Diverse Permian magmatism in the Tarim Block, NW China: Genetically linked to the Permian Tarim mantle plume?
Zircon U–Pb ages and geochemical data are reported for the Piqiang oxide-bearing ultramfic–mafic complex, the Bachu mafic dyke swarm, the Yingan and Kaipaizileike basalts and the Halajun A-type granites in the Tarim Block, Northwest China. The Piqiang complex and the Halajun A-type granites were emp...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier Science BV
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/22636 |
| _version_ | 1848750925123944448 |
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| author | Zhang, C. Xu, Y. Li, Zheng-Xiang Wang, H. Ye, H. |
| author_facet | Zhang, C. Xu, Y. Li, Zheng-Xiang Wang, H. Ye, H. |
| author_sort | Zhang, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Zircon U–Pb ages and geochemical data are reported for the Piqiang oxide-bearing ultramfic–mafic complex, the Bachu mafic dyke swarm, the Yingan and Kaipaizileike basalts and the Halajun A-type granites in the Tarim Block, Northwest China. The Piqiang complex and the Halajun A-type granites were emplaced at ca. 276 Ma and ca. 278 Ma, respectively. Together with previously reported geochronological data, the diverse intrusive and extrusive rocks in Tarim show a peak age at ca. 275 Ma. Elemental and Nd isotope geochemistry suggests that the spatially and temporally related Piqiang complex (including some dolerite dykes or stocks) and the Halajun A-type granites were formed via crystal fractionation/accumulation of a common plume-derived parental mafic magma (melting degree > 10%), coupled with variable extents of crustal contamination. Crystal fractionation/accumulation in one or several magma chambers resulted in the diversity of rocks types.The Bachu mafic dyke swarm shares a similar mantle source with the intrusive rocks in the Piqiang–Halajun area but with a relatively lower degree of partial melting (~ 5%). In contrast, the basalts were derived from a time-integrated, enriched lithospheric mantle source as suggested by their high-Ti, LREE- and LILE-enriched trace element signature and negative εNd(t) values (− 2.0 ~ −2.6). The synchronous yet diverse range of Permian igneous rocks in Tarim can best be accounted for by a Permian mantle plume, which is about 15 Ma earlier than the Emeishan plume in southwestern China.Research Highlights ► The ultramafic-mafic complex in Tarim gave a zircon U–Pb age of 276 Ma. ► The A-type granites in Tarim gave a zircon U–Pb age of ca. 278 Ma. ► The diverse Permian intrusive rocks originated from the sub-lithospheric mantle. ► The basalts originated from a time-integrated, enriched lithospheric mantle source. ► Both the intrusive and extrusive rocks are genetically related to a Permian mantle plume. |
| first_indexed | 2025-11-14T07:44:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-22636 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:44:34Z |
| publishDate | 2010 |
| publisher | Elsevier Science BV |
| recordtype | eprints |
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| spelling | curtin-20.500.11937-226362019-02-19T04:26:00Z Diverse Permian magmatism in the Tarim Block, NW China: Genetically linked to the Permian Tarim mantle plume? Zhang, C. Xu, Y. Li, Zheng-Xiang Wang, H. Ye, H. Permian Tarim LIP NW China Ultramafic–mafic complex Mafic dyke swarm Mantle plume A-type granites Basalts Zircon U–Pb ages and geochemical data are reported for the Piqiang oxide-bearing ultramfic–mafic complex, the Bachu mafic dyke swarm, the Yingan and Kaipaizileike basalts and the Halajun A-type granites in the Tarim Block, Northwest China. The Piqiang complex and the Halajun A-type granites were emplaced at ca. 276 Ma and ca. 278 Ma, respectively. Together with previously reported geochronological data, the diverse intrusive and extrusive rocks in Tarim show a peak age at ca. 275 Ma. Elemental and Nd isotope geochemistry suggests that the spatially and temporally related Piqiang complex (including some dolerite dykes or stocks) and the Halajun A-type granites were formed via crystal fractionation/accumulation of a common plume-derived parental mafic magma (melting degree > 10%), coupled with variable extents of crustal contamination. Crystal fractionation/accumulation in one or several magma chambers resulted in the diversity of rocks types.The Bachu mafic dyke swarm shares a similar mantle source with the intrusive rocks in the Piqiang–Halajun area but with a relatively lower degree of partial melting (~ 5%). In contrast, the basalts were derived from a time-integrated, enriched lithospheric mantle source as suggested by their high-Ti, LREE- and LILE-enriched trace element signature and negative εNd(t) values (− 2.0 ~ −2.6). The synchronous yet diverse range of Permian igneous rocks in Tarim can best be accounted for by a Permian mantle plume, which is about 15 Ma earlier than the Emeishan plume in southwestern China.Research Highlights ► The ultramafic-mafic complex in Tarim gave a zircon U–Pb age of 276 Ma. ► The A-type granites in Tarim gave a zircon U–Pb age of ca. 278 Ma. ► The diverse Permian intrusive rocks originated from the sub-lithospheric mantle. ► The basalts originated from a time-integrated, enriched lithospheric mantle source. ► Both the intrusive and extrusive rocks are genetically related to a Permian mantle plume. 2010 Journal Article http://hdl.handle.net/20.500.11937/22636 10.1016/j.lithos.2010.08.007 Elsevier Science BV fulltext |
| spellingShingle | Permian Tarim LIP NW China Ultramafic–mafic complex Mafic dyke swarm Mantle plume A-type granites Basalts Zhang, C. Xu, Y. Li, Zheng-Xiang Wang, H. Ye, H. Diverse Permian magmatism in the Tarim Block, NW China: Genetically linked to the Permian Tarim mantle plume? |
| title | Diverse Permian magmatism in the Tarim Block, NW China: Genetically linked to the Permian Tarim mantle plume? |
| title_full | Diverse Permian magmatism in the Tarim Block, NW China: Genetically linked to the Permian Tarim mantle plume? |
| title_fullStr | Diverse Permian magmatism in the Tarim Block, NW China: Genetically linked to the Permian Tarim mantle plume? |
| title_full_unstemmed | Diverse Permian magmatism in the Tarim Block, NW China: Genetically linked to the Permian Tarim mantle plume? |
| title_short | Diverse Permian magmatism in the Tarim Block, NW China: Genetically linked to the Permian Tarim mantle plume? |
| title_sort | diverse permian magmatism in the tarim block, nw china: genetically linked to the permian tarim mantle plume? |
| topic | Permian Tarim LIP NW China Ultramafic–mafic complex Mafic dyke swarm Mantle plume A-type granites Basalts |
| url | http://hdl.handle.net/20.500.11937/22636 |