【摘要】 分析了鄂尔多斯地块南部和渭河盆地构造的空间分布特征 .认为鄂尔多斯地块南部存在 3条NW向隆起带 ,渭河盆地内部存在 3个近EW向斜列的次级沉降中心 .这些隆起带与次级沉降中心及其间的横向隆起共同组成了立交构造 .分析了渭河盆地内部及其周边地区历史地震和现代地震的空间分布 ,发现立交构造对盆地内地震活动有着较强的控制作用 .更多还原

【Abstract】 The space distribution characteristics of structures from topography and landform of the south part of Ordos block and Weihe basin are analyzed.It is considered that three dimensional cross structures are formed by three NW upwarpings of the south part of Ordos block and EW subsidence centers which range obliquely as well as cross uplifts among them in Weihe basin.The space distribution of historical and modern earthquakes in and surrounding the Weihe basin shows that three dimensional cross structures have a strong dominion on seismicity in the basin.更多还原