黄骅坳陷地区正断层位移模式

THE DISPLACEMENT TYPES OF THE NORMAL FAULTS IN HUANGHUA DEPRESSIVE REGION

黄骅坳陷属新生代张性盆地。在第三纪的ＮＷ—ＳＥ向区域拉张作用下，本区形成大量走向ＮＥ—ＳＷ的正断层。通过对该区正断层位移分布的研究，划分出Ｃ、Ｅ、Ｄ、Ｍ和Ｚ型五种断层位移模式，并进一步探讨了诸如断裂生长机制、岩石力学性质、相邻断层的相互作用、次级断裂的相互衔接这样几种控制因素对断层位移分布的影响。

Huanghua depression belongs to the tensile basin in the Cenozoic era. In the Tertiar yperiod, acted by the tension force in NW-SE direction, a lot of normal faults with NE-SW strike formed. With studying on the displacement distribution of the normal faults in this region, such five displacement types of normal faults as C, E, D, M and Z type have been classified as in this region. And such controlling factors influencing on the displacement distribution of the normal faults as the mechanism of fracture development, thecharacteristics of rock mechanics and the inter-connection of secondary fractures have been further discussed.