Characteristics of ground fissures located at Lintong-Chang'an fault zone
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摘要: 简述了临潼—长安断裂带的特征及与地裂缝的关系,根据临潼—长安断裂带内两场地地层勘探剖面,证实了临潼—长安断裂带内地裂缝的存在,表明其与发育在临潼—长安断裂带上盘的西安地裂缝具有相同的性质和特征。同时通过地裂缝两侧地层的错断及厚度变化分析了地裂缝的特点及其地质历史活动规律,表明临潼—长安断裂带内的地裂缝活动受断裂活动影响也表现为东强西弱的特征。Abstract: Lintong-Chang'an fracture zone and its relationship with earth fissures are briefly represented and it is testified in this paper that there exists earth fissures in the fracture zone based on two stratigraphic sections located in Lintong-Chang'an fracture zone. The result shows that the earth fissure developed into fracture zone has the same attribute as that of earth fissure upon hanging wall of Lintong-Chang'an fault. Also, the characteristics of the earth fissure and its activity law are analyzed on the basis of faulted bedding plane and the thickness variation of the same formation. It shows that the activity of earth fissure developed into Lintong-Chang'an fracture zone is varied in different sector: the western is relatively weak but the eastern strong, which is consistent with the fault's activity.
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Key words:
- Lintong-Chang'an fracture zone /
- earth fissure /
- Xi'an /
- activity feature
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