MAGMATIC SOURCES OF THE EVOLVING CONTINENTAL TECTONOSPHERE IN INDIA: GENERATION OF ALKALINE IGNEOUS COMPLEXES WITH CARBONATITES IN THE SAMALPATTI (SOUTHERN INDIA) AND AMBA DONGAR (WESTERN INDIA) MASSIFS
Neoproterozoic Samalpatti and Cretaceous-Paleogene Amba Dongar massifs are considered to evaluate the change of sources of carbonatite magmatism in evolving tectonosphere of India. The inherited character of Ba and Sr distribution components is traced in heterogeneous carbonatites of India, whereas...
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Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust
2024-10-01
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| Series: | Геодинамика и тектонофизика |
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| Online Access: | https://www.gt-crust.ru/jour/article/view/1919 |
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| author | S. V. Rasskazov T. A. Yasnygina K. R. Hari I. S. Chuvashova E. V. Saranina |
| author_facet | S. V. Rasskazov T. A. Yasnygina K. R. Hari I. S. Chuvashova E. V. Saranina |
| author_sort | S. V. Rasskazov |
| collection | DOAJ |
| description | Neoproterozoic Samalpatti and Cretaceous-Paleogene Amba Dongar massifs are considered to evaluate the change of sources of carbonatite magmatism in evolving tectonosphere of India. The inherited character of Ba and Sr distribution components is traced in heterogeneous carbonatites of India, whereas the independent trends in Ba and Sr enrichment are traced in carbonatites of North Asia. It is inferred that in the process of activity in the tectonosphere of the Indian subcontinent ~800 Ma ago, carbonatite melts were generated in the mantle whose photolith has an age of 4.26 Ga. This protomantle reservoir was remarkably different from the primordial mantle reservoir in the solidified magma ocean in terms of low initial μ and high initial Nd isotope ratio. After the Indian subcontinent had separated from Gondwana 130–100 Ma ago and began to join Asia ~66 Ma ago, ELMU source was activiated in the tectonosphere. The Amba Dongar carbonatites might have been derived from the 4.40 Ga mantle protoliths. Silicate melts of the Deccan LIP were simultaneously generated from the protoliths with Pb-Pb age of ~2 Ga. |
| format | Article |
| id | doaj-art-32bfcd7ea96e422785f52c6924e4ff56 |
| institution | DOAJ |
| issn | 2078-502X |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust |
| record_format | Article |
| series | Геодинамика и тектонофизика |
| spelling | doaj-art-32bfcd7ea96e422785f52c6924e4ff562025-08-20T03:02:41ZengRussian Academy of Sciences, Siberian Branch, Institute of the Earth's crustГеодинамика и тектонофизика2078-502X2024-10-0115510.5800/GT-2024-15-5-0783784MAGMATIC SOURCES OF THE EVOLVING CONTINENTAL TECTONOSPHERE IN INDIA: GENERATION OF ALKALINE IGNEOUS COMPLEXES WITH CARBONATITES IN THE SAMALPATTI (SOUTHERN INDIA) AND AMBA DONGAR (WESTERN INDIA) MASSIFSS. V. Rasskazov0T. A. Yasnygina1K. R. Hari2I. S. Chuvashova3E. V. Saranina4Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences ; Irkutsk State UniversityInstitute of the Earth’s Crust, Siberian Branch of the Russian Academy of SciencesPt. Ravishankar Shukla UniversityInstitute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences ; Irkutsk State UniversityInstitute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences ; Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of SciencesNeoproterozoic Samalpatti and Cretaceous-Paleogene Amba Dongar massifs are considered to evaluate the change of sources of carbonatite magmatism in evolving tectonosphere of India. The inherited character of Ba and Sr distribution components is traced in heterogeneous carbonatites of India, whereas the independent trends in Ba and Sr enrichment are traced in carbonatites