| 均衡重力异常和地壳表、浅层地质结构 |
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| 引用本文： | 殷秀华,刘铁胜.均衡重力异常和地壳表、浅层地质结构[J].地震地质,1993,15(2):149-156. |
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| 作者姓名： | 殷秀华 刘铁胜 |
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| 作者单位： | 国家地震局地质研究所，国家地震局地质研究所，国家地震局地质研究所 北京 100029，北京 100029，北京 100029 |
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| 摘 要： | 从理论和试验角度论证了利用均衡重力异常研究地壳表、浅层地质结构的可行性,从而指出:所有合理的地壳均衡模型产生的均衡效应几乎是一样的;地壳均衡模型类型和模型参数的变化,仅使均衡改正值在长波长上发生很小变化,而对均衡重力异常的局部异常影响不大;均衡重力异常与地壳表、浅层地质结构具有明显的对应关系。因此,利用均衡重力异常研究地表和地壳浅层地质结构,以选择简单的地壳均衡模型为好。本方法的优点是不受地形格架影响,便于进行广泛对比和定量研究
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| 关 键 词： | 均衡重力异常 布格重力异常 布格改正 均衡改正 地壳均衡模型 |
ISOSTATIC ANOMALIES OF GRAVITY AND GEOLOGIC STRUCTURES OF THE SURFACE AND SHALLOW CRUST |
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| Yin Xiuhua Liu Tiesheng Liu Zhanpo.ISOSTATIC ANOMALIES OF GRAVITY AND GEOLOGIC STRUCTURES OF THE SURFACE AND SHALLOW CRUST[J].Seismology and Geology,1993,15(2):149-156. |
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| Authors: | Yin Xiuhua Liu Tiesheng Liu Zhanpo |
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| Abstract: | It is demostrated that feasible is to use isostatic anomalies of gravity to study the geologic structures of the surface and shallow crust according to the isostatic theory and relative experiment. It is indicated that all the reasonable isostasy models may give the same effects, various isostasy models and variations of the model parameters will only result in a little variation in isostatic-correction values of long wave length, and that an evident correlation can be found between the isostatic anomalies of gravity and the geologic structures of the surface and shallow crust. Therefore, it is better to select a simple model for the study of the crustal structure.The best advantage of this method lies in its ability of avoiding the effect of landform configuration to carry out an extense comparison as well as a quantitative analysis. |
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| Keywords: | Isostatic anomaly of gravity Bouguer anomaly Bouguer correction Isostasy correction Isostasy model |
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