| 南北地震带北段深部构造特征 |
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| 引用本文： | 梁桂培,李渭娟.南北地震带北段深部构造特征[J].地震学报,1990,12(2):176-185. |
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| 作者姓名： | 梁桂培 李渭娟 |
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| 作者单位： | 国家地震局兰州地震研究所 |
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| 摘 要： | 本文利用重力资料,采用单层地壳模式反演南北地震带北段的地壳厚度.根据艾利均衡假设,进行均衡补偿归算.编制莫氏界面图和11均衡异常图.根据地壳构造特征,划分六个地壳构造区.对天水-文县间立交构造格架进行初步的探讨.结合历史地震资料,讨论了地壳构造、均衡异常与地震的关系.
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| 关 键 词： | 压缩质面法 立交构造 南北地震带 |
THE CHARACTERISTICS OF DEEP STRUCTURE OF THE NORTH SEGMENT OF THE NORTH-SOUTH SEISMIC BELT |
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| Institution: | Lanzhou Sei'smologieal Institute, State Setsmolagical Bureau |
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| Abstract: | In the paper,the crustal thickness of the north segment of the North-South Seismic Belt is inverted by means of gravity data and a single crustal model. According to the Airy isostatic hypothesis,computation of isostatic compensation is made and a map of the M surface and a 11 map of isostatic anomaly are drawn up.According to the characteristics of crustal structures,six regions of crustal structure are delineated. Preliminary discussion of the stereoscopic cross structure between Tianshui and Wenxian is made. In the light of historical data of earthquakes,the relationship between crustal stracture,isostatic anomaly and earthquakes is discussed. |
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