黄骅坳陷横向变换带的构造特征及成因

讨论了黄骅坳陷横向变换带的构造特征和成因。根据利用地震反射剖面对盆地构造几何学的研究，圈定了不同尺度的横向变换带，确定了伸展构造背景下的横向变换带是为了保持区域伸展应变调节构造变形的一种调节体系。这种伸展应变守恒是靠三维空间上断层位移沿走向的变化实现的。横向变换带的构造样式为横向地垒状凸起和鼻状凸起或鼻状背斜，并具伸展性质的正断层。横向凸起与非叠复的和叠复的分段断层系伴生及发育在断层位移最小处等事实表明，横向凸起或横向鼻状背斜是由于分段断层系位移沿走向变化形成的。

STRUCTURAL CHARACTERISTICS AND ORIGIN OF TRANSVERSE TRANSFER ZONE IN HUANGHUA SUBBASIN

The characteristics and origin of transverse transfer zone in Cenozoic Huanghua extensional basin are discussed. Based on the study of structural geometry from seismic reflection profiles, the transfer zones occurred at variety of scales are outlined. Transfer zones in extensional setting can be defined as a coordinated system of deformational features conserving regional extensional strain. The strain conservation was accomplished by fault displacement changing in three dimensions along the fault strike. The structural style of transverse transfer zones is characterized by horst shaped highs and nose shaped highs or anticlines with transverse extensional faults. The facts such as the transverse highs associated with nonoverlapping or overlapping faulted segments and developed at local displacement minimum suggest that the transverse highs form as a result of along strike variation in fault displacement.