渝东南綦江地区上奥陶统宝塔组碳同位素地层研究及其地质意义

he Upper Ordovician Pagoda Formation is widely distributed in the Yangtze area, with continuous stratigraphic and high degree of research. It is an ideal object for stratigraphic research. A detailed study of stable carbon isotope stratigraphy was carried out on the Upper Ordovician Pagoda Formation in the Qijiang area of southeastern Chongqing. The Guanyinqiao section discovered the forward shift of carbon isotope in the middle and lower parts of the Pagoda Formation, based on the previous human toothed biostratigraphy. And the carbon isotope region comparison analysis confirmed that the carbon isotope drift is a GICE (Guttenberg Isotope Carbon excursion) event. The GICE event can not only become a good indicator of stratigraphic division and contrast, but also can provide new evidence for the study of the formation of the pagoda network.