武威-天祝-庄浪河NNW向断裂分段及变形特征

在野外专题考察、大比例尺活断层地质填图、高精度地质剖面及阶地剖面实测的基础上，较系统地讨论了武威－ 天祝－ 庄浪河ＮＮＷ 向断裂的活动时代、变形方式及分段特征。结果表明： 该断裂带是一条典型的全新世活动断裂，整个断裂可分为不同几何结构、不同构造类型、不同变形特征的南、中、北三个断层段。其中北段和中段为隐伏断层，发育有第四纪活动褶皱和１９２７ 年古浪８ 级地震破裂带；南段断裂呈弧形几何形态展布，显示了逆断层构造面的基本特征

SEGMENTATION AND DEFORMATION CHARACTERISTICS OF WUWEI-TIANZHU-ZHUANGLANGHE FAULT ZONE

In this paper, the active date, deformation way and segmentation of Wuwei Tianzhu Zhuanglanghe fault zone are systematically discussed on the basis of the recently special field studies, including the large scale geologic mapping, geologic profile measuring, as well as deformated terrace measuring. The result shows that this fault zone can be divided into three segments, south, middle and north segment, each one has itself different geometric structure, structural type and deformation character. Among them, the north and middle segment are the hidden fault, developing the surface rupture of 1927 Gulang great earthquake and the quaternary active folding, and the south segment shows arcuate geometric pattern and displaies the basic character of compressive deformation of thrust fault.