MARBLE DIKES IN THE OLKHON COMPOSITE TERRANE (WEST BAIKAL AREA)
Linear or lens-like carbonate (marble) and carbonate-silicate bodies among gabbro and amphibolites within the Krestovsky subterrane of the Olkhon composite terrane (West Baikal Area) are identified as dikes. The dikes commonly dip almost vertically, range in thickness from 20 cm to a few meters, and...
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Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust
2022-12-01
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| Series: | Геодинамика и тектонофизика |
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| Online Access: | https://www.gt-crust.ru/jour/article/view/1578 |
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| author | E. V. Sklyarov A. V. Lavrenchuk A. M. Mazukabzov |
| author_facet | E. V. Sklyarov A. V. Lavrenchuk A. M. Mazukabzov |
| author_sort | E. V. Sklyarov |
| collection | DOAJ |
| description | Linear or lens-like carbonate (marble) and carbonate-silicate bodies among gabbro and amphibolites within the Krestovsky subterrane of the Olkhon composite terrane (West Baikal Area) are identified as dikes. The dikes commonly dip almost vertically, range in thickness from 20 cm to a few meters, and are up to 100 m long. The Olkhon marble dikes quite often coexist with dolerite dikes and/or granite veins and show signatures of emplacement synchronously with the igneous bodies. The marble dikes differ from mantle carbonatites in mineralogy and chemistry and thus may be derived from sedimentary carbonate rocks molten during collisional events.The origin of the Olkhon carbonate and carbonate-silicate dikes may be explained with two possible geodynamic scenarios. They may be derived either from Neoproterozoic carbonate sediments upon the Early Precambrian basement of a cratonic block which was involved in collisional events, or from abundant carbonate sedimentary material in an island-arc terrane. Large-scale melting of silicate and carbonate rocks was maintained by heat released from mantle mafic magma intruding into the lower crust. The batches of both crustal (carbonate and granitic) and mantle (mafic) melts intruded late during the collision in a strike-slip tectonic setting. |
| format | Article |
| id | doaj-art-759d9e93e195482e93276569d963d1cc |
| institution | Kabale University |
| issn | 2078-502X |
| language | English |
| publishDate | 2022-12-01 |
| publisher | Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust |
| record_format | Article |
| series | Геодинамика и тектонофизика |
| spelling | doaj-art-759d9e93e195482e93276569d963d1cc2025-08-20T03:59:45ZengRussian Academy of Sciences, Siberian Branch, Institute of the Earth's crustГеодинамика и тектонофизика2078-502X2022-12-0113510.5800/GT-2022-13-5-0667668MARBLE DIKES IN THE OLKHON COMPOSITE TERRANE (WEST BAIKAL AREA)E. V. Sklyarov0A. V. Lavrenchuk1A. M. Mazukabzov2Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of SciencesSobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of SciencesInstitute of the Earth’s Crust, Siberian Branch of the Russian Academy of SciencesLinear or lens-like carbonate (marble) and carbonate-silicate bodies among gabbro and amphibolites within the Krestovsky subterrane of the Olkhon composite terrane (West Baikal Area) are identified as dikes. The dikes commonly dip almost vertically, range in thickness from 20 cm to a few meters, and are up to 100 m long. The Olkhon marble dikes quite often coexist with dolerite dikes and/or granite veins and show signatures of emplacement synchronously with the igneous bodies. The marble dikes differ from mantle carbonatites in mineralogy and chemistry and thus may be derived from sedimentary carbonate rocks molten during collisional events.The origin of the Olkhon carbonate and carbonate-silicate dikes may be explained with two possible geodynamic scenarios. They may be derived either from Neoproterozoic carbonate sediments upon the Early Precambrian basement of a cratonic block which was involved in collisional events, or from abundant carbonate sedimentary material in an island-arc terrane. Large-scale melting of silicate and carbonate rocks was maintained by heat released from mantle mafic magma intruding into the lower crust. The batches of both crustal (carbonate and granitic) and mantle (mafic) melts intruded late during the collision in a strike-slip tectonic setting.https://www.gt-crust.ru/jour/article/view/1578marble dikeolkhon terranestrike-slip tectonicsmetamorphismdeformation |
| spellingShingle | E. V. Sklyarov A. V. Lavrenchuk A. M. Mazukabzov MARBLE DIKES IN THE OLKHON COMPOSITE TERRANE (WEST BAIKAL AREA) Геодинамика и тектонофизика marble dike olkhon terrane strike-slip tectonics metamorphism deformation |
| title | MARBLE DIKES IN THE OLKHON COMPOSITE TERRANE (WEST BAIKAL AREA) |
| title_full | MARBLE DIKES IN THE OLKHON COMPOSITE TERRANE (WEST BAIKAL AREA) |
| title_fullStr | MARBLE DIKES IN THE OLKHON COMPOSITE TERRANE (WEST BAIKAL AREA) |
| title_full_unstemmed | MARBLE DIKES IN THE OLKHON COMPOSITE TERRANE (WEST BAIKAL AREA) |
| title_short | MARBLE DIKES IN THE OLKHON COMPOSITE TERRANE (WEST BAIKAL AREA) |
| title_sort | marble dikes in the olkhon composite terrane west baikal area |
| topic | marble dike olkhon terrane strike-slip tectonics metamorphism deformation |
| url | https://www.gt-crust.ru/jour/article/view/1578 |
| work_keys_str_mv | AT evsklyarov marbledikesintheolkhoncompositeterranewestbaikalarea AT avlavrenchuk marbledikesintheolkhoncompositeterranewestbaikalarea AT ammazukabzov marbledikesintheolkhoncompositeterranewestbaikalarea |