Evolution of Mesozoic Sedimentary Basins in the Lower Yangtze
Zhang Zongyan
He Weihong
Wei Yi
Ke Xue
Luo Mansheng
Abstract：The Lower Yangtze continent formed during Mesozoic is divided into 5 types of sedimentary basin with different time frames,namely,epeiric sea (T1-2 ),peripheral foreland basin(T3-J 1 ),pressurized basin(T3-J 2 ),fault-depression basin(J 3-K), and pull apart basin (J 3-K)in this paper based on the study of lithostratigraphy,sedimentary formation,biostratigraphic and chronostratigraphic correlation,prototype basin,basin filling sequences,and comprehensive lithofacies paleogeographic analy-sis of the study area in addition.The space distribution framework of Mesozoic Lower Yangtze continental sedimentary basin is established,and the tectonic environment evolution is discussed.It is found that the Triassic-Early Jurassic tectonic phase is re-lated to the evolution of Tethys Sea,which can be divided into two sub-phases of Early-Middle Triassic epeiric sea and Late Triassic foreland basin.The Jurassic-Cretaceous phase transformed to Peri-Pacific tectonic domain can be divided into two sub-phases.Early-Middle Jurassic dominated by compressive tectonic background mainly developed the uplift and erosion areas, whereas Late Jurassic-Cretaceous characterized by an extensional tectonic environment developed a series of NE volcanic-sedi-mentary fault-depression basin and pull apart basin,which in turn formed basin-range tectonic framework.
Keywords：Lower YangtzeMesozoicsedimentologytectonicsbasin evolution
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：18( 1017-1034 )