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西安地裂缝所引起的地面沉降及对地面构造物的破坏在国内外尚属罕见,深入研究其成因机制,探索有效的勘查方法,对西安经济持续发展及地学研究具重要意义。浅层地震是探测西安地裂缝最有效的地球物理勘探方法之一,西安地区地震地质条件较好,但表层风积湿陷性黄土分布广泛,地下水位较深是地震勘查的难点。利用浅层高分辨地震查明的临潼-长安断裂和地裂缝深部构造发育特征,并结合区域地质条件对西安地裂缝构造成因机制及地震勘查思路进行探讨,资料可靠,值得参考。
The ground subsidence caused by ground fissures in Xi’an and the destruction of ground structures are still rare at home and abroad. It is of great significance to deeply study its genesis mechanism and explore effective exploration methods, which is of great significance to the sustainable development of economy and geosciences in Xi’an. Shallow earthquakes are one of the most effective geophysical exploration methods to detect ground fissures in Xi’an. The seismic and geological conditions in Xi’an are good, but the distribution of collapsible loess on the surface is widespread and the deep groundwater level is a difficult task in seismic exploration. Based on the deep structure and development characteristics of Lintong - Chang’an fault and fissure as identified by shallow high - resolution earthquakes and the regional geological conditions, the genetic mechanism and seismic exploration of ground fissures in Xi’an are discussed. The data are reliable and worthy of reference.