bituminite

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体、角体、藻体、沥青体、碎屑脂体、基镜体等，而树脂体、木栓体等早期低熟生油组分含量很低。