A U-bearing bitumen vein with uranium anomalies (~ 70×10-6,several locations) was identified in Qingchuan County,Guangyuan City,northern Sichuan Basin.The mineralogy,element geochemistry,and spectroscopy analyses were carried out for this U-bearing bitumen vein,with comparison to the“organic matters”in the nearby typical sandstone type uranium deposit (303 deposit).The U-bearing bitumen vein contains a large number of micro-grained minerals,including micro-sized quartz, barite,chalcopyrite,sphalerite,galena and strawberry-like pyrite with micro—nano structures.The bitumen vein is highly enriched in Mo,Re,Cd,U,and Ba,with slightly elevated Sc,V,Ni,Cu,Zn,Rb,Tl contents.Similar uranium-and bitumen-bearing veins have also been found in the 303 sandstone-type uranium deposit,with similar mineralogy (barite—pyrite—sphalerite and other minerals)and trace element concentrations.It is suggested that the uranium mineralization in northern Sichuan may be genetically related to the cracking and destruction of paleo-oil reservoirs.In the tectonic active area in the Sichuan Basin,it might be potential to find uranium deposits related to oil—gas activities.The U,Mo,and Re contents in the bitumen veins are all significantly enriched and could be comprehensively utilized after the bitumen was burned,it is therefore recommended to pay attention to these bitumen veins for comprehensive utilization of the aforementioned associated elements in future in northern Sichuan.