Geochronology and geochemistry of the Late Jurassic-Early Cretaceous Sangxiu Formation volcanic rocks of the Chegu region, Southern Tibet
The evolution patterns of the Neo-Tethys Himalayas have been a major topic of research, particularly in the Neo-Tethys Ocean. The geological field investigations were conducted in the Late Jurassic-Early Cretaceous Sangxiu Formation in the Tsomei Longzi area of Tibet. A stratigraphic hierarchy of th...
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Frontiers Media S.A.
2023-05-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1171090/full |
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| author | Feng Wu Lixin Wang Lixin Wang Zhitao Huo Jia Liao Yao Tang Tao Yang Xin Li Shijie Wang Hongji Xiao Binhua Cao Binhua Cao |
| author_facet | Feng Wu Lixin Wang Lixin Wang Zhitao Huo Jia Liao Yao Tang Tao Yang Xin Li Shijie Wang Hongji Xiao Binhua Cao Binhua Cao |
| author_sort | Feng Wu |
| collection | DOAJ |
| description | The evolution patterns of the Neo-Tethys Himalayas have been a major topic of research, particularly in the Neo-Tethys Ocean. The geological field investigations were conducted in the Late Jurassic-Early Cretaceous Sangxiu Formation in the Tsomei Longzi area of Tibet. A stratigraphic hierarchy of the Sangxiu Formation was established based on an analysis of the sedimentary lithology in this area. Based on the geochemical characteristics and chronology of the felsic-mafic volcanic rocks of the Sangxiu Formation, the genesis, tectonic background, and evolutionary pattern of the volcanic rocks of the Sangxiu Formation were revealed. Basalts, dolerite, and volcanic debris constitute the volcanic rocks of the Sangxiu Group in the Zhegu area. The Early Cretaceous Sangxiu Formation basalts were determined using SHRIMP zircon U-Pb ages of 141 ± 1 Ma and 142 ± 1 Ma. Volcanic rocks of the Sangxiu Formation, which are intraplate rifting products of the Late Jurassic-Early Cretaceous period, originated from the mantle and mixed with crustal materials. The rock type is an intraplate alkaline basalt that formed during the rifting activity of the passive continental margin extension. There was a crucial growth episode in the Neo-Tethys Ocean during the Late Jurassic and Early Cretaceous. The Neo-Tethys Ocean expansion from the Late Triassic to the Early Cretaceous was caused by a younger rifting along the passive continental edge rather than a continuation of the early Mid-Ocean Ridge development, thus demonstrating the expansion of the Neo-Tethys Ocean at various stages. |
| first_indexed | 2024-04-09T13:45:15Z |
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| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-09T13:45:15Z |
| publishDate | 2023-05-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Earth Science |
| spelling | doaj.art-4c9db6da96ae4a628f1747743d1f40fd2023-05-09T05:02:57ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-05-011110.3389/feart.2023.11710901171090Geochronology and geochemistry of the Late Jurassic-Early Cretaceous Sangxiu Formation volcanic rocks of the Chegu region, Southern TibetFeng Wu0Lixin Wang1Lixin Wang2Zhitao Huo3Jia Liao4Yao Tang5Tao Yang6Xin Li7Shijie Wang8Hongji Xiao9Binhua Cao10Binhua Cao11Changsha General Survey of Natural Resources Centre, China Geological Survey, Changsha, ChinaYantai Center of Coastal Zone Geological Survey, China Geological Survey, Yantai, ChinaSchool of Environmental Studies, China University of Geosciences, Wuhan, ChinaChangsha General Survey of Natural Resources Centre, China Geological Survey, Changsha, ChinaChangsha General Survey of Natural Resources Centre, China Geological Survey, Changsha, ChinaChangsha General Survey of Natural Resources Centre, China Geological Survey, Changsha, ChinaChangsha General Survey of Natural Resources Centre, China Geological Survey, Changsha, ChinaChangsha General Survey of Natural Resources Centre, China Geological Survey, Changsha, ChinaChangsha General Survey of Natural Resources Centre, China Geological Survey, Changsha, ChinaSchool of the Earth Sciences and Resources, China University of Geosciences, Beijing, ChinaYantai Center of Coastal Zone Geological Survey, China Geological Survey, Yantai, ChinaSchool of the Earth Sciences and Resources, China University of Geosciences, Beijing, ChinaThe evolution patterns of the Neo-Tethys Himalayas have been a major topic of research, particularly in the Neo-Tethys Ocean. The geological field investigations were conducted in the Late Jurassic-Early Cretaceous Sangxiu Formation in the Tsomei Longzi area of Tibet. A stratigraphic hierarchy of the Sangxiu Formation was established based on an analysis of the sedimentary lithology in this area. Based on the geochemical characteristics and chronology of the felsic-mafic volcanic rocks of the Sangxiu Formation, the genesis, tectonic background, and evolutionary pattern of the volcanic rocks of the Sangxiu Formation were revealed. Basalts, dolerite, and volcanic debris constitute the volcanic rocks of the Sangxiu Group in the Zhegu area. The Early Cretaceous Sangxiu Formation basalts were determined using SHRIMP zircon U-Pb ages of 141 ± 1 Ma and 142 ± 1 Ma. Volcanic rocks of the Sangxiu Formation, which are intraplate rifting products of the Late Jurassic-Early Cretaceous period, originated from the mantle and mixed with crustal materials. The rock type is an intraplate alkaline basalt that formed during the rifting activity of the passive continental margin extension. There was a crucial growth episode in the Neo-Tethys Ocean during the Late Jurassic and Early Cretaceous. The Neo-Tethys Ocean expansion from the Late Triassic to the Early Cretaceous was caused by a younger rifting along the passive continental edge rather than a continuation of the early Mid-Ocean Ridge development, thus demonstrating the expansion of the Neo-Tethys Ocean at various stages.https://www.frontiersin.org/articles/10.3389/feart.2023.1171090/fullgeochemistrygeochronologySangxiu formationvolcanic rocksSouthern tibet |
| spellingShingle | Feng Wu Lixin Wang Lixin Wang Zhitao Huo Jia Liao Yao Tang Tao Yang Xin Li Shijie Wang Hongji Xiao Binhua Cao Binhua Cao Geochronology and geochemistry of the Late Jurassic-Early Cretaceous Sangxiu Formation volcanic rocks of the Chegu region, Southern Tibet Frontiers in Earth Science geochemistry geochronology Sangxiu formation volcanic rocks Southern tibet |
| title | Geochronology and geochemistry of the Late Jurassic-Early Cretaceous Sangxiu Formation volcanic rocks of the Chegu region, Southern Tibet |
| title_full | Geochronology and geochemistry of the Late Jurassic-Early Cretaceous Sangxiu Formation volcanic rocks of the Chegu region, Southern Tibet |
| title_fullStr | Geochronology and geochemistry of the Late Jurassic-Early Cretaceous Sangxiu Formation volcanic rocks of the Chegu region, Southern Tibet |
| title_full_unstemmed | Geochronology and geochemistry of the Late Jurassic-Early Cretaceous Sangxiu Formation volcanic rocks of the Chegu region, Southern Tibet |
| title_short | Geochronology and geochemistry of the Late Jurassic-Early Cretaceous Sangxiu Formation volcanic rocks of the Chegu region, Southern Tibet |
| title_sort | geochronology and geochemistry of the late jurassic early cretaceous sangxiu formation volcanic rocks of the chegu region southern tibet |
| topic | geochemistry geochronology Sangxiu formation volcanic rocks Southern tibet |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1171090/full |
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