Yi Xue

• Lu, Hongliang; Huang, Baochun; Li, Mingsong; Zhao, Qian; Li, Xiang & Liao, Yilian [Show all 11 contributors for this article] (2026). Synchronous end-Permian mass extinction zenith in marine and low-middle latitude terrestrial North China. Proceedings of the National Academy of Sciences of the United States of America (PNAS). ISSN 0027-8424. 123(45). doi: 10.1073/pnas.2538105123. Full text in Research Archive Show summary

  The end-Permian mass extinction was the most severe biotic crisis of the Phanerozoic, yet temporal synchrony between marine and terrestrial extinctions remains debated due to correlation uncertainties. Here, we present an integrated magnetostratigraphic, cyclostratigraphic, and carbon-isotope and mercury (Hg) chemostratigraphic record from the fluvial Upper Shihhotse, Sunjiagou, and Liujiagou formations at the Sigou section, North China. We identify 14 magnetozones spanning the late Changhsingian to late Olenekian, constrained by a floating timescale based on gamma-ray cyclostratigraphy and subsequently anchored through magnetostratigraphic correlation. Our chronostratigraphy reveals a Hg peak at 252.4 Ma, aligning with the main eruptive phase of the Siberian Traps Large Igneous Province, while the carbon isotope excursion onset (252.1 Ma) and minimum (252.0 Ma) are synchronous with the Meishan Global Stratotype Section and Point. Furthermore, the Induan–Olenekian boundary is positioned below magnetozone SG4n, constraining the Induan Stage duration to 1.6 to 1.8 My. These findings establish a high-resolution chronostratigraphic framework for the Permian–Triassic boundary in North China, supporting a synchronous extinction zenith across marine and low–middle latitude terrestrial ecosystems, with latitudinal diachroneity relative to high-latitude and tropical landmasses.

• Xue, Yi; Domeier, Mathew Michael; Silkoset, Petter; Gallo, Leandro Cesar; Tonti-Filippini, Justin Antony Dean & Walderhaug, Harald James (2026). Cryptic Paleomagnetic Complexity in the Ediacaran Egersund Dikes. Geochemistry Geophysics Geosystems. 27(5). doi: 10.1029/2025GC012730. Full text in Research Archive Show summary

  The Ediacaran Period (∼635–539 Ma) represents a critical interval in Earth's evolution, yet its paleomagnetic record remains complex and contentious. One of the few Ediacaran paleomagnetic results from Baltica considered robust is a pole from the ca. 616 Ma Egersund dikes in southwest Norway, which is interpreted to represent a primary thermoremanent magnetization. However, we report on a new paleomagnetic and rock magnetic investigation of these dikes that suggests that their paleomagnetic record is more complex than previously recognized. Our results reveal a multicomponent remanence structure, and we identify a new high-temperature component that positive baked contact tests suggest to be the primary thermoremanent magnetization. Together with microscopic and geochemical analyses, we demonstrate that another distinct component represents a remagnetization acquired during Caledonian orogenesis. Although we also identified a stable direction similar to that interpreted as the primary component in earlier studies, our analysis suggests this component may be an artifact resulting from vector overlap of the other components. The origins of two additional directions, which deviate markedly from the other components and known Phanerozoic reference directions, remain uncertain. They may reflect transitional geomagnetic states, hinting at the possibility of a more dynamic and unstable Ediacaran geomagnetic field. Our revised pole position (20.8°N, 89.0°E) differs from earlier results by more than 40°, with important implications for Baltica's paleogeographic evolution. This study underscores the value of integrated approaches and highlights the importance of reinvestigating key paleomagnetic results, particularly from data-poor intervals of time and space.

• Yan, Yonggang; Huang, Baochun; Zhang, Peizhen; Zhao, Jie; Zhang, Donghai & Jia, Shufei [Show all 8 contributors for this article] (2024). Paleomagnetic constraint on the movement of the Indochina Block since Late Paleozoic: Progress and prospect. Kexue Tongbao/Chinese Science Bulletin. ISSN 0023-074X. 69(18), p. 2498–2517. doi: 10.1360/TB-2023-0884. Full text in Research Archive

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• Xue, Yi; Domeier, Mathew Michael; Silkoset, Petter; Gallo, Leandro C.; Kulakov, Evgeniy & Boer, Rosa de [Show all 7 contributors for this article] (2024). Revisiting the paleomagnetism of the Egersund dikes. Full text in Research Archive
• Xue, Yi; Domeier, Mathew Michael; Silkoset, Petter; Kulakov, Evgeniy; Gallo, Leandro C. & Boer, Rosa de [Show all 7 contributors for this article] (2023). Revisiting the paleomagnetism of the Egersund dikes. Full text in Research Archive

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