Airborne gravity-magnetic anomalies in the Baiyunhu sag,Qiangtang Basin:Characteristics and implications for oil and gas exploration
Airborne gravity-magnetic data are effective in revealing the deep structures of a basin.Based on the latest airborne gravity-magnetic data,combined with field-measured physical property data,this study expounded the characteristics and geological origin of airborne gravity-magnetic anomalies present in the Baiyunhu sag.Using the airborne gravity-magnetic data,this study identified the dis-tribution of faults and magmatic rocks in the Baiyunhu sag.Furthermore,it calculated the burial depth of the magnetic basement and the structural morphologies of the Mesozoic basement in the sag using the artificial tangent method,power spectrum analysis method,and Parker-Oldenburg iterative inversion algorithm.Additionally,this study verified the structural stratification results through the integrated interpretations of gravity and magnetism in target sections.The findings suggest that the undulations of the Mesozoic and Paleozoic sedi-ments in the Baiyunhu sag are the primary cause of gravity anomalies,while the regional airborne magnetic anomaly primarily reflects the distribution features of the Precambrian basement.The deeply buried basement of the Baiyunhu sag,featuring continuously distribu-ted,thick Mesozoic strata and the lack of regional faulting and magmatic activity,is scarcely affected by tectonic movements and posses-ses great potential for oil and gas exploration.
Baiyunhu sagairborne gravity-magnetic anomalystructural stratificationsignificance of oil and gas explorationQiangtang Basin
万方数据
维普
