摘要
根据区域地质、古生物序列、埋葬学以及生态相容性等资料的综合分析研究,认为西湖凹陷花港组中发现的沟鞭藻和钙质超微化石可能是再沉积的残遗群落,不能作为确定花港组时代的依据。按孢粉和轮藻化石资料将花港组地层时代归属渐新世。
As Huagang FM is one of the oil/gas reservoir in Xihu Sag of East China Sea, it is significant to correctly determine the time of Huagang FM in detailed studying of the sedimentary history, tectonic development, generation, acumulation and migration of oil/gas, thermal history. In this paper, a matter of disputation on the time of Huagang FM is elaborated. Based on the integration of regionl geology, the sequence of pleontology, taphonomy and palaeoecologic stratigraphy, it is considered that Dinoflagellata and Nanno-fossil in the Huagang FM have the possibility of being the relict population, it can not be regarded as the proof of determining the time of Huagang FM. Therefore, the geological time of Huagang FM has been determined to Oligocene according to the Charophyta and Sporopollen in the Huagang FM.
关键词
凹陷
湖泊
花港组
古生物
地质时代
渐新世
The East China Sea,Huagang FM,the sequence of Paleontology Oligocene
