The Jiangshan‐Shaoxing‐Pingxiang Fault (JSP Fault) is traditionally considered as the boundary between the Yangtze and Cathaysia blocks in South China. Whether the previously defined Shenshan and Kuli formations located along the JSP fault and near the Xinyu City, Jiangxi Province, are continuous strata or parts of a tectonic mélange is important for understanding the geological history of South China. A carbonaceous phyllite from the area, previously considered as part of the Neoproterozoic Shenshan and Kuli formations, is analyzed palynologically in this study. The Asteridium‐Comasphaeridium acritarch assemblage found in the slate can be correlated with the basal Cambrian Asteridium‐Heliosphaeridium‐Comasphaeridium (AHC) acritarch assemblage in Tarim and the Yangtze Block. The early Cambrian biostratigraphical age assignment for the carbonaceous phyllite indicates the presence of both Neoproterozoic and Cambrian rocks in the sedimentary package, and supports that the package is a part of tectonic mélange rather than a continuous Neoproterozoic strata. The Cambrian slate is the youngest known lithology in the mélange at present.

中文翻译：

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西华夏西部边缘的早期古生代构造混杂岩：有机壁微化石的制约

传统上，江山-绍兴-萍乡断裂（JSP断裂）被认为是华南地区长江与华夏地块之间的边界。沿着JSP断层和江西省新余市附近的先前定义的神山和库里地层是连续地层还是构造混杂岩的一部分，对于了解华南的地质历史很重要。在这项研究中，对该地区的碳质橄榄石（以前被认为是新元古代的神山和库里地层的一部分）进行了分析。所述Asteridium-Comasphaeridium在石板发现疑源类组合可以与基础寒武纪相关联Asteridium-Heliosphaeridium-Comasphaeridium（AHC）塔里木和扬子街区的酋长组合。早期寒武纪生物地层年龄为碳质千枚岩的指示表明该沉积组合中同时存在新元古代和寒武纪岩石，并支持该组合是构造混杂岩的一部分，而不是连续的新元古代地层。寒武纪板岩是目前混杂岩中最年轻的岩性。