山区地形起伏对重力异常及其校正的影响分析
首发时间:2008-09-23
摘要:山形异常通常表现为与地形起伏呈现相关性,会影响对重力资料的正确解释,应当对其进行消除。本文通过正演模型试验,对起伏地形对山区重力异常及其校正的影响进行了分析,认为:对山形异常进行准确校正后,可以消除地形起伏的影响;若仍然存在“山形异常”,则应考虑是地下异常构造的反映,是重力反演解释的重要信息。不能简单的以是否消除重力异常和地形起伏的相关性为判断标准。在复杂山区,很难通过单一勘探方法进行地质解释,发展综合地球物理勘探是进行有效勘探的途径。
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The impact of undulate terrain on gravity anomaly and terrain correction
Abstract:Mount-shape gravity anomaly affects the correct geological interpretation, should be removed. In this paper, the impact of undulate terrain on gravity anomaly and terrain correction is analyzed. By terrain correction, the impact of undulate terrain can be removed. If there is still mount-shape gravity anomaly, it is the reflect of abnormal structure underground. Whether gravity anomaly and terrain are correlative should not be regarded as the standard for judging the impact of undulate terrain on gravity anomaly.
Keywords: mount-shape gravity anomaly undulate terrain bouguer anomaly forward model
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