| 地块活动与成组地震关系的初步探讨 |
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| 引用本文： | 范俊喜,马瑾,刁桂苓,单新建.地块活动与成组地震关系的初步探讨[J].地震学报,2001,23(5):514-522. |
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| 作者姓名： | 范俊喜 马瑾 刁桂苓 单新建 |
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| 作者单位： | １）中国北京100029中国地震局地质研究所
２）中国北京100029中国地震局构造物理开放实验室
３）中国石家庄050021河北省地震局 |
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| 基金项目： | 国家重点基础研究发展规划项目 (G1 9980 4 0 70 4 0 1 )资助 |
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| 摘 要： | 中国大陆构造的成块性与中国地震活动的成组性构成中国地震构造和地震活动的一个突出现象．本文在前人对中国大陆地震成组划分的结果和地块划分方案的基础上,研究了中国大陆地块与成组地震活动之间的关系,发现大部分强震分布于地块边界断层上,成组地震的孕育和发生与块体活动有关．由成组地震震中分布图表现出来的地块活动方式主要有４种:单缝式活动型、单地块活动型、多地块活动型和地块内部活动型．地块活动频度以单缝式活动型为最高,在成组地震中则以单地块活动型为多．大陆内部各地块的活动性有差别,东部比较活跃的地块有太行山和华北平原地块,西部比较活跃的地块有川滇和昆仑-松潘地块．
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| 关 键 词： | 地块 成组地震 地块活动方式 |
| 文章编号： | 0253-3782(2001)05-0514-09 |
| 修稿时间： | 2001年4月2日 |
CORRELATION BETWEEN MOVEMENT OF TECTONIC BLOCKS AND EARTHQUAKE IN GROUPS |
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| Fan Junxi , Ma Jin , Diao Guiling Shan Xinjian , Institute of Geology,Seismological Bureau of China,Beijing ,China Tectonophysics Laboratory,Seismological Bureau of China,Beijing ,Ch ian Seismologica.CORRELATION BETWEEN MOVEMENT OF TECTONIC BLOCKS AND EARTHQUAKE IN GROUPS[J].Acta Seismologica Sinica,2001,23(5):514-522. |
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| Authors: | Fan Junxi Ma Jin Diao Guiling Shan Xinjian Institute of Geology Seismological Bureau of China Beijing China Tectonophysics Laboratory Seismological Bureau of China Beijing Ch ian Seismologica |
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| Affiliation: | Fan Junxi 1,2) Ma Jin 1,2) Diao Guiling 3) Shan Xinjian 1,2) 1)Institute of Geology,Seismological Bureau of China,Beijing 100029,China 2)Tectonophysics Laboratory,Seismological Bureau of China,Beijing 100029,Ch ian 3)Seismologica |
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| Abstract: | The China continent is divided into some tectonic blocks by nearly NE-and EW- orientated faults. Meanwhile strong earthquakes in the China continent usually c luster in ti me and space. We call "earthquakes in groups". Tectonic blocks separated by fa ul ts and earthquakes in groups are prominent features of the tectonics of the Chin a continent. Correlation between movement of tectonic blocks and groups of earth quakes is discussed in this paper. The results show that earthquakes in groups o ften occurred at one or several block boundary faults. The released elastic stra in energy is built up in the same periods and around blocks. It means that stron g e arthquakes in groups are mainly caused by movement of blocks. Four types of bloc k movement are identified based on group earthquakes: movement along a single b oundary of a block (or a combined blocks), movement of a single block, movement of multi-blocks, and movement in block interiors. If we consider distribution o f all strong earthquakes occurred in the China continent, the movement along a si ngle boundary of a block is more popular one inducing strong earthquakes. But if we only consider earthquakes in groups rather than single earthquakes, the move ment of a block dominates among four modes. Statistics with respect to group ear thqu akes shows that the Taihang Mountain and the North China block are much active i n the eastern China continent, and in western China continent the active blocks are the Sichuan-Yunnan and the Kunlun-Songpan ones. |
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| Keywords: | tectonic block earthquakes in groups types of block movement |
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