Age and geochemical evolution of granite magmatism in Olkhon region from Caledonian syncollisional ore-free granite to the rare metal granite and pegmatite of Middle Paleozoic intraplate setting
The detailed description of two granite complexes in the Olkhon subterrane is given. The Early Paleozoic Sharanur complex was formed by granitization of gneisses of the Olkhon series. It includes migmatites, granite-gneisses, granites and pegmatites of normal alkalinity; they belong to the type of s...
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KeAi Communications Co., Ltd.
2024-01-01
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| author | Viktor Antipin Valentina Makrygina Larisa Kushch Nataliya Sheptyakova |
| author_facet | Viktor Antipin Valentina Makrygina Larisa Kushch Nataliya Sheptyakova |
| author_sort | Viktor Antipin |
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| description | The detailed description of two granite complexes in the Olkhon subterrane is given. The Early Paleozoic Sharanur complex was formed by granitization of gneisses of the Olkhon series. It includes migmatites, granite-gneisses, granites and pegmatites of normal alkalinity; they belong to the type of syncollisional granites. The Middle Paleozoic Aya granite complex includes mother Aya massif of amazonite-bearing granites and several types of rare-metal pegmatites. They have elevated alkalinity, low of Ba, Sr, and high LILE and HFSE elements contents. The Aya pegmatites lie in northwest cracks of stretching and associated with the rise of the territory under the influence of the North Asian plume. These cracks and pegmatites mark the beginning of a new intraplate geodynamic setting. Two geochemical types are distinguished among the pegmatites of this complex. These are amazonite pegmatites of Li-F type with Ta mineralization and complex type pegmatite with Be-Rb-Nb-Ta and Li-F mineralization (the Ilixin vein). The Tashkiney pegmatite vein is similar to Ilixin, but lies in the gneisses of the Olkhon series. It shows high concentrations of Be, Nb, Ta, as well as W, Sn, but lacks Li and F, due to a greater depth and higher temperature of the melt crystallization of this pegmatite.©2024 China Geology Editorial Office. |
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| institution | Kabale University |
| issn | 2589-9430 |
| language | English |
| publishDate | 2024-01-01 |
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| spelling | doaj-art-42be546316f54b3bb6f9b1260feb36d32025-08-20T03:28:37ZengKeAi Communications Co., Ltd.China Geology2589-94302024-01-0171637910.31035/cg2023040Age and geochemical evolution of granite magmatism in Olkhon region from Caledonian syncollisional ore-free granite to the rare metal granite and pegmatite of Middle Paleozoic intraplate settingViktor Antipin0Valentina Makrygina1Larisa Kushch2Nataliya Sheptyakova3Vinogradov Institute of Geochemistry, SB RAS, 664033 Irkutsk, Russia; First author: E-mail address: vant@igc.irk.ru (Antipin Viktor).Vinogradov Institute of Geochemistry, SB RAS, 664033 Irkutsk, Russia; Corresponding author: E-mail address: vmakr@igc.irk.ru (Makrygina Valentina); k27l27v27@ya.ru (Kushch Larisa).Vinogradov Institute of Geochemistry, SB RAS, 664033 Irkutsk, Russia; Corresponding author: E-mail address: vmakr@igc.irk.ru (Makrygina Valentina); k27l27v27@ya.ru (Kushch Larisa).Vinogradov Institute of Geochemistry, SB RAS, 664033 Irkutsk, RussiaThe detailed description of two granite complexes in the Olkhon subterrane is given. The Early Paleozoic Sharanur complex was formed by granitization of gneisses of the Olkhon series. It includes migmatites, granite-gneisses, granites and pegmatites of normal alkalinity; they belong to the type of syncollisional granites. The Middle Paleozoic Aya granite complex includes mother Aya massif of amazonite-bearing granites and several types of rare-metal pegmatites. They have elevated alkalinity, low of Ba, Sr, and high LILE and HFSE elements contents. The Aya pegmatites lie in northwest cracks of stretching and associated with the rise of the territory under the influence of the North Asian plume. These cracks and pegmatites mark the beginning of a new intraplate geodynamic setting. Two geochemical types are distinguished among the pegmatites of this complex. These are amazonite pegmatites of Li-F type with Ta mineralization and complex type pegmatite with Be-Rb-Nb-Ta and Li-F mineralization (the Ilixin vein). The Tashkiney pegmatite vein is similar to Ilixin, but lies in the gneisses of the Olkhon series. It shows high concentrations of Be, Nb, Ta, as well as W, Sn, but lacks Li and F, due to a greater depth and higher temperature of the melt crystallization of this pegmatite.©2024 China Geology Editorial Office.http://www.sciencedirect.com/science/article/pii/S2096519224000569PegmatiteGeochemistrySubmantle plumeMagmatismCaledonian collisionMiddle Paleozoic intraplate setting |
| spellingShingle | Viktor Antipin Valentina Makrygina Larisa Kushch Nataliya Sheptyakova Age and geochemical evolution of granite magmatism in Olkhon region from Caledonian syncollisional ore-free granite to the rare metal granite and pegmatite of Middle Paleozoic intraplate setting China Geology Pegmatite Geochemistry Submantle plume Magmatism Caledonian collision Middle Paleozoic intraplate setting |
| title | Age and geochemical evolution of granite magmatism in Olkhon region from Caledonian syncollisional ore-free granite to the rare metal granite and pegmatite of Middle Paleozoic intraplate setting |
| title_full | Age and geochemical evolution of granite magmatism in Olkhon region from Caledonian syncollisional ore-free granite to the rare metal granite and pegmatite of Middle Paleozoic intraplate setting |
| title_fullStr | Age and geochemical evolution of granite magmatism in Olkhon region from Caledonian syncollisional ore-free granite to the rare metal granite and pegmatite of Middle Paleozoic intraplate setting |
| title_full_unstemmed | Age and geochemical evolution of granite magmatism in Olkhon region from Caledonian syncollisional ore-free granite to the rare metal granite and pegmatite of Middle Paleozoic intraplate setting |
| title_short | Age and geochemical evolution of granite magmatism in Olkhon region from Caledonian syncollisional ore-free granite to the rare metal granite and pegmatite of Middle Paleozoic intraplate setting |
| title_sort | age and geochemical evolution of granite magmatism in olkhon region from caledonian syncollisional ore free granite to the rare metal granite and pegmatite of middle paleozoic intraplate setting |
| topic | Pegmatite Geochemistry Submantle plume Magmatism Caledonian collision Middle Paleozoic intraplate setting |
| url | http://www.sciencedirect.com/science/article/pii/S2096519224000569 |
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