Magnetite in Sokli carbonatite massif and in Tulppio olivinite
Occurrence, ilmenite exsolutions and composition of magnetite in the carbonatite massif of Sokli and in the olivinite of Tulppio have been studied. In the carbonatite massif, magnetite of magmatic carbonatites is hypidio-idiomorphic, contains only very fine-grained ilmenite exsolutions (ulvöspinel),...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Geological Society of Finland
1981-12-01
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| Series: | Bulletin of the Geological Society of Finland |
| Online Access: | http://www.geologinenseura.fi/bulletin/Volume53/sgs_bt_053_2_pages_083_090.pdf |
| _version_ | 1811260401040490496 |
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| author | K. Heinänen H. Vartiainen |
| author_facet | K. Heinänen H. Vartiainen |
| author_sort | K. Heinänen |
| collection | DOAJ |
| description | Occurrence, ilmenite exsolutions and composition of magnetite in the carbonatite massif of Sokli and in the olivinite of Tulppio have been studied. In the carbonatite massif, magnetite of magmatic carbonatites is hypidio-idiomorphic, contains only very fine-grained ilmenite exsolutions (ulvöspinel), and the minor components TiO2, MgO, MnO and AI2O3 of magnetite show a decreasing tendency in the successive I -> II -> IV magmatic stages. Magnetite of metacarbonatite is xenomorphic, containing a great number of ilmenite exsolutions indicating a complicated thermal history of these rocks. The magnetite of the magmatic carbonatites has lower TiO2 and higher MnO, AI2O3, MgO and ZnO contents than that of the metacarbonatites, on the average. Magnetite of the Tulppio olivinite is fine-grained, and the minor element contents, excepting Cr and Si, are lower than those in the carbonatite massif. |
| first_indexed | 2024-04-12T18:46:49Z |
| format | Article |
| id | doaj.art-fe4fa462cfa44d1a8aece81e5fde28aa |
| institution | Directory Open Access Journal |
| issn | 0367-5211 1799-4632 |
| language | English |
| last_indexed | 2024-04-12T18:46:49Z |
| publishDate | 1981-12-01 |
| publisher | Geological Society of Finland |
| record_format | Article |
| series | Bulletin of the Geological Society of Finland |
| spelling | doaj.art-fe4fa462cfa44d1a8aece81e5fde28aa2022-12-22T03:20:35ZengGeological Society of FinlandBulletin of the Geological Society of Finland0367-52111799-46321981-12-01532839010.17741/bgsf/53.2.002Magnetite in Sokli carbonatite massif and in Tulppio oliviniteK. HeinänenH. VartiainenOccurrence, ilmenite exsolutions and composition of magnetite in the carbonatite massif of Sokli and in the olivinite of Tulppio have been studied. In the carbonatite massif, magnetite of magmatic carbonatites is hypidio-idiomorphic, contains only very fine-grained ilmenite exsolutions (ulvöspinel), and the minor components TiO2, MgO, MnO and AI2O3 of magnetite show a decreasing tendency in the successive I -> II -> IV magmatic stages. Magnetite of metacarbonatite is xenomorphic, containing a great number of ilmenite exsolutions indicating a complicated thermal history of these rocks. The magnetite of the magmatic carbonatites has lower TiO2 and higher MnO, AI2O3, MgO and ZnO contents than that of the metacarbonatites, on the average. Magnetite of the Tulppio olivinite is fine-grained, and the minor element contents, excepting Cr and Si, are lower than those in the carbonatite massif.http://www.geologinenseura.fi/bulletin/Volume53/sgs_bt_053_2_pages_083_090.pdf |
| spellingShingle | K. Heinänen H. Vartiainen Magnetite in Sokli carbonatite massif and in Tulppio olivinite Bulletin of the Geological Society of Finland |
| title | Magnetite in Sokli carbonatite massif and in Tulppio olivinite |
| title_full | Magnetite in Sokli carbonatite massif and in Tulppio olivinite |
| title_fullStr | Magnetite in Sokli carbonatite massif and in Tulppio olivinite |
| title_full_unstemmed | Magnetite in Sokli carbonatite massif and in Tulppio olivinite |
| title_short | Magnetite in Sokli carbonatite massif and in Tulppio olivinite |
| title_sort | magnetite in sokli carbonatite massif and in tulppio olivinite |
| url | http://www.geologinenseura.fi/bulletin/Volume53/sgs_bt_053_2_pages_083_090.pdf |
| work_keys_str_mv | AT kheinanen magnetiteinsoklicarbonatitemassifandintulppioolivinite AT hvartiainen magnetiteinsoklicarbonatitemassifandintulppioolivinite |