| Citation: | Liangxuan Jiao, Zhenbing She, Dominic Papineau, Yaguan Zhang, Matthew S. Dodd, Kenan Cao, Qun Chen, Guoyong Chen. Integrated Stratigraphy and Mineralogy of the Doushantuo Formation in Weng'an, South China, and Implications for Ediacaran Phosphogenesis. Journal of Earth Science, 2024, 35(2): 476-503. doi: 10.1007/s12583-022-1765-3
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The Ediacaran–Cambrian Phosphogenic Episode is the Earth's first true phosphogenic event and resulted in worldwide phosphate deposits, which occurred during the processes of the Neoproterozoic Oxygenation Event. The Ediacaran Doushantuo Formation (ca. 635–551 Ma) of Weng'an area in central Guizhou, South China, contains two economic phosphorite beds (the Lower and Upper Phosphorite Beds). This paper presents a detailed stratigraphic, sedimentological and mineralogical study of multiple outcrop and drill core sections of the Doushantuo Formation across the Weng'an area, and identified 11 lithofacies and 4 types of phosphatic grains. Significant differences in lithofacies and grain types between the upper and lower phosphate deposits are observed, indicating that the two sets of phosphate deposits are the products of two distinct phosphogenic processes. The Lower Phosphorite Bed mainly consists of banded and laminated phosphorites, contains micro-oncoids formed by microbially-mediated precipitation and peloids formed by
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