This implies that they have close affinity, and probably are derived from same metamorphic basement with a crust formation age of late Paleoproterozoic.
表明它们具有明显的亲缘关系，可能来源于具有古元古代晚期地壳形成年龄的同一变质基底。
Therefore, the extensional movement is also one of the mechanisms for controlling formation of the unifying metamorphic basement and sedimentary cover.
由此可以认为伸展构造亦是控制统一变质基底与沉积盖层的形成机制之一。
Kerogen is the leftover material of sporopollen element and lignin in original bodies in different thermal metamorphic period and it is the original material of gas-oil formation.
干酪根主要是母源体中的孢粉素与木质素在埋藏环境中不同热变质阶段的残留物，是油气形成的母源物。
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