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

西北地区煤系地层中主要的生烃显微组分是孢子、角、藻类、沥青、碎屑类脂、基等，而树脂、木栓等早期低熟生油组分含量很低。