AUTHOR=Lu Bin , Hou Du-jie , Zou Cai-neng , Li Xi-zhe , Gao Ri-sheng , Wei Heng-ye , Qiu Zhen TITLE=Depositional environment and organic matter enrichment mechanism of the lower cambrian shale in the southern Sichuan Basin JOURNAL=Frontiers in Earth Science VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2025.1509332 DOI=10.3389/feart.2025.1509332 ISSN=2296-6463