of North Asia. It is inferred that in the process of activity in the tectonosphere of the Indian subcontinent ~800 Ma ago, carbonatite melts were generated in the mantle whose photolith has an age of 4.26 Ga. This protomantle reservoir was remarkably different from the primordial mantle reservoir in the solidified magma ocean in terms of low initial μ and high initial Nd isotope ratio. After the Indian subcontinent had separated from Gondwana 130–100 Ma ago and began to join Asia ~66 Ma ago, ELMU source was activiated in the tectonosphere. The Amba Dongar carbonatites might have been derived from the 4.40 Ga mantle protoliths. Silicate melts of the Deccan LIP were simultaneously generated from the protoliths with Pb-Pb age of ~2 Ga.https://www.gt-crust.ru/jour/article/view/1919carbonatitesnepheline syenitesneoproterozoiccretaceouspaleogenebasrtrace elements207pb/204pb143nd/144nd87sr/86sr |
| spellingShingle | S. V. Rasskazov T. A. Yasnygina K. R. Hari I. S. Chuvashova E. V. Saranina MAGMATIC SOURCES OF THE EVOLVING CONTINENTAL TECTONOSPHERE IN INDIA: GENERATION OF ALKALINE IGNEOUS COMPLEXES WITH CARBONATITES IN THE SAMALPATTI (SOUTHERN INDIA) AND AMBA DONGAR (WESTERN INDIA) MASSIFS Геодинамика и тектонофизика carbonatites nepheline syenites neoproterozoic cretaceous paleogene ba sr trace elements 207pb/204pb 143nd/144nd 87sr/86sr |
| title | MAGMATIC SOURCES OF THE EVOLVING CONTINENTAL TECTONOSPHERE IN INDIA: GENERATION OF ALKALINE IGNEOUS COMPLEXES WITH CARBONATITES IN THE SAMALPATTI (SOUTHERN INDIA) AND AMBA DONGAR (WESTERN INDIA) MASSIFS |
| title_full | MAGMATIC SOURCES OF THE EVOLVING CONTINENTAL TECTONOSPHERE IN INDIA: GENERATION OF ALKALINE IGNEOUS COMPLEXES WITH CARBONATITES IN THE SAMALPATTI (SOUTHERN INDIA) AND AMBA DONGAR (WESTERN INDIA) MASSIFS |
| title_fullStr | MAGMATIC SOURCES OF THE EVOLVING CONTINENTAL TECTONOSPHERE IN INDIA: GENERATION OF ALKALINE IGNEOUS COMPLEXES WITH CARBONATITES IN THE SAMALPATTI (SOUTHERN INDIA) AND AMBA DONGAR (WESTERN INDIA) MASSIFS |
| title_full_unstemmed | MAGMATIC SOURCES OF THE EVOLVING CONTINENTAL TECTONOSPHERE IN INDIA: GENERATION OF ALKALINE IGNEOUS COMPLEXES WITH CARBONATITES IN THE SAMALPATTI (SOUTHERN INDIA) AND AMBA DONGAR (WESTERN INDIA) MASSIFS |
| title_short | MAGMATIC SOURCES OF THE EVOLVING CONTINENTAL TECTONOSPHERE IN INDIA: GENERATION OF ALKALINE IGNEOUS COMPLEXES WITH CARBONATITES IN THE SAMALPATTI (SOUTHERN INDIA) AND AMBA DONGAR (WESTERN INDIA) MASSIFS |
| title_sort | magmatic sources of the evolving continental tectonosphere in india generation of alkaline igneous complexes with carbonatites in the samalpatti southern india and amba dongar western india massifs |
| topic | carbonatites nepheline syenites neoproterozoic cretaceous paleogene ba sr trace elements 207pb/204pb 143nd/144nd 87sr/86sr |
| url | https://www.gt-crust.ru/jour/article/view/1919 |
| work_keys_str_mv | AT svrasskazov magmaticsourcesoftheevolvingcontinentaltectonosphereinindiagenerationofalkalineigneouscomplexeswithcarbonatitesinthesamalpattisouthernindiaandambadongarwesternindiamassifs AT tayasnygina magmaticsourcesoftheevolvingcontinentaltectonosphereinindiagenerationofalkalineigneouscomplexeswithcarbonatitesinthesamalpattisouthernindiaandambadongarwesternindiamassifs AT krhari magmaticsourcesoftheevolvingcontinentaltectonosphereinindiagenerationofalkalineigneouscomplexeswithcarbonatitesinthesamalpattisouthernindiaandambadongarwesternindiamassifs AT ischuvashova magmaticsourcesoftheevolvingcontinentaltectonosphereinindiagenerationofalkalineigneouscomplexeswithcarbonatitesinthesamalpattisouthernindiaandambadongarwesternindiamassifs AT evsaranina magmaticsourcesoftheevolvingcontinentaltectonosphereinindiagenerationofalkalineigneouscomplexeswithcarbonatitesinthesamalpattisouthernindiaandambadongarwesternindiamassifs |