Paleozoic Episodic Magmatism in Western Tianshan: Insight Into Assembling the Northeastern Pangea
Abstract The late‐stage union of Pangea was associated with the convergence of Siberia with Laurussia, but the exact timing remains unclear. The orogenic duration of the Kazakhstan block can provide geochronological constraints as it connects Siberia, Baltica, and Tarim. Zircon petrochronology offer...
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| Format: | Article |
| Language: | English |
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Wiley
2024-07-01
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| Series: | Geochemistry, Geophysics, Geosystems |
| Online Access: | https://doi.org/10.1029/2023GC011329 |
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| author | Kai Wang Keda Cai Min Sun Chun‐Kit Lai Xiao‐Ping Xia Xiangsong Wang Zihe Bao |
| author_facet | Kai Wang Keda Cai Min Sun Chun‐Kit Lai Xiao‐Ping Xia Xiangsong Wang Zihe Bao |
| author_sort | Kai Wang |
| collection | DOAJ |
| description | Abstract The late‐stage union of Pangea was associated with the convergence of Siberia with Laurussia, but the exact timing remains unclear. The orogenic duration of the Kazakhstan block can provide geochronological constraints as it connects Siberia, Baltica, and Tarim. Zircon petrochronology offers a reliable approach for ascertaining the lifespan of an ancient orogen. In this study, we explore three phases of magmatism recorded in detrital zircons from late Paleozoic and Mesozoic sandstone‐siltstones in Western Tianshan, that is, 400–470 Ma, 320–380 Ma, and 280–320 Ma. Based on their age‐propagated Hf isotopes, melt SiO2 contents, and crustal thicknesses, our findings suggest that the southern limb of Kazakhstan underwent the early Paleozoic amalgamation of microcontinents with arcs, the late Paleozoic maturation of an Andean‐like continental arc, and the late Carboniferous collision of Kazakhstan with the Junggar oceanic basin and the Tarim craton. Such characteristics manifest the long‐term orogenic progression of Kazakhstan. Combining published timelines and paleolatitudes of major orogens and blocks, we propose that the Kazakhstan block welded northeastern Pangea along with the cessation of these orogenic activities around it. Consequently, by docking Kazakhstan with surrounding cratons, the fundamental configuration of Pangea could have been established in the late Carboniferous. |
| format | Article |
| id | doaj-art-e03e9f05ed694529b31fd7e62024c182 |
| institution | OA Journals |
| issn | 1525-2027 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj-art-e03e9f05ed694529b31fd7e62024c1822025-08-20T01:50:11ZengWileyGeochemistry, Geophysics, Geosystems1525-20272024-07-01257n/an/a10.1029/2023GC011329Paleozoic Episodic Magmatism in Western Tianshan: Insight Into Assembling the Northeastern PangeaKai Wang0Keda Cai1Min Sun2Chun‐Kit Lai3Xiao‐Ping Xia4Xiangsong Wang5Zihe Bao6School of Earth Sciences and Resources Frontiers Science Center for Deep‐time Digital Earth China University of Geosciences Beijing ChinaSchool of Earth Sciences and Resources Frontiers Science Center for Deep‐time Digital Earth China University of Geosciences Beijing ChinaDepartment of Earth Sciences The University of Hong Kong Hong Kong ChinaGlobal Project Generation and Targeting Fortescue Metals Group Ltd. East Perth WA AustraliaState Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou ChinaDepartment of Earth Sciences The University of Hong Kong Hong Kong ChinaXinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi ChinaAbstract The late‐stage union of Pangea was associated with the convergence of Siberia with Laurussia, but the exact timing remains unclear. The orogenic duration of the Kazakhstan block can provide geochronological constraints as it connects Siberia, Baltica, and Tarim. Zircon petrochronology offers a reliable approach for ascertaining the lifespan of an ancient orogen. In this study, we explore three phases of magmatism recorded in detrital zircons from late Paleozoic and Mesozoic sandstone‐siltstones in Western Tianshan, that is, 400–470 Ma, 320–380 Ma, and 280–320 Ma. Based on their age‐propagated Hf isotopes, melt SiO2 contents, and crustal thicknesses, our findings suggest that the southern limb of Kazakhstan underwent the early Paleozoic amalgamation of microcontinents with arcs, the late Paleozoic maturation of an Andean‐like continental arc, and the late Carboniferous collision of Kazakhstan with the Junggar oceanic basin and the Tarim craton. Such characteristics manifest the long‐term orogenic progression of Kazakhstan. Combining published timelines and paleolatitudes of major orogens and blocks, we propose that the Kazakhstan block welded northeastern Pangea along with the cessation of these orogenic activities around it. Consequently, by docking Kazakhstan with surrounding cratons, the fundamental configuration of Pangea could have been established in the late Carboniferous.https://doi.org/10.1029/2023GC011329 |
| spellingShingle | Kai Wang Keda Cai Min Sun Chun‐Kit Lai Xiao‐Ping Xia Xiangsong Wang Zihe Bao Paleozoic Episodic Magmatism in Western Tianshan: Insight Into Assembling the Northeastern Pangea Geochemistry, Geophysics, Geosystems |
| title | Paleozoic Episodic Magmatism in Western Tianshan: Insight Into Assembling the Northeastern Pangea |
| title_full | Paleozoic Episodic Magmatism in Western Tianshan: Insight Into Assembling the Northeastern Pangea |
| title_fullStr | Paleozoic Episodic Magmatism in Western Tianshan: Insight Into Assembling the Northeastern Pangea |
| title_full_unstemmed | Paleozoic Episodic Magmatism in Western Tianshan: Insight Into Assembling the Northeastern Pangea |
| title_short | Paleozoic Episodic Magmatism in Western Tianshan: Insight Into Assembling the Northeastern Pangea |
| title_sort | paleozoic episodic magmatism in western tianshan insight into assembling the northeastern pangea |
| url | https://doi.org/10.1029/2023GC011329 |
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