海洋地质前沿2025，Vol.41Issue(6)：54-67,14.DOI:10.16028/j.1009-2722.2024.097
频繁海侵海退下开江-梁平海槽晚二叠世页岩古环境响应及有机质富集机理
Paleo-environmental response and organic matter enrichment of Late Permian shale in Kaijiang-Liangping Trough under frequent transgressive retrogression
摘要
Abstract
The Late Permian is an important transition period in geological history.The shale sedimentary envir-onment in the study area during this period was reconstructed under frequent sea level changes,and the influence of sea level rise and fall on organic matter enrichment was discussed.The analysis of carbon isotopes,maceral components,major and trace elements shows that TOC in the Upper Permian shale ranges from 0.12％to 14.5％,on average of 6.14％,and the organic matter type is type Ⅰ to Ⅲ,which was in the stage of over-mature evolution.The frequent sea level rise and fall in the study area led to complex changes in the sedimentary environment un-der semi-humid to semi-arid climate in anaerobic-anoxic-anaerobic evolution,and the paleoproductivity under-went low-high-low changes with hydrothermal activities.The dominant factor of organic matter enrichment in the Late Permian was paleoproductivity,and there were 6 times of massive organic matter enrichment in the whole period.Frequent sea level rise and fall led to complex and diverse driving factors of paleoproductivity.When sea level rose,upwelling acted to transport nutrients brought by hydrothermal activities,which enhanced the pro-ductivity,while when sea level fell,terrigenous clastic input acted as the main material source to promote paleo-productivity.关键词
古环境恢复/全球海平面/有机质富集/晚二叠世/开江-梁平海槽Key words
paleoenvironmental restoration/global sea level/organic matter enrichment/Upper Permian/Kaiji-ang-Liangping Trough分类
海洋学引用本文复制引用
袁乐欣,徐志明,孙豪飞,路俊刚,尹相东,牟蜚声,顾天甫..频繁海侵海退下开江-梁平海槽晚二叠世页岩古环境响应及有机质富集机理[J].海洋地质前沿,2025,41(6):54-67,14.基金项目
国家自然科学基金"烃源岩早期产物对致密油充注聚集的控制机理研究"(42072185) （42072185）
