【摘要】 对临潼-长安断裂带1970~1996年跨断裂水准资料、1983~2004年跨断层场地水准资料和1992~2004年重力段差资料进行了定量计算与分析。分析结果表明:①临潼-长安断裂是近期非常活跃的断裂,断裂带中主次断裂具有对称活动特点,江伊-鲍坡断裂在该断裂带整体活动中居主动地位;②跨临潼-长安断裂带的麻街和沣峪口两场地在地震前,垂直形变均不同程度地出现准同步快速下降的异常变化,但震后区域应力场的调整过程中两场地的影响存在差异;③临潼-长安断裂带的活动具有明显的分段性特点,形变测量资料分析表明,其南段活动比较稳定,而北段的活动则很活跃;④场地水准与跨断裂水准资料有较好的一致性,重力段差变化与场地垂直形变有较好的相关性。更多还原

【Abstract】 The paper is quantitative calculated and analyzed leveling data across fault from 1970 to 1996,leveling data across fault field of Lintong-Chang’an fault belt from 1983 to 2004,and gravity data across Lintong-Chang’an fault belt from 1992 to 2004.The analysis shows:①Lintong-Chang’an fault is a very active fault in the near future.The primary and secondary faults have cha-racter of symmetrical active in the active fault belts,the Jiangyi-Baopo fault is in the primary position of the all active fault belts.②The vertical deformation showed the difference of degree quasi-synchronism fast decline in the Majie and Fengyukou across fault field of span Lintong-Chang’an fault belt before earthquake,but after earthquake the change showed difference in Majje and Fengyukou across fault field,due to the area structure stress field change.③The action of Lintong-Chang’an fault belt has distinctness section character.According to analysing data across fault field and across fault level,the south section is fairly stable and the north section is very active.④The data across fault field of level and the across fault of level are consistent.Also the gravity change is related with the vertical deformation.更多还原