| 三叉口地区的地壳形变与地震活动性 |
| |
| 引用本文： | 李建中,刘本培.三叉口地区的地壳形变与地震活动性[J].四川地震,1995(3):15-21. |
| |
| 作者姓名： | 李建中 刘本培 |
| |
| 作者单位： | 四川省地质局地理测量队 |
| |
| 摘 要： | 本文在处理１９６７年以的多期长水准及１９７７年以来多个跨断层短水准，短基线场地数据的基础上分析了三叉口地区的地壳垂直形变，在整个南北构造带上为一上升区，形变速率不高，该地区垂直活动表现为山区相对上升，平原或分别地相对下沉，跨断层的短水准短基线变化，表明该区处在张性应力场中，本文还特别分析了１９８９年石棉５．３级地震的震前，震时又震后的地壳形变特征，并发现类似石棉地震前的及在泸定一石棉间的德妥一带有
|
| 关 键 词： | 断层活动 地震活动性 地壳形变 三叉口地区 |
Crustal Deformation and Seismicity in The Area Where Three Faults Meet |
| |
| Li Jianzhong, Liu Benpei, Peng Changhong.Crustal Deformation and Seismicity in The Area Where Three Faults Meet[J].Earthquake Research in Sichuan,1995(3):15-21. |
| |
| Authors: | Li Jianzhong Liu Benpei Peng Changhong |
| |
| Institution: | Seismological Surveying Party.SBSP |
| |
| Abstract: | In this paper,we analysed the crustal vertical ddformation in the area where three faults meetbased on the muIti-period leveling since 1967 and the short leveling and baseline data in the mul-ti-site across fauIts since 1977.The area is a rising region along the whole north-south tectoniczone.The deformation rate is not high.The vertical activity in the area displays that mountainarea rises and plain or basin falls relatively.The change of short leveling and baseline across fauItsindicates that the area is in extension stress field.Especially,we also analysed the crust deforma-tion characteristics before,in and after the 1989 M5. 3 Shimian earthquake. We found that thedeformation at present is similar in shape to it before the Shimian earthquake. There is the defor-mation anomaly area where the deformation rises step by step from Luding to Shimian. The areacan be a risky region that medium earthquake will occur in future |
| |
| Keywords: | cross-fault crustal deformation measurment vertical dcformation analysis faulting seismic activity |
| 本文献已被 CNKI 维普 等数据库收录！ |
