| 滇西试验场区地壳的试验均衡研究 |
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| 引用本文： | 申重阳,甘家思,徐菊生,朱思林.滇西试验场区地壳的试验均衡研究[J].大地测量与地球动力学,1994(4). |
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| 作者姓名： | 申重阳 甘家思 徐菊生 朱思林 |
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| 作者单位： | 国家地震局地震研究所 |
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| 摘 要： | 本文利用滇西试验场区最新完全布格重力异常和地形高资料，采用设置虚拟数区和边界限定、消除趋势项、低道滤波等预处理措施，按试验均衡理论，计算了该区地壳的均衡响应函数及试验均衡异常；结合文献［１］的研究结果，对其均衡异常分布特征、区域构造运动机制、活动断裂与强震展布间的关系进行了研究；结果表明：１）该区均衡响应函数值高于美国、加拿大及我国华北等地区，其地壳处于亚均衡状态；２）区内各部位的均衡状态并不均一，且异常幅值大小多与地壳的相对隆起或沉降相关；３）红河断裂带两侧均衡异常值差异明显，全区均衡异常的展布同活动断裂与强震分布有较密切的联系。
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| 关 键 词： | 试验均衡，均衡响应函数，滇西试验场 |
STUDY ON THE CRUST EXPERIMENTAL ISOSTASY IN THE SEISMIC EXPERIMENT FIELD IN THE WEST OF YUNNAN |
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| Shen Chongyang,Gan Jiasi,Xu Jusheng and Zhu Silin.STUDY ON THE CRUST EXPERIMENTAL ISOSTASY IN THE SEISMIC EXPERIMENT FIELD IN THE WEST OF YUNNAN[J].Journal of Geodesy and Geodynamics,1994(4). |
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| Authors: | Shen Chongyang Gan Jiasi Xu Jusheng and Zhu Silin |
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| Abstract: | In this paper based on the experimental isostasy theory and using several preprocessing techniques,such as setting invented data area and boundary constraint,eliminating trend term,the lowpass filter etc.,the crustal isostatic response function and experimental isostasy anomaly have been computed with the recently complete Bouguer gravity anomaly and the elevation data in the Seismic experiment field in the west of Yunnan.In combination with the research results in the literature 3],the isostasy anomaly distribution character,the regional tectonic movement mechanism and the relation between the active faults and the strong earthquakes have been studied. The results show as follows:1)The volume of the isostasy response in this region are higher than in the American,the Canada and the North China etc.,the local crust is at the subisostasy state.2)The local diffrence of isostasy state is inhomogenous ,and the anomaly amplitute is mostly relevant to the relative uplift or down-welling of the crust.3)The volume of the isostaly anomaly are obviously diffrent on the two sides of the Honghe fault zone,the isostasy anomaly is closely related to the active faults and the strong earthquake distribution. |
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| Keywords: | experimental isostasy isostasy response function |
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