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在欧洲,虽然莱茵地堑是渐新世最薄的伸展构造,而它的形成仍是一个讨论的课题。事实上,裂谷的南缘是在拉张和挤压构造的基础上形成的。挤压构造以走滑运动为代表,它影响到夹在古生代 Vosges 和渐新世之间的地堑充填物一中生代地层。挤压事件的年代未知,研究者们陆续提出的认识是:(a)与地堑破坏同时代,(b)在地堑破坏之前,或(c)在地堑破坏后形成。在这篇文章中,通过经典的微构造数据证实:(a)σ_1-σ_3面水平的第一次挤压事件出现在渐新世伸展之前,(b)紧接渐新世拉张之后的第二次挤压事件相当于中
In Europe, although the Rhine graben is the thinliest Eocene extension structure, its formation is still a subject of discussion. In fact, the southern margin of the rift was formed on the basis of tension and compression structures. The crustal structure is represented by the strike-slip movement, which affects the graben-filling-Mesozoic strata sandwiched between Paleozoic Vosges and Oligoceses. The age of crushing events is unknown. Researchers have come forward with the following understandings: (a) The same period as the graben was destroyed, (b) Before the graben was damaged, or (c) After the graben was destroyed. In this paper, it is confirmed by the classical micro-structure data that: (a) the first squeezing event at the level of σ_1-σ_3 appears before the Oligocene extension, (b) the The second squeeze incident is equivalent to