Keywords Xibei area;Jurassic period;Coal measures;Sedimentary basin type;Source depression;Source bed;Microstructure;Compositional analysis;Organic maceral;Hydrocarbon genera tion potential;

• 西北地区;侏罗纪;煤系;沉积盆地类型;生油坳陷;生油层;微观结构;组成分析;有机显微组分;成烃潜力;