【摘要】 本文是在详细研究了国际二叠系—三叠系界线展型侯选剖面——中国长兴煤山剖面生物事件面、生态地层事件、高分辨率异旋回驱动机制事件、微相及沉积体系的基础上,将晚二叠世长兴期和早三叠世Griesbachian期划分出三个三级层序及百余个高频旋回层或米兰科维奇旋回层,建立了以煤山剖面为主干的,下扬子区跨越不同相区沉积体系、在等时地层格架内的空间配置和层序地层格架。本文还应用生物群生境型,进行了古水深半定量测定和相对海平面变化研究。更多还原

【Abstract】 Three third-rank sequences and over one hundred high-frequency cycles or Milankovitch cycles within the Late Permian Changxingian to Early Triassic Griesbachian are identified in theMeishan section of Changxing in Zhejiang Province-the candidate stratotype section of theglobal Permo-Triassic Boundary, based on detailed studies of the biological, ecological and high-resolution allochthonous cyclic events, microfacies and depositional systems. Furthermore, the stacking pattern of the depositional systems across various Changxingian and Griesbachian sedimentary facies of the Lower Yangtze and the sequence stratigraphic framework are set up with the Meishan section as the principal section. The ecostratigraphic approach has been applied for semiquantitative determination of the water depth in this paper; especially habitat types of fossil biota have been applied to palaeobathymetry and further to relative sea level changes.更多还原