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对于冀中坳陷乃至渤海湾盆地的形成机制,人们历来强调其近东西向水平拉张作用,认为是上地幔上涌导致上地壳强烈拉张裂陷而形成的,故称之为大陆裂谷盆地。本文以该坳陷霸南地区“花状”结构和逆断特征为出发点,根据区域断裂结构和特征、主次断裂交切关系、凹陷形态与展布,提出该坳陷东部长达300km的牛东—马西断裂系张性右行(南北向)走滑运动的新概念。这一认识将有利于进一步总结该区的地质规律和指导油气勘探的深入,启示人们重新审视整个冀中坳陷乃至渤海湾盆地的形成机理,为区域评价提供新的理论依据。
For the formation mechanism of the Jizhong Depression and even the Bohai Bay Basin, it has always been emphasized that its horizontal pull-in effect in the near east-west direction is thought to be caused by upwelling of the upper mantle resulting in a strong extension of the upper crust. Therefore, it is called the continental rift basin. According to the regional fault structure and characteristics, the relationship between the primary and secondary faults, the shape and distribution of the sag, we propose that the 300-km-long cow in the eastern part of the depression A New Concept of Strike Movement on the Right (North-South) Tension of the East-Massey Fault System. This understanding will be conducive to further summarizing the geology of the area and guiding the exploration of oil and gas. It will inspire people to re-examine the formation mechanism of the whole Jizhong depression and even the Bohai Bay Basin, and provide a new theoretical basis for regional assessment.