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U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications

Tao Wu Long Xiao Changqian Ma

Tao Wu, Long Xiao, Changqian Ma. U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications[J]. Journal of Earth Science, 2016, 18(3): 461-473. doi: 10.1007/s12583-016-0675-5
引用本文: Tao Wu, Long Xiao, Changqian Ma. U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications[J]. Journal of Earth Science, 2016, 18(3): 461-473. doi: 10.1007/s12583-016-0675-5
Tao Wu, Long Xiao, Changqian Ma. U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications. Journal of Earth Science, 2016, 18(3): 461-473. doi: 10.1007/s12583-016-0675-5
Citation: Tao Wu, Long Xiao, Changqian Ma. U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications. Journal of Earth Science, 2016, 18(3): 461-473. doi: 10.1007/s12583-016-0675-5

U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications

doi: 10.1007/s12583-016-0675-5

U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications

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出版历程
  • 收稿日期:  2016-06-12
  • 修回日期:  2016-06-12
  • 刊出日期:  2016-06-12

U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications

doi: 10.1007/s12583-016-0675-5

摘要: This paper reports geochronological data of detrital zircons from the country rock and sedimentary xenoliths of the Cilincuo pluton (79±0.7 Ma) in the southern Yidun arc belt and the inhe- rited zircons from the Late Triassic granites in the eastern Yidun arc belt, eastern Tibet Plateau. Detrit- al zircons ages from the sedimentary xenoliths have four prominent peaks at 2.5–2.4 Ga, 1.9–1.8 Ga, 480–400 Ma, and 350–300 Ma, whereas those from the country rock exhibit another four prominent peaks at 1.9–1.8 Ga, 850–700 Ma, 480–400 Ma, and 300–250 Ma. Based on comparison with age data from previous studies, we suggest that the sedimentary xenoliths are from the Lanashan Formation and the major provenance of them is Qiangtang Block, Zhongza massif and South China Block, whereas the country rock belongs to the Lamaya Formation and the major provenance of them is similar to those of the neighbouring Songpan-Garzê terrane. In addition, the inherited zircons from the Late Triassic gra- nites in the eastern Yidun arc belts have a prominent Neoproterozoic age population (900–700 Ma), which suggests that there is an old basement with west Yangtze Craton affinity beneath the Triassic se- diments. Combining with previous studies, we propose that the provenances of the formations vary from the Lanashan Formation to the Lamaya Formation which may indicate a record of the final clo- sure of the Garzê-Litang Ocean.

English Abstract

Tao Wu, Long Xiao, Changqian Ma. U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications[J]. Journal of Earth Science, 2016, 18(3): 461-473. doi: 10.1007/s12583-016-0675-5
引用本文: Tao Wu, Long Xiao, Changqian Ma. U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications[J]. Journal of Earth Science, 2016, 18(3): 461-473. doi: 10.1007/s12583-016-0675-5
Tao Wu, Long Xiao, Changqian Ma. U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications. Journal of Earth Science, 2016, 18(3): 461-473. doi: 10.1007/s12583-016-0675-5
Citation: Tao Wu, Long Xiao, Changqian Ma. U-Pb Geochronology of Detrital and Inherited Zircons in the Yidun Arc Belt, Eastern Tibet Plateau and Its Tectonic Implications. Journal of Earth Science, 2016, 18(3): 461-473. doi: 10.1007/s12583-016-0675-5

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