous and mafic metasomatites located in ultramafic and mafic rocks Nyaschevo massif presents in the paper. The texthural and structural features of these rocks allow to attribute them to tectonites - protomylonites and mylonites. Mineralogical and geochemical characteristics of the rocks indicate to polycyclic process of metamorphism accompanied by metasomatic transformation. The metasomatites of medium composition have been characterized the primary of magmatic origins followed by metamorphic and regional deformation processes associated with metasomatic transformation (gedrite, cummingtonite ( T = 800-700°С, P = 2-5 kbar)).The metasomatites of mafic composition are the result of mylonitization and metasomatism under the influence of fluid induced the mobility of elements, such as Al, Ti, К, Ba and LREE. The input Mg from host serpentinites on the final stages of conversion is clear recorded in the forming of gedrite and height-magnesium enstatite. The metasomatites of mafic composition is showed the petrogeochemical connection with the rocks of syenite-carbonatite association. |
| first_indexed | 2024-12-13T05:23:10Z |
| format | Article |
| id | doaj.art-68dcaf4b31504bd3b8a6cd31365dd40a |
| institution | Directory Open Access Journal |
| issn | 1681-9004 2500-302X |
| language | English |
| last_indexed | 2024-12-13T05:23:10Z |
| publishDate | 2015-12-01 |
| publisher | A.N. Zavaritsky Institute of Geology and Geochemistry |
| record_format | Article |
| series | Литосфера |
| spelling | doaj.art-68dcaf4b31504bd3b8a6cd31365dd40a2022-12-21T23:58:16ZengA.N. Zavaritsky Institute of Geology and GeochemistryЛитосфера1681-90042500-302X2015-12-01065368159Metasomatites of medium and mafic composition from Nyaschevo massif (Ilmeny Mauntains, South Urals)E. V. Medvedeva0A. B. Nemov1V. A. Kotlyarov2Ilmeny StateReserveIlmeny StateReserveIstutut of Mineralogy, Urals Branch of RASThe results of the study of mediosiliceous and mafic metasomatites located in ultramafic and mafic rocks Nyaschevo massif presents in the paper. The texthural and structural features of these rocks allow to attribute them to tectonites - protomylonites and mylonites. Mineralogical and geochemical characteristics of the rocks indicate to polycyclic process of metamorphism accompanied by metasomatic transformation. The metasomatites of medium composition have been characterized the primary of magmatic origins followed by metamorphic and regional deformation processes associated with metasomatic transformation (gedrite, cummingtonite ( T = 800-700°С, P = 2-5 kbar)).The metasomatites of mafic composition are the result of mylonitization and metasomatism under the influence of fluid induced the mobility of elements, such as Al, Ti, К, Ba and LREE. The input Mg from host serpentinites on the final stages of conversion is clear recorded in the forming of gedrite and height-magnesium enstatite. The metasomatites of mafic composition is showed the petrogeochemical connection with the rocks of syenite-carbonatite association.https://www.lithosphere.ru/jour/article/view/159мафит-ультрамафитовая ассоциациямилонитыметаморфизмметасоматозалюмоэнстатитжедриткуммингтонитmafic-ultramafic associationmylonitesmetamorphismmetasomatismalumoenstatitgedritecummingtonite |
| spellingShingle | E. V. Medvedeva A. B. Nemov V. A. Kotlyarov Metasomatites of medium and mafic composition from Nyaschevo massif (Ilmeny Mauntains, South Urals) Литосфера мафит-ультрамафитовая ассоциация милониты метаморфизм метасоматоз алюмоэнстатит жедрит куммингтонит mafic-ultramafic association mylonites metamorphism metasomatism alumoenstatit gedrite cummingtonite |
| title | Metasomatites of medium and mafic composition from Nyaschevo massif (Ilmeny Mauntains, South Urals) |
| title_full | Metasomatites of medium and mafic composition from Nyaschevo massif (Ilmeny Mauntains, South Urals) |
| title_fullStr | Metasomatites of medium and mafic composition from Nyaschevo massif (Ilmeny Mauntains, South Urals) |
| title_full_unstemmed | Metasomatites of medium and mafic composition from Nyaschevo massif (Ilmeny Mauntains, South Urals) |
| title_short | Metasomatites of medium and mafic composition from Nyaschevo massif (Ilmeny Mauntains, South Urals) |
| title_sort | metasomatites of medium and mafic composition from nyaschevo massif ilmeny mauntains south urals |
| topic | мафит-ультрамафитовая ассоциация милониты метаморфизм метасоматоз алюмоэнстатит жедрит куммингтонит mafic-ultramafic association mylonites metamorphism metasomatism alumoenstatit gedrite cummingtonite |
| url | https://www.lithosphere.ru/jour/article/view/159 |
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