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Precambrian sedimentary sequences in the eastern Jiangnan Orogen, South China, include the Neoproterozoic Shuangqiaoshan and Xikou Groups and the overlying Nanhua Sequence. U–Pb ages of detrital zircons provide tight constraints on the deposition of the Shuangqiaoshan and Xikou Groups at 831–815Ma and 833–817Ma, respectively. Rocks from the lower parts of these strata contain dominantly Neoproterozoic...
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