These results indicate occurrence of acid-intermediate magmatic intrusive activities in these areas during the early Middle Devonian and the beginning of the Early Carbonif.

Environmental geology Intensification of tectonic movement in continental China in the Quaternary and its effect on environment;

Due to tectonic movement, palaeotopography and palaeoclimate, the sequence stratigraphy models of Laizhouwan sag are composed of lowstand, transgressive, highstand and fluvialsystem tracts.

An active tectonic movement changes the space shape of stratum and result in periodic stress concussion,which will influence hydrocarbon migration and accumulation as fluid deposit in stratum.