【摘要】 用波数域的位场转换和快速傅立叶变换理论研究重力归一化总梯度和归一化相位;在波数域向下延拓和导数计算的滤波算子中,分别引入圆滑滤波因子,抑制了向下延拓计算中对噪声干扰的放大作用,增加了计算的稳定性;利用改进的方法,计算并阐述了4种断裂构造GH场等值线和相位曲线的变化特征;别列兹金重力归一化总梯度法中极大值理论在研究断裂构造中具有局限性,对于无限延伸断裂构造,应根据GH场等值线的走向、形状的特点,结合归一化相位曲线的转折点确定断裂空间位置。更多还原

【Abstract】 The normalized full gradient and phase of gravity anomalies have been studied by potential field conversion and fast Fourier transform in wave-number domain. Smoothing filter factors are introduced respectively in downward continuation and derivative computation of potential field, these factors can restrain the amplification effect on noise and increase the stability of calculation. Using the modified method, we have calculated and discussed variation characteristics of the normalized full gradient of gravity anomaly contours and phase curve about four types of faulted structures. At the same time, we indicated the inadaptability of maximal value theory of the full gradient of gravity in researching faulted structure. We can also determine the location of boundless outstretched faulted structures according to the trend and shape of G^H field contours combined with the turning points on gravity phase curves.更多还原