Dark mudstone works as good source rock, with middle-good organic abundance, sapropel-humic and humic organic types as well as mature-high mature generation stage.
暗色泥岩有机质丰度中等—好，以腐泥—腐殖型和腐殖型为主，普遍进入成熟—高成熟阶段，是好的烃源岩。
2
Studies on organic geochemistry show that the organic matter of the Tertiary oil-generating rocks in the west is mainly mix-typed, and part of it belongs to sapropel and humic types.