Paleomagnetic Constraints on ~90° Rotation of the Caihongqiao section in the Western Hills of Beijing and Its Implications for the Yanshanian Movement in the North China Craton

Q: What does this research mean for the field?

The Caihongqiao section in the Western Hills of Beijing experienced a ~93° clockwise vertical-axis rotation between 149 and 135 Ma during the Yanshanian B-episode. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Ahsan Ali Khan

doi:10.5281/zenodo.22704211

September 11, 2026Open Access

Paleomagnetic Constraints on ~90° Rotation of the Caihongqiao section in the Western Hills of Beijing and Its Implications for the Yanshanian Movement in the North China Craton

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Key Points

Determine the magnitude and timing of tectonic rotation in the Caihongqiao section to constrain the kinematics of the Yanshanian Movement in the North China Craton.
Determined paleomagnetic poles from three distinct stratigraphic units: the late Mesoproterozoic Jingeryu Formation, Cambrian Maozhuang Formation, and Jurassic Nandaling Formation.
Conducted comparative paleomagnetic analyses across the multi-formation sequence to constrain the timing and vertical-axis rotation of the regional deformation.
Obtained paleomagnetic poles for the Jingeryu Formation (12.3°N, 137.1°E), Maozhuang Formation (29.9°S, 80.5°E), and Nandaling Formation (7.7°N, 153.7°E).
Identified a ~93° clockwise vertical-axis rotation of the Caihongqiao section temporally restricted to 149–135 Ma during the Yanshanian B-episode.

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Implication

Paleomagnetic analysis uncovers a ~93° clockwise rotation dated to 149–135 Ma in the North China Craton, highlighting the timing and kinematics of Yanshanian intracontinental deformation.

Abstract

· Three paleomagnetic poles are obtained from late Mesoproterozoic Jingeryu Formation (12.3°N, 137.1°E), Cambrian Maozhuang Formation (29.9°S, 80.5°E), and Jurassic Nandaling Formation (7.7°N, 153.7°E) from the Caihongqiao section, Western Hills of Beijing. · A ~93° clockwise vertical-axis rotation was identified for the Caihongqiao section, which is limited in time to 149–135 Ma during the Yanshanian B-episode for the Western Hills of Beijing. · Multi-formation paleomagnetic comparisons effectively “time-stamp” the deformation event and highlight the efficiency of paleomagnetism for constraining the timing and kinematics of intracontinental tectonic processes.

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Ahsan Ali Khan (2026) studied this question.

synapsesocial.com/papers/6aa7b23b0926e14a848b0a43 https://doi.org/10.5281/zenodo.22704211

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Paleomagnetic Constraints on ~90° Rotation of the Caihongqiao section in the Western Hills of Beijing and Its Implications for the Yanshanian Movement in the North China Craton

Key Points

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Implication

Abstract

Discussion

Cite This Study

Paleomagnetic Constraints on ~90° Rotation of the Caihongqiao section in the Western Hills of Beijing and Its Implications for the Yanshanian Movement in the North China Craton

Key Points

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Implication

Abstract

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Cite This Study

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