Jurassic Paleomagnetic Data From the Eastern Tethyan Himalaya Support a Smaller Greater India
Abstract Knowledge of the original dimension of Greater India in the Jurassic Period is critical for reconstructing the paleogeographic framework of Gondwana. However, two end‐member reconstructions for Greater India (≤1,000 or ≥2,000 km) exist in the Jurassic. Here, we conduct comprehensive petrogr...
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| Language: | English |
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Wiley
2025-07-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2025GL117105 |
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| author | Jie Yuan Chenglong Deng Zhenyu Yang |
| author_facet | Jie Yuan Chenglong Deng Zhenyu Yang |
| author_sort | Jie Yuan |
| collection | DOAJ |
| description | Abstract Knowledge of the original dimension of Greater India in the Jurassic Period is critical for reconstructing the paleogeographic framework of Gondwana. However, two end‐member reconstructions for Greater India (≤1,000 or ≥2,000 km) exist in the Jurassic. Here, we conduct comprehensive petrographic, rock magnetic, and paleomagnetic studies on Lower to Middle Jurassic Lure Formation marlstones from the eastern Tethyan Himalaya. The new paleomagnetic data fulfill stringent quality criteria and provide a reliable Early Jurassic paleopole of 16.6°N/308.8°E, A95 = 1.2°, n = 396 (specimens), which constrains the Tethyan Himalaya to a paleolatitude of 31.8° ± 1.2°S at ca. 177.3 Ma. The overlap of this paleolatitude with the expected paleolatitude of India is consistent with a small Greater India (∼900 km) in the Jurassic. The improved estimate of the dimension of Greater India contributes to an updated reconstruction of the paleogeography of Gondwana during the Early Jurassic. |
| format | Article |
| id | doaj-art-0297e04b2c8d4638b5e6a9a7033ebe22 |
| 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-0297e04b2c8d4638b5e6a9a7033ebe222025-08-20T02:56:24ZengWileyGeophysical Research Letters0094-82761944-80072025-07-015213n/an/a10.1029/2025GL117105Jurassic Paleomagnetic Data From the Eastern Tethyan Himalaya Support a Smaller Greater IndiaJie Yuan0Chenglong Deng1Zhenyu Yang2State Key Laboratory of Lithospheric and Environmental Coevolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaState Key Laboratory of Lithospheric and Environmental Coevolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaCollege of Resources Environment and Tourism Capital Normal University Beijing ChinaAbstract Knowledge of the original dimension of Greater India in the Jurassic Period is critical for reconstructing the paleogeographic framework of Gondwana. However, two end‐member reconstructions for Greater India (≤1,000 or ≥2,000 km) exist in the Jurassic. Here, we conduct comprehensive petrographic, rock magnetic, and paleomagnetic studies on Lower to Middle Jurassic Lure Formation marlstones from the eastern Tethyan Himalaya. The new paleomagnetic data fulfill stringent quality criteria and provide a reliable Early Jurassic paleopole of 16.6°N/308.8°E, A95 = 1.2°, n = 396 (specimens), which constrains the Tethyan Himalaya to a paleolatitude of 31.8° ± 1.2°S at ca. 177.3 Ma. The overlap of this paleolatitude with the expected paleolatitude of India is consistent with a small Greater India (∼900 km) in the Jurassic. The improved estimate of the dimension of Greater India contributes to an updated reconstruction of the paleogeography of Gondwana during the Early Jurassic.https://doi.org/10.1029/2025GL117105 |
| spellingShingle | Jie Yuan Chenglong Deng Zhenyu Yang Jurassic Paleomagnetic Data From the Eastern Tethyan Himalaya Support a Smaller Greater India Geophysical Research Letters |
| title | Jurassic Paleomagnetic Data From the Eastern Tethyan Himalaya Support a Smaller Greater India |
| title_full | Jurassic Paleomagnetic Data From the Eastern Tethyan Himalaya Support a Smaller Greater India |
| title_fullStr | Jurassic Paleomagnetic Data From the Eastern Tethyan Himalaya Support a Smaller Greater India |
| title_full_unstemmed | Jurassic Paleomagnetic Data From the Eastern Tethyan Himalaya Support a Smaller Greater India |
| title_short | Jurassic Paleomagnetic Data From the Eastern Tethyan Himalaya Support a Smaller Greater India |
| title_sort | jurassic paleomagnetic data from the eastern tethyan himalaya support a smaller greater india |
| url | https://doi.org/10.1029/2025GL117105 |
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