Inclination shallowing in the Permian/Triassic boundary sedimentary sections of the Middle Volga region in light of the new paleomagnetic data

—The Permian–Triassic magnetostratigraphy of the central East European platform has been updated using evidence from the Zhukov Ravine, Slukino and Okskiy Siyezd reference continental redbed sequences. The new data reveal five rather than four polarity subzones in magnetozone R3P, which thus can be ranked up to orthozone RnP. The upper Permian strata of the Zhukov Ravine and Okskiy Siyezd sections contain intervals of anomalous paleomagnetic directions similar to those revealed earlier in roughly coeval rocks from the Nedubrovo section in the Vologda region. The anomaly may be of regional extent and may correspond to quite a long (thousands of years) span of geomagnetic field stability near the Paleozoic–Mesozoic boundary, which fits the subequatorial dipole field in the first approximation. The paleomagnetic results were used to constrain the position of three new Permian–Triassic paleomagnetic poles of the East European platform, corrected for inclination shallowing: PLat = 54.8°, PLong = 173.6°, dp/dm = 2.6°/4.0° (Zhukov Ravine); PLat = 47.6°, PLong = 164.3°, dp/dm = 3.0°/4.8° (Slukino); PLat = 52.7°, PLong = 153.6°, dp/dm = 3.7°/5.4° (Okskiy Siyezd).

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Inclination shallowing in the Permian/Triassic boundary sedimentary sections of the Middle Volga region in light of the new paleomagnetic data

Cited by 3 publications

References 10 publications

A global apparent polar wander path for the last 320 Ma calculated from site-level paleomagnetic data

A global apparent polar wander path for the last 320 Ma calculated from site-level paleomagnetic data

The new Permian–Triassic paleomagnetic pole for the East European Platform corrected for inclination shallowing

Paleomagnetism and Magnetostratigraphy of Permian–Triassic Reference Sections in the Central Russian Plate: Zhukov Ravine, Slukino, and Okskiy Siyezd

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