THREE PALEO-OCEANS IN THE EARLY PALEOZOIC AND THEIR CONTROL TO BASINS IN CHINA

The Late Proterozoic-Early Paleozoic ancient plate system centered by Chinese plates and the Ancient China Ocean can be described as 3 oceans and 4 lands.There are 4 big plates seperated by 3 connected oceans: the Siberia Plate(group),the Ancient Middle Asia Ocean and North China Plate group,the Ancient China Ocean and the South China Plate group,the Palaeotethys Ocean and Indian Gondwana.Formation and evolution of the Early Paleozoic basins in China during this era is influenced by ocean expansion and consumption,plate collision or construction orogenic belt and changing earth dynamics,resulting in different prototype basin evolutions.During continent parting period,rift,aulacogen prototype basin and later inner platform depression are formed.The Early Paleozoic plate is small,with typical characteristics of epicontinental basin.Epicontinental depression is important for petroleum reservation during the formation and evolution of orogenic belt.