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Aeromagnetic data interpretation to locate buried faults in Riyadh Region, Saudi Arabia

机译：航磁数据解释以定位沙特阿拉伯利雅得地区的地下断层

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High resolution aeromagnetic data and various filtered maps are used in the present study to detect buried faults in the Riyadh region, Saudi Arabia. Filtering techniques such as Butterworth filter, tilt derivative, source edge detection (SED) and Euler deconvolution (ED) were used to map the structural lineaments in the study area. In this respect, the interpretation of the magnetic anomaly maps indicates that the area is dissected by a number of deep-seated faults that aligned mainly alongNNW, NNE. The NW, NE, WNW and EWtrending faults are present as second order. These faultsdivided the study area into three main zones of variable depth, width and pattern. To the northwest, there is an elongated high magnetic anomaly that indicates possible basement uplift, where a wide low magnetic anomaly dominates the western side of the area, with three local and circular low magnetic anomalies. This anomaly pattern is interpreted as a large and regional basinal area with three local depocenters seperated by structural uplifts. The southwestern corner of the area is characterized by a general shallow basement structure with local low magnetic anomalies that form the Awsat and Nisah grabens. The edges of the interpreted structural zones are delineated clearly using SED techniques and the average depth to the magnetic sources ranged from ~5300 m to ~ 1300 m.
机译：本研究使用高分辨率的航空磁数据和各种滤波的地图来检测沙特阿拉伯利雅得地区的地下断层。使用诸如Butterworth滤波器，倾斜导数，源边缘检测（SED）和Euler反卷积（ED）之类的滤波技术来绘制研究区域的结构轮廓。在这方面，对磁异常图的解释表明该区域被许多深部断层剖开，这些断层主要沿着ＮＮＷ，ＮＮＥ排列。 NW，NE，WNW和EWtrending故障以二阶形式出现。这些断层将研究区域分为深度，宽度和样式可变的三个主要区域。在西北部，有一个细长的高磁异常，表明可能发生了基底隆升，该区域的西侧是一个广泛的低磁异常，其中三个局部和圆形的低磁异常。这种异常模式被解释为一个大的区域流域，三个局部沉积中心被结构隆起分开。该区域的西南角的特征是一般的浅地下室结构，局部低磁异常形成了Awsat和Nisah ens。使用SED技术可以清晰地描绘出解释的结构区域的边缘，并且到磁源的平均深度范围为〜5300 m至〜1300 m。

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