Petrogeochemical characteristics and U-Pb age of morion-granite rocks in Central Transbaikalia: Classification and genesis problems
Research subject. This article presents data on the age, material composition, petrogenetical and geochemical properties of morion-containing granites in the Etytei and Khamnigadai massifs of Central Transbaikalia.Materials and methods. The composition of rock samples was investigated using the meth...
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| Format: | Article |
| Language: | English |
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A.N. Zavaritsky Institute of Geology and Geochemistry
2020-10-01
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| Series: | Литосфера |
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| Online Access: | https://www.lithosphere.ru/jour/article/view/1341 |
| _version_ | 1831805745160519680 |
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| author | A. L. Elbaev I. V. Gordienko V. B. Khubanov O. V. Zarubina |
| author_facet | A. L. Elbaev I. V. Gordienko V. B. Khubanov O. V. Zarubina |
| author_sort | A. L. Elbaev |
| collection | DOAJ |
| description | Research subject. This article presents data on the age, material composition, petrogenetical and geochemical properties of morion-containing granites in the Etytei and Khamnigadai massifs of Central Transbaikalia.Materials and methods. The composition of rock samples was investigated using the methods of chemical analysis, XRD and ICP-MS; the age was determined by the zircon U–Pb method using SHRIMP and LA-ICP-MS; the mineral composition was studied using an LEO-1430 electron microscope.Results. The massifs composed of morion-containing granites belong to Early Jurassic (190–185 Ma) and form the peripheral area of the Early Mesozoic Khentei-Dauria magmatic region.Conclusion. According to their petrochemical and mineralogical characteristics, the morion-containing granites under study differ from typical intra-plate granitoids and correspond to the “oxidized” A-type granites. The black smoky colour of quartz contained in granite samples is associated with a relatively high radioactivity of rocks caused by the presence of accessory thorium and uranium-containing minerals. |
| first_indexed | 2024-12-22T19:30:00Z |
| format | Article |
| id | doaj.art-232a324943ee42f69fba8018655dbd65 |
| institution | Directory Open Access Journal |
| issn | 1681-9004 2500-302X |
| language | English |
| last_indexed | 2024-12-22T19:30:00Z |
| publishDate | 2020-10-01 |
| publisher | A.N. Zavaritsky Institute of Geology and Geochemistry |
| record_format | Article |
| series | Литосфера |
| spelling | doaj.art-232a324943ee42f69fba8018655dbd652022-12-21T18:15:08ZengA.N. Zavaritsky Institute of Geology and GeochemistryЛитосфера1681-90042500-302X2020-10-0120569070510.24930/1681-9004-2020-20-5-690-7051253Petrogeochemical characteristics and U-Pb age of morion-granite rocks in Central Transbaikalia: Classification and genesis problemsA. L. Elbaev0I. V. Gordienko1V. B. Khubanov2O. V. Zarubina3Geological Institute SB RASGeological Institute SB RASGeological Institute SB RASA.P. Vinogradov Institute of Geochemistry SB RASResearch subject. This article presents data on the age, material composition, petrogenetical and geochemical properties of morion-containing granites in the Etytei and Khamnigadai massifs of Central Transbaikalia.Materials and methods. The composition of rock samples was investigated using the methods of chemical analysis, XRD and ICP-MS; the age was determined by the zircon U–Pb method using SHRIMP and LA-ICP-MS; the mineral composition was studied using an LEO-1430 electron microscope.Results. The massifs composed of morion-containing granites belong to Early Jurassic (190–185 Ma) and form the peripheral area of the Early Mesozoic Khentei-Dauria magmatic region.Conclusion. According to their petrochemical and mineralogical characteristics, the morion-containing granites under study differ from typical intra-plate granitoids and correspond to the “oxidized” A-type granites. The black smoky colour of quartz contained in granite samples is associated with a relatively high radioactivity of rocks caused by the presence of accessory thorium and uranium-containing minerals.https://www.lithosphere.ru/jour/article/view/1341morion-granitesleucogranitesgeochemistrygeochronologycentral transbaikalia |
| spellingShingle | A. L. Elbaev I. V. Gordienko V. B. Khubanov O. V. Zarubina Petrogeochemical characteristics and U-Pb age of morion-granite rocks in Central Transbaikalia: Classification and genesis problems Литосфера morion-granites leucogranites geochemistry geochronology central transbaikalia |
| title | Petrogeochemical characteristics and U-Pb age of morion-granite rocks in Central Transbaikalia: Classification and genesis problems |
| title_full | Petrogeochemical characteristics and U-Pb age of morion-granite rocks in Central Transbaikalia: Classification and genesis problems |
| title_fullStr | Petrogeochemical characteristics and U-Pb age of morion-granite rocks in Central Transbaikalia: Classification and genesis problems |
| title_full_unstemmed | Petrogeochemical characteristics and U-Pb age of morion-granite rocks in Central Transbaikalia: Classification and genesis problems |
| title_short | Petrogeochemical characteristics and U-Pb age of morion-granite rocks in Central Transbaikalia: Classification and genesis problems |
| title_sort | petrogeochemical characteristics and u pb age of morion granite rocks in central transbaikalia classification and genesis problems |
| topic | morion-granites leucogranites geochemistry geochronology central transbaikalia |
| url | https://www.lithosphere.ru/jour/article/view/1341 |
| work_keys_str_mv | AT alelbaev petrogeochemicalcharacteristicsandupbageofmoriongraniterocksincentraltransbaikaliaclassificationandgenesisproblems AT ivgordienko petrogeochemicalcharacteristicsandupbageofmoriongraniterocksincentraltransbaikaliaclassificationandgenesisproblems AT vbkhubanov petrogeochemicalcharacteristicsandupbageofmoriongraniterocksincentraltransbaikaliaclassificationandgenesisproblems AT ovzarubina petrogeochemicalcharacteristicsandupbageofmoriongraniterocksincentraltransbaikaliaclassificationandgenesisproblems |