中国近海早第三纪海侵层序及地层对比

TERTIARY TRANSGRESSIVE SEQUENCES ANDSTRATIGRAPHIC CORRELATION INCHINA OFFSHORE AREA

中国近海各盆地,据古生物群及沉积特征,在早古新世为陆相沉积,至中晚古新世时为第Ⅰ海侵期。早始新世时为海退期,至中晚始新世为第Ⅱ海侵期。早、中渐新世时为海退期,晚渐新世为第Ⅲ海侵期。在论证地层时代时结合海侵的划分,提出新的见解。海相夹层可作为地层对比的重要标志层。

Palaeogene System in the Taibei Basin of the East China Sea and Neog-ene System in the Zhujiang River Mouth mostly consist of marine deposits. The following conclusions are drawn from the researches of biocoenosis and sedimentography: (1) Terrestrial deposits dominated in Early Palaeocene; (2) Transgression I lasted from that time to Middle and Late Palaeocene; (3) A regressive stage began in Early Eocene; (4) Middle to Late Eocene saw transgression Ⅱ; (5) Early to Middle Oligocene was another regressive stage; (6) Transgression Ⅲ began in Late Oligocene. The division of transgressive stages can help us determine the ages of, contentious strata, therefore marine inter-beds may be used as an important mark for stratigraphic correlation.