Unraveling the Lhasa‐Qiangtang Collision in Western Tibet: Insights From Geochronological and Paleomagnetic Analyses
Abstract The Lhasa‐Qiangtang collision closed the Meso‐Tethys Ocean, but the exact timing of this event remains hotly debated. Here, we present geochronological and paleomagnetic analyses conducted on Cretaceous volcanics from western Qiangtang to constrain the Lhasa‐Qiangtang collision in western T...
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| Format: | Article |
| Language: | English |
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Wiley
2024-07-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL110264 |
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| author | Peiping Song Lin Ding Jinxiang Li Yahui Yue Jing Xie |
| author_facet | Peiping Song Lin Ding Jinxiang Li Yahui Yue Jing Xie |
| author_sort | Peiping Song |
| collection | DOAJ |
| description | Abstract The Lhasa‐Qiangtang collision closed the Meso‐Tethys Ocean, but the exact timing of this event remains hotly debated. Here, we present geochronological and paleomagnetic analyses conducted on Cretaceous volcanics from western Qiangtang to constrain the Lhasa‐Qiangtang collision in western Tibet. Our investigations yield a paleolatitude of ∼30.5 ± 5.0°N for western Qiangtang during ca. 110–100 Ma. A reanalysis of previously acquired Mesozoic‐Cenozoic paleomagnetic data from western Qiangtang suggests a stationary position during ca. 136–34 Ma. Examination of paleomagnetic data from western Lhasa reveals a significant reduction in northward paleolatitudinal motion during the Early Cretaceous, dropping from ∼12.3 cm/yr to nearly zero. Integration of our paleomagnetic findings with available geological records has led to conclude that the Lhasa‐Qiangtang collision in western Tibet occurred at ca. 132 Ma. Additionally, we infer that crustal shortening on the order of ∼1,000 km happened between Lhasa and Qiangtang during the Early Cenozoic. |
| format | Article |
| id | doaj-art-bacda18238f1418e910183a12490a3d7 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-bacda18238f1418e910183a12490a3d72025-08-20T01:51:57ZengWileyGeophysical Research Letters0094-82761944-80072024-07-015114n/an/a10.1029/2024GL110264Unraveling the Lhasa‐Qiangtang Collision in Western Tibet: Insights From Geochronological and Paleomagnetic AnalysesPeiping Song0Lin Ding1Jinxiang Li2Yahui Yue3Jing Xie4State Key Laboratory of Tibetan Plateau Earth System Environment and Resources (TPESER) Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing ChinaState Key Laboratory of Tibetan Plateau Earth System Environment and Resources (TPESER) Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing ChinaState Key Laboratory of Tibetan Plateau Earth System Environment and Resources (TPESER) Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing ChinaState Key Laboratory of Tibetan Plateau Earth System Environment and Resources (TPESER) Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing ChinaState Key Laboratory of Tibetan Plateau Earth System Environment and Resources (TPESER) Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing ChinaAbstract The Lhasa‐Qiangtang collision closed the Meso‐Tethys Ocean, but the exact timing of this event remains hotly debated. Here, we present geochronological and paleomagnetic analyses conducted on Cretaceous volcanics from western Qiangtang to constrain the Lhasa‐Qiangtang collision in western Tibet. Our investigations yield a paleolatitude of ∼30.5 ± 5.0°N for western Qiangtang during ca. 110–100 Ma. A reanalysis of previously acquired Mesozoic‐Cenozoic paleomagnetic data from western Qiangtang suggests a stationary position during ca. 136–34 Ma. Examination of paleomagnetic data from western Lhasa reveals a significant reduction in northward paleolatitudinal motion during the Early Cretaceous, dropping from ∼12.3 cm/yr to nearly zero. Integration of our paleomagnetic findings with available geological records has led to conclude that the Lhasa‐Qiangtang collision in western Tibet occurred at ca. 132 Ma. Additionally, we infer that crustal shortening on the order of ∼1,000 km happened between Lhasa and Qiangtang during the Early Cenozoic.https://doi.org/10.1029/2024GL110264 |
| spellingShingle | Peiping Song Lin Ding Jinxiang Li Yahui Yue Jing Xie Unraveling the Lhasa‐Qiangtang Collision in Western Tibet: Insights From Geochronological and Paleomagnetic Analyses Geophysical Research Letters |
| title | Unraveling the Lhasa‐Qiangtang Collision in Western Tibet: Insights From Geochronological and Paleomagnetic Analyses |
| title_full | Unraveling the Lhasa‐Qiangtang Collision in Western Tibet: Insights From Geochronological and Paleomagnetic Analyses |
| title_fullStr | Unraveling the Lhasa‐Qiangtang Collision in Western Tibet: Insights From Geochronological and Paleomagnetic Analyses |
| title_full_unstemmed | Unraveling the Lhasa‐Qiangtang Collision in Western Tibet: Insights From Geochronological and Paleomagnetic Analyses |
| title_short | Unraveling the Lhasa‐Qiangtang Collision in Western Tibet: Insights From Geochronological and Paleomagnetic Analyses |
| title_sort | unraveling the lhasa qiangtang collision in western tibet insights from geochronological and paleomagnetic analyses |
| url | https://doi.org/10.1029/2024GL110264 |
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