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首页> 外文期刊>Journal of Asian earth sciences >Evolutionary characteristics of the sags to the east of Tan-Lu Fault Zone, Bohai Bay Basin (China): Implications for hydrocarbon exploration and regional tectonic evolution
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Evolutionary characteristics of the sags to the east of Tan-Lu Fault Zone, Bohai Bay Basin (China): Implications for hydrocarbon exploration and regional tectonic evolution

机译：中国渤海湾盆地Tan庐断裂带东部凹陷的演化特征：对油气勘探和区域构造演化的启示

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摘要

Some Cenozoic half-grabens (sags) have been found to the east of the Tan-Lu Fault Zone in the Bohai Bay Basin, east China. The evolutionary history of these sags is consistent with the entire Bohai Bay Basin; besides, some remarkable characteristics which had not been mentioned in previous studies of the Bohai Bay Basin are presented, and they are the keys to understand the regional tectonic evolution. Among them, two characteristics are emphasized: (1) the structural and evolutionary features of the sags were markedly changed at about 38 Ma; (2) the Paleogene basin underwent several times of uplifts and denudations during Paleogene. The first characteristic shows that the normal faulting was the dominant structural deformation before 38 Ma, and after then, the strike-slip movement might initiate to influence the basin. The second characteristic indicates remarkable reducing of the present-day residual basin relative to the original basin and, implies the episodic uplifting of the Jiaoliao massif. Besides, our estimation on the hydrocarbon exploration potential of these sags shows that part of them can sustain the formation of medium-large oilfield independently, while, part can contribute to the formation of large oilfield.
机译：在中国东部的渤海湾盆地的-庐断裂带以东发现了一些新生代半岩（凹陷）。这些凹陷的演化历史与整个渤海湾盆地一致。此外，还介绍了渤海湾盆地先前研究中未曾提及的一些显着特征，它们是了解区域构造演化的关键。其中有两个特点：（1）凹陷的结构和演化特征在38 Ma左右发生了明显变化。 （2）古近纪盆地在古近纪经历了几次隆升和剥蚀。第一个特征表明，正断层是38 Ma之前的主要构造变形，此后，走滑运动可能开始影响盆地。第二个特征表明今天的残留盆地相对于原始盆地有显着减少，并且意味着胶辽断块的隆升。此外，我们对这些凹陷的油气勘探潜力的估计表明，它们中的一部分可以独立地维持中大型油田的形成，而另一部分则可以有助于大型油田的形成。

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