bituminite

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

西北地区侏罗纪煤系地层中主要的生烃分是孢子体、角体、藻类体、沥青体、碎屑类脂体、基镜体等，而树脂体、木栓体等早期低熟生油分低。