中文摘要：

本文基于陕西铜川地区上三叠统永坪组和瓦窑堡组发现的孢子花粉化石28属46种的研究，建立了研究区晚三叠世早期至晚期孢粉植物群。根据孢粉植物群的特征探讨了该区晚三叠世古生态、古气候、古地理和沉积环境。研究结果认为研究区晚三叠世早期古气候和沉积环境有利于石油的形成，晚期古气候和沉积环境有利于煤炭和天然气的形成。

英文摘要：

Based on the investigations of 46 species of fossil spores and pollen belonging to 28 genera which were found from the Yongping Formation and Wayaopu Formation of Upper Triassic in Tongchuan region of Shaanxi Province, the early to late Late Triassic palynoflora in the region was established. According to the characters of the palynoflora, the Late Triassic palaeoecological, palaeoclimatic and palaeogeographic characters as well as the sedimentary environments in the region were discussed. The results indicate that during the early Late Triassic, the palaeoclimatic conditions and the sedimentary environments were favorable for the formation of petroleum, while during the late Late Triassic, the palaeoclimatic conditions and the sedimentary environments were favorable for the formation of coal and natural gas.