Palaeomagnetic and geochronologic results from lower cretaceous volcanics of the western Qiangtang terrane and implications for the Lhasa-Qiangtang collision

The Lhasa-Qiangtang collision is key to understanding the formation and evolution of the Tibetan Plateau; however, the precise timing of this event remains hotly debated. To address this uncertainty, we present a combined palaeomagnetic and geochronologic study of Lower Cretaceous Meiriqieco Formation rhyolites from the western Qiangtang terrane. Our geochronologic data reveal an Early Cretaceous (ca. 113-109) age for the Meiriqieco Formation, contradicting previous Late Jurassic assignments. The tilt-corrected site-mean direction yields a palaeopole at 74.3°N, 250.5°E with A<sub>95</sub> = 4.7° (N = 23). Integrating our new and existing palaeomagnetic data, we place the western Qiangtang terrane at ~ 23.1°N during the Early Cretaceous. Comparison with Early Cretaceous palaeomagnetic data from the western Lhasa terrane indicates that convergence of the two terranes occurred no later than the Early Cretaceous (ca. 132-100 Ma).

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Journal
Scientific Reports
Published
2025-11-27
DOI
https://doi.org/10.1038/s41598-025-30138-7
Primary Topic
Geological and Geochemical Analysis
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article
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article

Palaeomagnetic and geochronologic results from lower cretaceous volcanics of the western Qiangtang terrane and implications for the Lhasa-Qiangtang collision

Xianwei Jiao, Jikai Ding, Hanqing Zhao, Jiahui Ma et al.
Scientific Reports
Geological and Geochemical Analysis
article

Palaeomagnetic and geochronologic results from lower cretaceous volcanics of the western Qiangtang terrane and implications for the Lhasa-Qiangtang collision

Xianwei Jiao, Jikai Ding, Hanqing Zhao, Jiahui Ma, Yiming Ma, Huaichun Wu, Suo Wang, Tianshui Yang, Weiwei Bian, Xiao Lin Li, Yabo Zhang, Haiyan Li, Siqi Wang, Jiacheng Liang
article en

Abstract

The Lhasa-Qiangtang collision is key to understanding the formation and evolution of the Tibetan Plateau; however, the precise timing of this event remains hotly debated. To address this uncertainty, we present a combined palaeomagnetic and geochronologic study of Lower Cretaceous Meiriqieco Formation rhyolites from the western Qiangtang terrane. Our geochronologic data reveal an Early Cretaceous (ca. 113-109) age for the Meiriqieco Formation, contradicting previous Late Jurassic assignments. The tilt-corrected site-mean direction yields a palaeopole at 74.3°N, 250.5°E with A<sub>95</sub> = 4.7° (N = 23). Integrating our new and existing palaeomagnetic data, we place the western Qiangtang terrane at ~ 23.1°N during the Early Cretaceous. Comparison with Early Cretaceous palaeomagnetic data from the western Lhasa terrane indicates that convergence of the two terranes occurred no later than the Early Cretaceous (ca. 132-100 Ma).

Scientific ReportsVol. 15(1)
Chinese Academy of Sciences (CN), China Geological Survey (CN), China University of Geosciences (CN), China University of Geosciences (Beijing) (CN), Institute of Geology and Geophysics (CN), Ocean University of China (CN)
Openalex Percentile: Top 62%
Geological and Geochemical Analysis
DOIOpen Access PDFOpenAlex
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