Large-scale impregnation of oceanic and continental slab-derived adakitic melts into the mantle wedge
Abstract Mantle wedge metasomatism is a widespread phenomenon in subduction zones. However, details of early melt generation and the extent of metasomatic processes is unclear. Here we document two distinct types of adakitic felsic rocks within the mantle wedge of the North Qaidam ultrahigh-pressure...
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Nature Portfolio
2025-07-01
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| Series: | Communications Earth & Environment |
| Online Access: | https://doi.org/10.1038/s43247-025-02552-2 |
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| author | Pengjie Cai Jaroslaw Majka Dongyang Lian Jingsui Yang Lu Wang Haitao Ma Huichao Rui Rongzong Bo Ahmed E. Masoud |
| author_facet | Pengjie Cai Jaroslaw Majka Dongyang Lian Jingsui Yang Lu Wang Haitao Ma Huichao Rui Rongzong Bo Ahmed E. Masoud |
| author_sort | Pengjie Cai |
| collection | DOAJ |
| description | Abstract Mantle wedge metasomatism is a widespread phenomenon in subduction zones. However, details of early melt generation and the extent of metasomatic processes is unclear. Here we document two distinct types of adakitic felsic rocks within the mantle wedge of the North Qaidam ultrahigh-pressure metamorphic belt. These field observations provide direct evidence for extensive mantle wedge metasomatism. Zircon and apatite U-Pb dating indicates a rapid exhumation and cooling of the subducted plate. Sr-Nd-Hf isotopic analyses, combined with forward phase equilibrium modeling of partial melting, suggest that these adakitic veins formed either through partial melting of a single continental crustal source or by mixing of melts derived from both oceanic and continental crusts. These findings underscore the critical role of melts derived from both oceanic and continental crusts in the growth and evolution of continental crust during collisional orogenic events. |
| format | Article |
| id | doaj-art-bacac532352945aa8a2e083c44dd3655 |
| institution | Kabale University |
| issn | 2662-4435 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Earth & Environment |
| spelling | doaj-art-bacac532352945aa8a2e083c44dd36552025-08-20T03:46:27ZengNature PortfolioCommunications Earth & Environment2662-44352025-07-016111410.1038/s43247-025-02552-2Large-scale impregnation of oceanic and continental slab-derived adakitic melts into the mantle wedgePengjie Cai0Jaroslaw Majka1Dongyang Lian2Jingsui Yang3Lu Wang4Haitao Ma5Huichao Rui6Rongzong Bo7Ahmed E. Masoud8IMM, State Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, Nanjing UniversityDepartment of Earth Sciences, Uppsala UniversityIMM, State Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, Nanjing UniversityIMM, State Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, Nanjing UniversityState Key Laboratory of Geological Processes and Mineral Resources and Center for Global Tectonics, School of Earth Sciences, China University of GeosciencesIMM, State Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, Nanjing UniversityCAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (CAS)IMM, State Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, Nanjing UniversityGeology Department, Faculty of Science, Tanta UniversityAbstract Mantle wedge metasomatism is a widespread phenomenon in subduction zones. However, details of early melt generation and the extent of metasomatic processes is unclear. Here we document two distinct types of adakitic felsic rocks within the mantle wedge of the North Qaidam ultrahigh-pressure metamorphic belt. These field observations provide direct evidence for extensive mantle wedge metasomatism. Zircon and apatite U-Pb dating indicates a rapid exhumation and cooling of the subducted plate. Sr-Nd-Hf isotopic analyses, combined with forward phase equilibrium modeling of partial melting, suggest that these adakitic veins formed either through partial melting of a single continental crustal source or by mixing of melts derived from both oceanic and continental crusts. These findings underscore the critical role of melts derived from both oceanic and continental crusts in the growth and evolution of continental crust during collisional orogenic events.https://doi.org/10.1038/s43247-025-02552-2 |
| spellingShingle | Pengjie Cai Jaroslaw Majka Dongyang Lian Jingsui Yang Lu Wang Haitao Ma Huichao Rui Rongzong Bo Ahmed E. Masoud Large-scale impregnation of oceanic and continental slab-derived adakitic melts into the mantle wedge Communications Earth & Environment |
| title | Large-scale impregnation of oceanic and continental slab-derived adakitic melts into the mantle wedge |
| title_full | Large-scale impregnation of oceanic and continental slab-derived adakitic melts into the mantle wedge |
| title_fullStr | Large-scale impregnation of oceanic and continental slab-derived adakitic melts into the mantle wedge |
| title_full_unstemmed | Large-scale impregnation of oceanic and continental slab-derived adakitic melts into the mantle wedge |
| title_short | Large-scale impregnation of oceanic and continental slab-derived adakitic melts into the mantle wedge |
| title_sort | large scale impregnation of oceanic and continental slab derived adakitic melts into the mantle wedge |
| url | https://doi.org/10.1038/s43247-025-02552-2 |
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