陕西铜川晚三叠世孢粉植物群及其环境意义  

Palynoflora and its environmental significance of the Late Triassic in Tongchuan, Shaanxi Province

作　　者：江德昕[1] 王永栋[2] 魏江 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国科学院南京地质古生物研究所,江苏南京210008 [3]美国弗吉尼亚州立诺福克大学,诺福克va23504

出　　处：《古地理学报》2006年第1期23-33,共11页Journal of Palaeogeography：Chinese Edition

基　　金：国家自然科学基金项目(No.40472004)资助

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。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.

关 键 词：铜川 陕西 晚三叠世 孢粉植物群 古气候 沉积环境 

分 类 号：Q913.84[天文地球—古生物学与地层学]