1. College of Earth Sciences��Jilin University��Changchun 130061��China; 2. Key- Laboratory for Oil Shale and Coexisting Minerals��Jilin University��Changchun 130061��China

Samples of Yaojia Formation of southeastern uplift area in Songlioa Basin were systematically ana- lyzed by the authors��and the geochemical data indicate that fine grained detrital rocks in this area mostly contain stable components�� The PAAS- standardized distribution curves of trace elements and ��EEs suggest that the material sources of Yaojia Formation in the studied area mainly came from one type of provenance�� The CIA and the Th/U ratio suggest that provenances had underwent moderate weathering processes�� The slight changes of Th/Sc and Zr/ Sc ratios illustrate that there were no second transportation of mudstones and geochemical features were mainly con- trolled by source rocks�� On the basis of discrimination diagrams of tectonic setting of the source rocks and previous research material of former studies��the authors conclude that the provenance of the Yaojia Formation in the studied area was mainly Hercynian and Yanshannian granites��which also involves some Yanshannian intermediate- acid ex- trusive rocks�� Source rocks were formed in the continental margin orogenic belt and belonged to continental island arc volcanic series�� Comprehensive analysis on ratios of Sr/Cu�� Ni/Co�� V/Cr and U/Th shows the arid climate and shallow water with oxygen enrichment of Yaojia Formation deposition��which results in the red color��