DISCUSSION OF BASIN GENETIC TYPES OF THE QAIDAM BASIN

The Qaidam Basin is a petroliferous basin with multiple genetic types.There are many different view points about its genetic characteristics and mechanisms during different evolution stages.Based on 4 main view points,combined with regional tectonic evolution,sedimentary generation,tectonic history restoration and seismic reflection characteristics,it is concluded in this paper that,the Qaidam Basin has experienced 4 stages: rift-subsidence basin from early to middle Jurassic,compression-inflection basin from late Jurassic to Cretaceous,compression-depression basin during early Tertiary and foreland basin from late Tertiary to Quaternary.This new opinion unifies knowledge about basin genetic types and mechanisms of the Qaidam Basin.It is very important for further research of basin geology and resource evaluation.