Eocene magmatism in the Himalaya: Response to lithospheric flexure during early Indian collision?
Eocene mafic magmatism in the Himalaya provides a crucial window for probing the evolution of crustal anatexis processes within the lower plate in a collisional orogen. We report geochemical data from the earliest postcollision ocean-island basalt–like mafic dikes intruding the Tethyan Himalaya near...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Published: |
2023
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| Online Access: | http://purl.org/au-research/grants/arc/FL150100133 http://hdl.handle.net/20.500.11937/96444 |
| _version_ | 1848766153652961280 |
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| author | Ma, L. Wang, Q. Kerr, A.C. Li, Zheng-Xiang Dan, W. Yang, Y.N. Zhou, J.S. Wang, J. Li, C. |
| author_facet | Ma, L. Wang, Q. Kerr, A.C. Li, Zheng-Xiang Dan, W. Yang, Y.N. Zhou, J.S. Wang, J. Li, C. |
| author_sort | Ma, L. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Eocene mafic magmatism in the Himalaya provides a crucial window for probing the evolution of crustal anatexis processes within the lower plate in a collisional orogen. We report geochemical data from the earliest postcollision ocean-island basalt–like mafic dikes intruding the Tethyan Himalaya near the northern edge of the colliding Indian plate. These dikes occurred coeval, and spatially overlap, with Eocene granitoids in the cores of gneiss domes and were likely derived from interaction between melts from the lithosphere-asthenosphere boundary and the Indian continental lithosphere. We propose that these mafic magmas were emplaced along lithospheric fractures in response to lithospheric flexure during initial subduction of the Indian continent and that the underplating of such mafic magmas resulted in orogen-parallel crustal anatexis within the Indian continent. This mechanism can explain the formation of coeval magmatism and the geologic evolution of a collisional orogen on both sides of the suture zone. |
| first_indexed | 2025-11-14T11:46:37Z |
| format | Journal Article |
| id | curtin-20.500.11937-96444 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:46:37Z |
| publishDate | 2023 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-964442024-12-18T01:21:53Z Eocene magmatism in the Himalaya: Response to lithospheric flexure during early Indian collision? Ma, L. Wang, Q. Kerr, A.C. Li, Zheng-Xiang Dan, W. Yang, Y.N. Zhou, J.S. Wang, J. Li, C. Eocene mafic magmatism in the Himalaya provides a crucial window for probing the evolution of crustal anatexis processes within the lower plate in a collisional orogen. We report geochemical data from the earliest postcollision ocean-island basalt–like mafic dikes intruding the Tethyan Himalaya near the northern edge of the colliding Indian plate. These dikes occurred coeval, and spatially overlap, with Eocene granitoids in the cores of gneiss domes and were likely derived from interaction between melts from the lithosphere-asthenosphere boundary and the Indian continental lithosphere. We propose that these mafic magmas were emplaced along lithospheric fractures in response to lithospheric flexure during initial subduction of the Indian continent and that the underplating of such mafic magmas resulted in orogen-parallel crustal anatexis within the Indian continent. This mechanism can explain the formation of coeval magmatism and the geologic evolution of a collisional orogen on both sides of the suture zone. 2023 Journal Article http://hdl.handle.net/20.500.11937/96444 10.1130/G50438.1 http://purl.org/au-research/grants/arc/FL150100133 fulltext |
| spellingShingle | Ma, L. Wang, Q. Kerr, A.C. Li, Zheng-Xiang Dan, W. Yang, Y.N. Zhou, J.S. Wang, J. Li, C. Eocene magmatism in the Himalaya: Response to lithospheric flexure during early Indian collision? |
| title | Eocene magmatism in the Himalaya: Response to lithospheric flexure during early Indian collision? |
| title_full | Eocene magmatism in the Himalaya: Response to lithospheric flexure during early Indian collision? |
| title_fullStr | Eocene magmatism in the Himalaya: Response to lithospheric flexure during early Indian collision? |
| title_full_unstemmed | Eocene magmatism in the Himalaya: Response to lithospheric flexure during early Indian collision? |
| title_short | Eocene magmatism in the Himalaya: Response to lithospheric flexure during early Indian collision? |
| title_sort | eocene magmatism in the himalaya: response to lithospheric flexure during early indian collision? |
| url | http://purl.org/au-research/grants/arc/FL150100133 http://hdl.handle.net/20.500.11937/96444 |