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四川广元上寺二叠系—三叠系界线剖面是我国南方该段地层著名剖面之一。对其深入研究,将对二叠系和三叠系界线的确定及对地质历史发展的认识都具有深远意义。本文从沉积岩石学、化石岩石学、地球化学和古生物学及古生态学等方面对该剖面的沉积特征、环境演变以及与生物群更替之关系进行探讨。文中菊石、放射虫和孢粉生物化石分别由盛怀斌、刘桂芳、王乃文和曲立范鉴定;韩国舜承担岩石薄片照相;李红、康育民清绘图件,在此一并表示深切谢意。
The Permian-Triassic Boundary Section of Guangyuan Shangsi, Sichuan Province is one of the well-known stratigraphic sections in the southern part of China. In-depth study of it will have far-reaching significance for the determination of the Permian and Triassic boundaries and for the understanding of geological history. This paper discusses the sedimentary characteristics, environmental evolution and the relationship with the biota turnover from the aspects of sedimentary petrology, fossil-petrology, geochemistry, paleontology and palaeocculture. In this paper, the ammonites, radiolarian and sporo-polluted fossils are identified respectively by Sheng Huibin, Liu Guifang, Wang Naiwen and Qu Lifan; South Korea’s Shun undertakes the photography of rock slices; and Li Hong and Kang Yumin clearly express their deep gratitude in this regard.