| 利用重力归一化总梯度及相位法研究断裂构造 |
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| 引用本文： | 张凤琴,张凤旭,刘财,孟令顺,马淑颜,林泽付.利用重力归一化总梯度及相位法研究断裂构造[J].吉林大学学报(地球科学版),2005,35(1):123-127. |
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| 作者姓名： | 张凤琴 张凤旭 刘财 孟令顺 马淑颜 林泽付 |
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| 作者单位： | 吉林大学,地球探测科学与技术学院,吉林,长春,130026;黑龙江地质调查总院,哈尔滨分院,黑龙江,哈尔滨,150080 |
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| 基金项目： | 沈阳地质矿产研究所项目 |
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| 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.
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| 关 键 词： | 波数域 重力归一化总梯度 重力归一化相位 圆滑滤波因子 |
| 文章编号： | 1671-5888(2005)01-0123-05 |
| 修稿时间： | 2004年2月25日 |
Study of Faulted Structure Using the Normalized Full Gradient of Gravity Anomaly and Its Phase |
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| ZHANG Feng-qin,ZHANG Feng-xu,LIU Cai,MENG Ling-shun,MA Shu-yan,LIN Ze-fu.Study of Faulted Structure Using the Normalized Full Gradient of Gravity Anomaly and Its Phase[J].Journal of Jilin Unviersity:Earth Science Edition,2005,35(1):123-127. |
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| Authors: | ZHANG Feng-qin ZHANG Feng-xu LIU Cai MENG Ling-shun MA Shu-yan LIN Ze-fu |
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| 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. |
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| Keywords: | wave-number domain normalized full gradient of gravity anomalies gravity phase smoothing filter factor |
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