Provenance analysis is of great significance to the study of sedimentation,tectonic evolution and reservoir characteristics in an area.In order to find out the provenance characteristics of the Paleogene Gonjo Formation sandstones in Gonjo Basin,Tibet,this paper analyzes the characteristics of heavy mineral assemblages in the study area,and reveals the provenance direction of the Paleogene Gonjo Formation sandstones in the study area in combination with the previous data.It is believed that the provenance directions of Youzha,Xingda,Banna and other places are from southeast to northwest,and the provenance of Hajiaxiang is not only from the Youzha direction,but also from the adjacent Paleozoic and Triassic igneous rock units in the upper wall of the eastern thrust fault.The characteristics of heavy mineral assemblage and the indexes of ATi and GZi indicate that there are many types of genetic rocks in the provenance area of the Paleogene Gonjo Formation with different contents,mainly intermediate volcanic rocks and less sedimentary rocks.According to the facies mineral characteristics,it is judged that the Paleogene Gonjo Formation sandstone was formed in a shallow-water oxidation environment with different oxidation degree.The oxidation in the southeast is stronger than that in the northwest,the water in Banna is shallower than that in Youzha,and the oxidation degree is stronger.