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

西北地区侏罗纪煤系地层中主要的生烃分是孢子、角质、藻、青质、碎屑脂、基质镜质等，而树脂、木栓质等早期低熟生油分含量很低。