Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow
There is considerable controversy over the nature of geophysically recognized low-velocity-high-conductivity zones (LV-HCZs) within the Tibetan crust, and their role in models for the development of the Tibetan Plateau. Here we report petrological and geochemical data on magmas erupted 4.7-0.3 Myr a...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Macmillan Publishers Limited
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/30504 |
| _version_ | 1848753107512590336 |
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| author | Wang, Q. Hawkesworth, C. Wyman, D. Chung, S. Wu, F. Li, X. Li, Zheng-Xiang Gou, G. Zhang, X. Tang, G. Dan, W. Ma, L. Dong, Y. |
| author_facet | Wang, Q. Hawkesworth, C. Wyman, D. Chung, S. Wu, F. Li, X. Li, Zheng-Xiang Gou, G. Zhang, X. Tang, G. Dan, W. Ma, L. Dong, Y. |
| author_sort | Wang, Q. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | There is considerable controversy over the nature of geophysically recognized low-velocity-high-conductivity zones (LV-HCZs) within the Tibetan crust, and their role in models for the development of the Tibetan Plateau. Here we report petrological and geochemical data on magmas erupted 4.7-0.3 Myr ago in central and northern Tibet, demonstrating that they were generated by partial melting of crustal rocks at temperatures of 700-1,050°C and pressures of 0.5-1.5 GPa. Thus Pliocene-Quaternary melting of crustal rocks occurred at depths of 15-50 km in areas where the LV-HCZs have been recognized. This provides new petrological evidence that the LV-HCZs are sources of partial melt. It is inferred that crustal melting played a key role in triggering crustal weakening and outward crustal flow in the expansion of the Tibetan Plateau. |
| first_indexed | 2025-11-14T08:19:15Z |
| format | Journal Article |
| id | curtin-20.500.11937-30504 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:19:15Z |
| publishDate | 2016 |
| publisher | Macmillan Publishers Limited |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-305042017-09-13T15:33:14Z Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow Wang, Q. Hawkesworth, C. Wyman, D. Chung, S. Wu, F. Li, X. Li, Zheng-Xiang Gou, G. Zhang, X. Tang, G. Dan, W. Ma, L. Dong, Y. There is considerable controversy over the nature of geophysically recognized low-velocity-high-conductivity zones (LV-HCZs) within the Tibetan crust, and their role in models for the development of the Tibetan Plateau. Here we report petrological and geochemical data on magmas erupted 4.7-0.3 Myr ago in central and northern Tibet, demonstrating that they were generated by partial melting of crustal rocks at temperatures of 700-1,050°C and pressures of 0.5-1.5 GPa. Thus Pliocene-Quaternary melting of crustal rocks occurred at depths of 15-50 km in areas where the LV-HCZs have been recognized. This provides new petrological evidence that the LV-HCZs are sources of partial melt. It is inferred that crustal melting played a key role in triggering crustal weakening and outward crustal flow in the expansion of the Tibetan Plateau. 2016 Journal Article http://hdl.handle.net/20.500.11937/30504 10.1038/ncomms11888 Macmillan Publishers Limited fulltext |
| spellingShingle | Wang, Q. Hawkesworth, C. Wyman, D. Chung, S. Wu, F. Li, X. Li, Zheng-Xiang Gou, G. Zhang, X. Tang, G. Dan, W. Ma, L. Dong, Y. Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow |
| title | Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow |
| title_full | Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow |
| title_fullStr | Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow |
| title_full_unstemmed | Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow |
| title_short | Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow |
| title_sort | pliocene-quaternary crustal melting in central and northern tibet and insights into crustal flow |
| url | http://hdl.handle.net/20.500.11937/30504 |