(中南大學 地球科學與信息物理學院，長沙 410083)
摘 要: 利用重力梯度張量具有高精度的特點以及解析信號在確定異常體位置上的優(yōu)勢，將解析信號應用于重力場中，研究重力梯度張量解析信號振幅及其一階導數(shù)的極值位置空間變換規(guī)律，為重力場解析信號邊緣和位置識別提供理論基礎。對模型的正演試算結果表明：使用重力梯度張量的解析信號能準確地判斷地下異常體源的位置情況，有效規(guī)避背景場的影響。
關鍵字: 重力梯度張量；解析信號；正演模擬
（School of Geosciences and Info-Physics, Central South University, Changsha 410083, China）
Abstract:By utilizing the characteristics of high precision of gravity gradient tensor data, the advantage of using the analytic signal method to determine the position of source, and applying analytic signals to gravity field, the extreme value position and the spatial variation rules of analytic signals amplitude of gravity gradient tensor and the its first–order derivative were investigated, and a theoretical basis for identifying edge and position of gravity field analytical signal was provided. The forward trial results show that using analytic signals of gravity gradient tensor can determine the position of the underground abnormal body source accurately, and avoid background field effectively.
Key words: gravity gradient tensor; analytic signal; forward simulation
