| 板内地震填空与断层运动型式 |
| |
| 引用本文： | 向宏发,虢顺民.板内地震填空与断层运动型式[J].西北地震学报,1985,7(4):59-68. |
| |
| 作者姓名： | 向宏发 虢顺民 |
| |
| 作者单位： | 国家地震局地质研究所
(向宏发)，国家地震局地质研究所(虢顺民) |
| |
| 摘 要： | 根据人们对板缘地震填空的认识,本文用震级—断层长度的经验关系式分析了我国郯庐断裂带、张家口—烟台断裂带、鲜水河和塔里木盆地北缘等断裂带的地震活动与地质构造的关系。指出在板块内部同样存在着地震沿带逐渐“填满补齐”的现象。这种地震填空,主要发生在那些扭压型和剪滑型的断裂带上。一个基本连续的活动断裂带是板内地震填空所必需的地质条件。作者认为,板内地震填空与断层现代运动的不同型式(或状态)密切相关。一个活动断裂带由稳滑、相对闭锁到破裂位错正是地震空区形成、发展直至发生大地震的带内地震填空过程,与此相应的应变积累段、闭锁段和释放松动段在地质上的差别是:断面上新沉积物覆盖程度依次减小,断层泥粘结度逐次降低而其厚度依次增厚,因而对于那些全新世以来有过活动而断面上新沉积物覆盖较大的一类活断层尤应引起注意。
|
| 收稿时间： | 1985/1/2 0:00:00 |
THE EARTHQUAKE FILLING OF INTERPLATES AND THE TYPES OF FAULT MOTION |
| |
| Xiang Hongfa and Gui Shunmin.THE EARTHQUAKE FILLING OF INTERPLATES AND THE TYPES OF FAULT MOTION[J].Northwestern Seismological Journal,1985,7(4):59-68. |
| |
| Authors: | Xiang Hongfa and Gui Shunmin |
| |
| Institution: | Institute of Geology, State Seismological Bureau and Institute of Geology, State Seismological Bureau |
| |
| Abstract: | In accordance with the knowledge of earthquake packing in the edges of plate, an analysis is made in this article, by means of empirical formula about magnitude and the length of fault, on the relation between the geological structure and the earthquake activities in these fracture zones: Tancheng-Lujiang, Zhangjiakou-Yantai, Xianshuihe and the northern edge of Tarim Basin. It is pointed out that inside plates, there also exists such a phenoninon that earthquakes can always be filled and packed along the fracture zones. This kind of earthquake filling and packing is mainly on the zones of torque-compression type and shear slip type. A continuous active fracture zone is on imperative geological condition for earthquake filling inside plates.The authors propose that there is very close relation between the earthquake filling and the defferent type(or state)of modern fault motion. The progress in which an active fault develops from stable sliding and relative close and lock to rupture and displacement, is just. the process in which gap of earthquake forms, develops and even a great earthquake begins. What is corresponded with this is the segment of stress accumulahion, locked and release. In geology, the difference between them is: new sediment cover on fault is less and less in order; the bond strength of gouge decreases but its thickness increases. So, a special attention must be paid to those active faults with more new sediment on them, which have been activized since Holocene. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《西北地震学报》浏览原始摘要信息 |
| 点击此处可从《西北地震学报》下载免费的PDF全文 |
|
