Based on lots of references, this paper wants to present a systematic analysis to the research methods and achievement about the environment characteristics of paleo-ocean during Dengying Formation of Sinian period at the middle and upper Yangtze region, especially on the three parameters：redox environment of the paleoseawater, paleotemperature and paleosalinity. The results indicate that it is a shallow sea with oxydic water and high paleotemperature and paleosalinity at Dengying Formation, which could give us some evidences to explain some significant change on the climate conditions and biological evolution. There are three unsolved issues of present research as follows, no correlation of the oxidation-deoxidation environment parameters, no direct study absolute depth of paleoseawater and no direct indicator to the paleosalinity. So, it is suggest that we need to build vertical high resolution profiles on some paleoenvironmental parameters, correlate the profiles of different location, analysis the change of oxygen concentration with absolute depth of paleoseawater quantitatively, and seek for the direct indicator to paleosalinity.
Sun Haitao Xie Rui Zhong Dakang Ren Ying Yang Xueqi Zhong Ningcong Jiang Yangjinfeng. Some important issues of the research about paleo-ocean environment of Late Sinian in middle and upper Yangtze region, South China[J]. Chinese Journal of Geology, 2018, 53(2): 697-713.