Olivine-chrome-spinel equilibrium in chromitites and ultramafites of Rai-Iz massif, Polar Urals
Olivine and chrome-spinel compositions from chromitites and ore-bearing metamorphosed ultramafic rocks of Rai-Iz massif were compared. It was established that olivine and spinel ferruginosity are directly proportional and increase monotonically from chromitites to ultramafic rocks that indicates the...
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| Format: | Article |
| Language: | English |
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A.N. Zavaritsky Institute of Geology and Geochemistry
2016-04-01
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| Series: | Литосфера |
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| Online Access: | https://www.lithosphere.ru/jour/article/view/19 |
| _version_ | 1818256718237270016 |
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| author | P. B. Shirjaev N. V. Vakhrusheva |
| author_facet | P. B. Shirjaev N. V. Vakhrusheva |
| author_sort | P. B. Shirjaev |
| collection | DOAJ |
| description | Olivine and chrome-spinel compositions from chromitites and ore-bearing metamorphosed ultramafic rocks of Rai-Iz massif were compared. It was established that olivine and spinel ferruginosity are directly proportional and increase monotonically from chromitites to ultramafic rocks that indicates the existence of equilibrium in the ore-rock system. The compositions of accessory spinel are in agreement with compositions of ferrichromite and chromemagnetite, which are highly oxidized spinel group minerals, typical for metamorphic ultramafic rocks. The obtained results suggests that chromitites and metamorphosed ultramafic rocks are products of a single process which is metamorphic differentiation of ultramafic rocks. |
| first_indexed | 2024-12-12T17:32:12Z |
| format | Article |
| id | doaj.art-f45a9db879c84009b2d28fd1f956aaff |
| institution | Directory Open Access Journal |
| issn | 1681-9004 2500-302X |
| language | English |
| last_indexed | 2024-12-12T17:32:12Z |
| publishDate | 2016-04-01 |
| publisher | A.N. Zavaritsky Institute of Geology and Geochemistry |
| record_format | Article |
| series | Литосфера |
| spelling | doaj.art-f45a9db879c84009b2d28fd1f956aaff2022-12-22T00:17:20ZengA.N. Zavaritsky Institute of Geology and GeochemistryЛитосфера1681-90042500-302X2016-04-010210711019Olivine-chrome-spinel equilibrium in chromitites and ultramafites of Rai-Iz massif, Polar UralsP. B. Shirjaev0N. V. Vakhrusheva1Institute of Geology and Geochemitry Urals Branch of RASInstitute of Geology and Geochemitry Urals Branch of RASOlivine and chrome-spinel compositions from chromitites and ore-bearing metamorphosed ultramafic rocks of Rai-Iz massif were compared. It was established that olivine and spinel ferruginosity are directly proportional and increase monotonically from chromitites to ultramafic rocks that indicates the existence of equilibrium in the ore-rock system. The compositions of accessory spinel are in agreement with compositions of ferrichromite and chromemagnetite, which are highly oxidized spinel group minerals, typical for metamorphic ultramafic rocks. The obtained results suggests that chromitites and metamorphosed ultramafic rocks are products of a single process which is metamorphic differentiation of ultramafic rocks.https://www.lithosphere.ru/jour/article/view/19хромититыоливин-шпинелевое равновесиеметаморфизмрудообразованиемассив рай-изchromititesolivine-spinel equilibriummetamorphismore genesisrai-iz massif |
| spellingShingle | P. B. Shirjaev N. V. Vakhrusheva Olivine-chrome-spinel equilibrium in chromitites and ultramafites of Rai-Iz massif, Polar Urals Литосфера хромититы оливин-шпинелевое равновесие метаморфизм рудообразование массив рай-из chromitites olivine-spinel equilibrium metamorphism ore genesis rai-iz massif |
| title | Olivine-chrome-spinel equilibrium in chromitites and ultramafites of Rai-Iz massif, Polar Urals |
| title_full | Olivine-chrome-spinel equilibrium in chromitites and ultramafites of Rai-Iz massif, Polar Urals |
| title_fullStr | Olivine-chrome-spinel equilibrium in chromitites and ultramafites of Rai-Iz massif, Polar Urals |
| title_full_unstemmed | Olivine-chrome-spinel equilibrium in chromitites and ultramafites of Rai-Iz massif, Polar Urals |
| title_short | Olivine-chrome-spinel equilibrium in chromitites and ultramafites of Rai-Iz massif, Polar Urals |
| title_sort | olivine chrome spinel equilibrium in chromitites and ultramafites of rai iz massif polar urals |
| topic | хромититы оливин-шпинелевое равновесие метаморфизм рудообразование массив рай-из chromitites olivine-spinel equilibrium metamorphism ore genesis rai-iz massif |
| url | https://www.lithosphere.ru/jour/article/view/19 |
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