Thermochronology of the Laojunshan–Song Chai Granite Gneiss Massif (North Vietnam, South China)
A reconstruction of the tectonothermal evolution of the Laojunshan–Song Chai granite gneiss massif (North Vietnam, South China) was carried out, based on summaries of the latest isotopic and fission-track dating results. The recorded wide range (420–465 Ma) of the age of granite gneiss rocks testifi...
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MDPI AG
2024-02-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/14/3/251 |
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| author | Alexey Travin Nikolai Murzintsev Nikolai Kruk |
| author_facet | Alexey Travin Nikolai Murzintsev Nikolai Kruk |
| author_sort | Alexey Travin |
| collection | DOAJ |
| description | A reconstruction of the tectonothermal evolution of the Laojunshan–Song Chai granite gneiss massif (North Vietnam, South China) was carried out, based on summaries of the latest isotopic and fission-track dating results. The recorded wide range (420–465 Ma) of the age of granite gneiss rocks testifies to the long-term existence of a partially molten layer at a depth of 20–30 km for several tens of Ma. By the Devonian–early Carboniferous, a section of the excessively thickened crust was denudated, the massif was exhumated to the level of the upper crust, and isotope systems were “frozen”. The rate of uplift of the rocks of the massif is estimated to be about 0.2–0.5 mm/year. In the further history of the granite gneiss massif, episodes of repeated burial to a depth of about 13 km are recorded, associated with the Indosinian collision. The rocks have experienced metamorphism of the amphibolite-green schist facies, accompanied by tectonic transport in the form of a thrust sheet. Over the next 200 Ma, the uplift of the massif and the erosion of the overlying strata occurred in discrete pulses, during a sequence of active tectonic events. Thus, the thermochronological and P-T history of the Laojunshan–Song Chai massif is a kind of chronicle of regional tectonic–thermal events. In the history of the massif, traces of two orogenic cycles associated with the collision of the Cathaysia and Yangtze blocks in the Lower Paleozoic and the Indosinian collision in the Triassic are recorded. |
| first_indexed | 2024-04-24T17:59:44Z |
| format | Article |
| id | doaj.art-bfb8fc02b5af4951a69798240d1f46e3 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-04-24T17:59:44Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-bfb8fc02b5af4951a69798240d1f46e32024-03-27T13:56:13ZengMDPI AGMinerals2075-163X2024-02-0114325110.3390/min14030251Thermochronology of the Laojunshan–Song Chai Granite Gneiss Massif (North Vietnam, South China)Alexey Travin0Nikolai Murzintsev1Nikolai Kruk2V.S. Sobolev Institute of Geology and Mineralogy SB RAS, 3 Akademika Koptyuga Avenue, 630090 Novosibirsk, RussiaV.S. Sobolev Institute of Geology and Mineralogy SB RAS, 3 Akademika Koptyuga Avenue, 630090 Novosibirsk, RussiaV.S. Sobolev Institute of Geology and Mineralogy SB RAS, 3 Akademika Koptyuga Avenue, 630090 Novosibirsk, RussiaA reconstruction of the tectonothermal evolution of the Laojunshan–Song Chai granite gneiss massif (North Vietnam, South China) was carried out, based on summaries of the latest isotopic and fission-track dating results. The recorded wide range (420–465 Ma) of the age of granite gneiss rocks testifies to the long-term existence of a partially molten layer at a depth of 20–30 km for several tens of Ma. By the Devonian–early Carboniferous, a section of the excessively thickened crust was denudated, the massif was exhumated to the level of the upper crust, and isotope systems were “frozen”. The rate of uplift of the rocks of the massif is estimated to be about 0.2–0.5 mm/year. In the further history of the granite gneiss massif, episodes of repeated burial to a depth of about 13 km are recorded, associated with the Indosinian collision. The rocks have experienced metamorphism of the amphibolite-green schist facies, accompanied by tectonic transport in the form of a thrust sheet. Over the next 200 Ma, the uplift of the massif and the erosion of the overlying strata occurred in discrete pulses, during a sequence of active tectonic events. Thus, the thermochronological and P-T history of the Laojunshan–Song Chai massif is a kind of chronicle of regional tectonic–thermal events. In the history of the massif, traces of two orogenic cycles associated with the collision of the Cathaysia and Yangtze blocks in the Lower Paleozoic and the Indosinian collision in the Triassic are recorded.https://www.mdpi.com/2075-163X/14/3/251granitoid batholithgeochronologythermochronologyNortheast VietnamSouthern China |
| spellingShingle | Alexey Travin Nikolai Murzintsev Nikolai Kruk Thermochronology of the Laojunshan–Song Chai Granite Gneiss Massif (North Vietnam, South China) Minerals granitoid batholith geochronology thermochronology Northeast Vietnam Southern China |
| title | Thermochronology of the Laojunshan–Song Chai Granite Gneiss Massif (North Vietnam, South China) |
| title_full | Thermochronology of the Laojunshan–Song Chai Granite Gneiss Massif (North Vietnam, South China) |
| title_fullStr | Thermochronology of the Laojunshan–Song Chai Granite Gneiss Massif (North Vietnam, South China) |
| title_full_unstemmed | Thermochronology of the Laojunshan–Song Chai Granite Gneiss Massif (North Vietnam, South China) |
| title_short | Thermochronology of the Laojunshan–Song Chai Granite Gneiss Massif (North Vietnam, South China) |
| title_sort | thermochronology of the laojunshan song chai granite gneiss massif north vietnam south china |
| topic | granitoid batholith geochronology thermochronology Northeast Vietnam Southern China |
| url | https://www.mdpi.com/2075-163X/14/3/251 |
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