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微组分是孢子、角、藻类、、碎屑类脂、基镜等，而树脂、木栓等早期低熟油组分含量很低。