Detrital zircon U−Pb ages from the Irtysh complex and its constraints on the amalgamation time of Altai and East Junggar terranes

LI Ang; XU Yan; HAN Baofu; LIAO Wen

doi:10.12097/gbc.2022.02.003

2024 Vol. 43, No. 6

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Article navigation > Geological Bulletin of China > 2024 > 43(6): 1032-1046

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LI Ang, XU Yan, HAN Baofu, LIAO Wen. 2024. Detrital zircon U−Pb ages from the Irtysh complex and its constraints on the amalgamation time of Altai and East Junggar terranes. Geological Bulletin of China, 43(6): 1032-1046. doi: 10.12097/gbc.2022.02.003

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LI Ang, XU Yan, HAN Baofu, LIAO Wen. 2024. Detrital zircon U−Pb ages from the Irtysh complex and its constraints on the amalgamation time of Altai and East Junggar terranes. Geological Bulletin of China, 43(6): 1032-1046. doi: 10.12097/gbc.2022.02.003

Detrital zircon U−Pb ages from the Irtysh complex and its constraints on the amalgamation time of Altai and East Junggar terranes

Ministry of Education Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China

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Corresponding author: HAN Baofu, bfhan@pku.edu.cn

Received Date: 09 February 2022

Revised Date: 11 March 2022

Publish Date: 15 June 2024

Abstract

Abstract

The Irtysh complex is located between Altai and East Junggar terranes in Northern Xinjiang and underwent strong metamorphism and deformation, which recorded the tectonic amalgamation of the two terrains. In order to constrain the amalgamation time of the Altai and East Junggar terrains, we used detrital zircon U−Pb ages to analyze and discuss the provenance. The youngest detrital zircon age obtained from the metaclastic rock sample is 354 Ma. Based on a comprehensive analysis of new and published detrital zircon U−Pb age data from the Irtysh complex and a comparison with regional tectonic and magmatic U−Pb age data, this paper proposes that the Irtysh complex may contain older detritus from the passive continental margin of the Altai terrane, in addition to the Late Carboniferous syn−collisional deposits from both of the Altai and East Junggar terranes and only the East Junggar terrane, suggesting that the Altai and East Junggar terranes had been amalgamated when the Irtysh complex was formed.
- Irtysh complex /
- metaclastic rocks /
- provenance analysis /
- detrital zircon

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References

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