Extremely Weak Geomagnetic Field Following Permo‐Carboniferous Reverse Superchron and Its Geological Implications
Abstract Superchrons represent critical phases in geomagnetic field evolution, offering insights into Earth's distinct internal states. However, the lack of research on how the longest Phanerozoic superchron (Permo‐Carboniferous Reverse Superchron, PCRS, ∼318–263 Ma) terminated limits our under...
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| Format: | Article |
| Language: | English |
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Wiley
2025-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2025GL115474 |
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| author | Weijie Zhang Xixi Zhao Congcong Gai Zhaoxia Jiang Zhong Zheng Qingsong Liu |
| author_facet | Weijie Zhang Xixi Zhao Congcong Gai Zhaoxia Jiang Zhong Zheng Qingsong Liu |
| author_sort | Weijie Zhang |
| collection | DOAJ |
| description | Abstract Superchrons represent critical phases in geomagnetic field evolution, offering insights into Earth's distinct internal states. However, the lack of research on how the longest Phanerozoic superchron (Permo‐Carboniferous Reverse Superchron, PCRS, ∼318–263 Ma) terminated limits our understanding of the geodynamic processes and the interaction mechanisms between the Earth's interior and surface environment. Here, we present reliable paleointensity results from lava flows of the Emeishan large igneous province (LIP), emplaced immediately following the permo‐carboniferous reverse superchron termination. Our results reveal that geomagnetic field intensity was exceptionally low during this period, averaging approximately one‐sixth of the modern field intensity. We find that major mass extinctions and environmental deterioration events coincide with extremely low geomagnetic field states and eruptions of LIPs. The observed temporal alignment among the geomagnetic field, biological evolution, and geodynamic processes may reflect associations between Earth's interior and surface processes. |
| format | Article |
| id | doaj-art-b746e802216744faa23f3049f55577e7 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-b746e802216744faa23f3049f55577e72025-08-20T02:56:24ZengWileyGeophysical Research Letters0094-82761944-80072025-07-015213n/an/a10.1029/2025GL115474Extremely Weak Geomagnetic Field Following Permo‐Carboniferous Reverse Superchron and Its Geological ImplicationsWeijie Zhang0Xixi Zhao1Congcong Gai2Zhaoxia Jiang3Zhong Zheng4Qingsong Liu5Department of Ocean Science and Engineering Centre for Marine Magnetism (CM2) Southern University of Science and Technology Shenzhen ChinaDepartment of Ocean Science and Engineering Centre for Marine Magnetism (CM2) Southern University of Science and Technology Shenzhen ChinaDepartment of Ocean Science and Engineering Centre for Marine Magnetism (CM2) Southern University of Science and Technology Shenzhen ChinaKey Lab of Submarine Geosciences and Prospecting Techniques MOE Frontiers Science Center for Deep Ocean Multispheres and Earth System College of Marine Geosciences Ocean University of China Qingdao ChinaZ‐Geology Lab Saitama JapanDepartment of Ocean Science and Engineering Centre for Marine Magnetism (CM2) Southern University of Science and Technology Shenzhen ChinaAbstract Superchrons represent critical phases in geomagnetic field evolution, offering insights into Earth's distinct internal states. However, the lack of research on how the longest Phanerozoic superchron (Permo‐Carboniferous Reverse Superchron, PCRS, ∼318–263 Ma) terminated limits our understanding of the geodynamic processes and the interaction mechanisms between the Earth's interior and surface environment. Here, we present reliable paleointensity results from lava flows of the Emeishan large igneous province (LIP), emplaced immediately following the permo‐carboniferous reverse superchron termination. Our results reveal that geomagnetic field intensity was exceptionally low during this period, averaging approximately one‐sixth of the modern field intensity. We find that major mass extinctions and environmental deterioration events coincide with extremely low geomagnetic field states and eruptions of LIPs. The observed temporal alignment among the geomagnetic field, biological evolution, and geodynamic processes may reflect associations between Earth's interior and surface processes.https://doi.org/10.1029/2025GL115474paleointensityEmeishan LIPhabitabilitygeodynamic processes |
| spellingShingle | Weijie Zhang Xixi Zhao Congcong Gai Zhaoxia Jiang Zhong Zheng Qingsong Liu Extremely Weak Geomagnetic Field Following Permo‐Carboniferous Reverse Superchron and Its Geological Implications Geophysical Research Letters paleointensity Emeishan LIP habitability geodynamic processes |
| title | Extremely Weak Geomagnetic Field Following Permo‐Carboniferous Reverse Superchron and Its Geological Implications |
| title_full | Extremely Weak Geomagnetic Field Following Permo‐Carboniferous Reverse Superchron and Its Geological Implications |
| title_fullStr | Extremely Weak Geomagnetic Field Following Permo‐Carboniferous Reverse Superchron and Its Geological Implications |
| title_full_unstemmed | Extremely Weak Geomagnetic Field Following Permo‐Carboniferous Reverse Superchron and Its Geological Implications |
| title_short | Extremely Weak Geomagnetic Field Following Permo‐Carboniferous Reverse Superchron and Its Geological Implications |
| title_sort | extremely weak geomagnetic field following permo carboniferous reverse superchron and its geological implications |
| topic | paleointensity Emeishan LIP habitability geodynamic processes |
| url | https://doi.org/10.1029/2025GL115474 |
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