Main macerals of hydrocarbon generation are sporinite, cutinite, alginite, bituminite, liptodetrinite and desmocollnite in source rocks from Jurassic coal measure in Northwest China.

西北罗纪煤系层中主要的生烃显微组分是孢子、角质、藻类、沥青质、碎屑类脂、基质镜质，树脂、木栓质早期低熟生油组分含量很低。