油頁岩是煤的兄弟,二者均属于可燃性生物岩,其不同点:油頁岩一般比煤重,煤的比重普通为1.1—1.5油頁岩则为1.4—2.3。煤主要由古代高級植物沉积在沼泽地带經过长期变化分解,然后炭化为煤,而油頁岩則为古代低級动植物,如浮游藻类和浮游动植物的殘骸沉积在湖海底部,在断絕空气的条件下,通过細菌作用而分解,含氧逐漸降低含炭逐渐增高,最后变成油頁岩。 Oil shale is the brother of coal, both of which are combustible biogenic rocks, with the difference that oil shale generally weighs more than coal, and coal has a typical gravity of 1.1-1.5 oil shale versus 1.4-2.3. Coal is mainly decomposed by long-term changes of ancient high-grade plants in swamp areas and then carbonized into coal, whereas oil shale is ancient lower animals and plants. The remains of phytoplankton and plankton are deposited on the bottom of the lake, Under the conditions, through the role of bacteria and decomposition, gradually reduce the oxygen content of carbon gradually increased, and finally into oil shale.