MANY CHANGEMENTS OF REGIONAL TECTONIC STRESS FIELDS OF MESOZOIC ERA IN SOUTH-EAST INNER MONGOLIA

On the basis of a synthetical study of geological structural features in Mesozoic Era in Shuangjing area,Kalaaqin area and Wolitu area,Inner Mongolia,regional tectonic stress events are divided into seven times.Compressive tectonic stress and tensile tectonic stress fields took place alternately,showing that in the Earth occurred elastic movement.The history of the Earth is the course that its elastic movement is situated in the state of continual accommodation and the balance.During the course a variety of formations and structures was formed.Their dynamics is the ground-stress change caused by the Earth rotation.