Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India
The main mass of the Sevathur carbonatite complex (Tamil Nadu, India) consists of dolomite carbonatite with a small number of ankerite carbonatite dikes. Calcite carbonatite occurs in a very minor amount as thin veins within the dolomite carbonatite. The age (<sup>207</sup>Pb/<sup>...
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MDPI AG
2021-03-01
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| author | Maria Rampilova Anna Doroshkevich Shrinivas Viladkar Elizaveta Zubakova |
| author_facet | Maria Rampilova Anna Doroshkevich Shrinivas Viladkar Elizaveta Zubakova |
| author_sort | Maria Rampilova |
| collection | DOAJ |
| description | The main mass of the Sevathur carbonatite complex (Tamil Nadu, India) consists of dolomite carbonatite with a small number of ankerite carbonatite dikes. Calcite carbonatite occurs in a very minor amount as thin veins within the dolomite carbonatite. The age (<sup>207</sup>Pb/<sup>204</sup>Pb) of the Sevathur carbonatites is 801 ± 11 Ma, they are emplaced within the Precambrian granulite terrains along NE–SW trending fault systems. Minor minerals in dolomite carbonatite are fluorapatite, phlogopite (with a kinoshitalite component), amphibole and magnetite. Pyrochlore (rich in UO<sub>2</sub>), monazite-Ce, and barite are accessory minerals. Dolomite carbonatite at the Sevathur complex contains norsethite, calcioburbankite, and benstonite as inclusions in primary calcite and are interpreted as primary minerals. They are indicative of Na, Sr, Mg, Ba, and LREE enrichment in their parental carbonatitic magma. Norsethite, calcioburbankite, and benstonite have not been previously known at Sevathur. The hydrothermal processes at the Sevathur carbonatites lead to alteration of pyrochlore into hydropyrochlore, and Ba-enrichment. Also, it leads to formation of monazite-(Ce) and barite-II. |
| first_indexed | 2024-03-10T12:48:09Z |
| format | Article |
| id | doaj.art-2bfae69299e649b290846dd979e9f79f |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T12:48:09Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
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| series | Minerals |
| spelling | doaj.art-2bfae69299e649b290846dd979e9f79f2023-11-21T13:19:03ZengMDPI AGMinerals2075-163X2021-03-0111435510.3390/min11040355Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, IndiaMaria Rampilova0Anna Doroshkevich1Shrinivas Viladkar2Elizaveta Zubakova3Geological Institute, Siberian Branch of the Russian Academy of Sciences, Sakhyanova Street 6a, 670047 Ulan-Ude, RussiaGeological Institute, Siberian Branch of the Russian Academy of Sciences, Sakhyanova Street 6a, 670047 Ulan-Ude, RussiaIndian Institute of Science Education and Research, Bhopal 462066, IndiaSobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Akademika Koptyuga Avenue 3, 630090 Novosibirsk, RussiaThe main mass of the Sevathur carbonatite complex (Tamil Nadu, India) consists of dolomite carbonatite with a small number of ankerite carbonatite dikes. Calcite carbonatite occurs in a very minor amount as thin veins within the dolomite carbonatite. The age (<sup>207</sup>Pb/<sup>204</sup>Pb) of the Sevathur carbonatites is 801 ± 11 Ma, they are emplaced within the Precambrian granulite terrains along NE–SW trending fault systems. Minor minerals in dolomite carbonatite are fluorapatite, phlogopite (with a kinoshitalite component), amphibole and magnetite. Pyrochlore (rich in UO<sub>2</sub>), monazite-Ce, and barite are accessory minerals. Dolomite carbonatite at the Sevathur complex contains norsethite, calcioburbankite, and benstonite as inclusions in primary calcite and are interpreted as primary minerals. They are indicative of Na, Sr, Mg, Ba, and LREE enrichment in their parental carbonatitic magma. Norsethite, calcioburbankite, and benstonite have not been previously known at Sevathur. The hydrothermal processes at the Sevathur carbonatites lead to alteration of pyrochlore into hydropyrochlore, and Ba-enrichment. Also, it leads to formation of monazite-(Ce) and barite-II.https://www.mdpi.com/2075-163X/11/4/355dolomite carbonatitespyrochlorenorsethitebenstonitecalcioburbankiteSevathur |
| spellingShingle | Maria Rampilova Anna Doroshkevich Shrinivas Viladkar Elizaveta Zubakova Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India Minerals dolomite carbonatites pyrochlore norsethite benstonite calcioburbankite Sevathur |
| title | Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India |
| title_full | Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India |
| title_fullStr | Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India |
| title_full_unstemmed | Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India |
| title_short | Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India |
| title_sort | mineralogy of dolomite carbonatites of sevathur complex tamil nadu india |
| topic | dolomite carbonatites pyrochlore norsethite benstonite calcioburbankite Sevathur |
| url | https://www.mdpi.com/2075-163X/11/4/355 |
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