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Detrital Zircon of 4100 Ma in Quartzite in Burang, Tibet

2006; Wiley; Volume: 80; Issue: 6 Linguagem: Inglês

10.1111/j.1755-6724.2006.tb00316.x

1755-6724

Ji Duo, Wen Chun-qi, Xiaoping Fan, JianCi Guo, Zhiyao Ni, Xiaowen Li, Yuruo Shi, Quan Wen,

Geochemistry and Geologic Mapping

Abstract: A detrital zircon aged 4.1 Ga is discovered by the SHRIMP U‐Pb method in a quartzite in Burang County, western Tibet. This is presently the oldest single‐grain detrital zircon in China. The Th‐U ratios of the two testing points of the >4.0 Ga zircon are between 0.76 and 0.86, indicating their magmatic origin. This discovery has offered an important age for investigating the geological evolution of the Qinghai‐Tibet Plateau.