| Citation: | Zixuan Liu, Detian Yan, Xing Niu. Pyrite Concretions in the Lower Cambrian Niutitang Formation, South China: Response to Hydrothermal Activity. Journal of Earth Science, 2023, 34(4): 1053-1067. doi: 10.1007/s12583-023-1821-7
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The Early Cambrian Niutitang Formation is characterized by wide distribution of black shales on Yangtze Block, South China. Here we have reported the pyrite concretions in the bottom of the Niutitang Formation deposited in the slope-basin environment of Yangtze Block. The pyrite concretion was mainly composed of pyrite associated with hydrothermal minerals (barite, hyalophane, tetrahedrite), followed by quartz and organic matter. Trace elements Mo and U displayed significant enrichment (enrichment factors > 10), indicating the euxinic bottom water condition. Cu, Ni, and excess Ba concentrations were relatively high, denoting high primary productivity.
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