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本文在Pawlowski优选延拓思想的基础上,提出了在深源长波长信息和浅源短波长信息互不相关、延拓高度足够大的前提下,基于优选向上延拓算子的重力异常分离方法与步骤,通过分析理论模型重力异常分离算子的频率响应随不同延拓高度的变化规律,给出了估计最佳延拓高度的办法。利用本文方法对某铁矿区实际重力异常进行处理,有效地分离出了区域异常和局部异常,异常分离效果好。
Based on Pawlowski’s idea of continuation extension, this paper proposes a gravity anomaly separation method based on the preferred upward continuation operator, based on the assumption that the deep-source long-wavelength information and the shallow-source short-wavelength information are irrelevant and the extension height is large enough. And step, the method of estimating the optimal continuation height is given by analyzing the variation of frequency response of gravity anomalous separation operator with different continuation heights in the theoretical model. Using this method to deal with the actual gravity anomalies in a certain iron ore district, regional anomalies and local anomalies are effectively separated and the anomaly separation effect is good.