“…Black shales, primarily developed during certain periods of geological history, not only record the changes in the paleoenvironment and paleoclimate, as well as provide paleontological data but also contain large quantities of metal-rich minerals and oil/gas resources (Hao et al, 2011(Hao et al, , 2013Shi et al, 2021;Laranjeira et al, 2023;Li and Cai, 2023;Zhao et al, 2024). Early Cambrian black shale in the Upper Yangzte Region is an iconic deposit dating from the Neoproterozoic to the Early Paleozoic Era in southern China, which corresponds to the fragmentation and aggregation of the supercontinent, the turbulent changes in marine chemistry and biochemistry, and the episodic replacement of life (Hoffman et al, 1998;Och et al, 2013;Zhang et al, 2014;Guizhou Geological Survey, 2017;Zhu et al, 2019a;Xia et al, 2022).…”