The Late Triassic palynoflora and its environmental significance in Tongchuan, Shaanxi Province
Jiang Dexin Wang Yongdong Wei Jiang
1 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029
2 Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing 210008
3 Norfolk State University, Norfolk VA 23504 USA
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, and during the late Late Triassic ,the palaeoclimatic conditions and the sedimentary environments were favorable for the formation of coal and natural gas.
