东海西湖凹陷始新统平湖组沉积层序特征及控相机制讨论

Analysis of Depositional Sequence and Controlling Facies Machnism in Pinghu Formation , Xihu Sag ,East China Sea

西湖凹陷平湖组(E_2^(2-3)系海陆过渡相沉积。海平面升降变化控制了不同成因类型砂体的空间展布。在钻井剖面上,可识别多种沉积层序。作者从岩心、测井、古生物诸方面分析了各种沉积层序的形成过程,揭示了海平面升降对沉积过程的控制作用。

Pinghu Formation was deposited in transitional environments in Xihu Sag, The changes of sea level controlled the space distribution of sand bodies with various origins and formed different depositional sequences in the geologic records. The paper analyses forming process of various depositional sequences based on the informaiton including cores,logs and palaeontology and reveals that eustatic movenent mainly controlled the depositional process.