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是孢子体、角质体、藻类体、沥青质体、碎屑类脂体、质镜质体等,而树脂体、木栓质体等早期低熟生油量很低。