Magnetic Anomalies and Low Ground Resistivity as Possible Indicators of Active Fault Location
Magnetic Anomalies and Low Ground Resistivity as Possible Indicators of Active Fault Location
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磁异常和低地电阻率作为活动故障定位的可能指标
DOI：
10.5636/jgg.37.169
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
Hidefumi Tanaka
中科院分区：
文献类型：
--
作者：
Y. Honkura;A. M. Işikara;D. Kolcak;N. Orbay;S. Sipahioglu;N. Ohshiman;Hidefumi Tanaka
针对北安纳托利亚断裂带西段可能存在的地震空区，在伊兹尼克-梅克切地区进行了电磁观测，主要目的是寻找活动断裂的位置，揭示与之相关的异常构造，以供参考。我们还在伊斯梅特帕萨地区进行了类似的观测，那里在1944年发生了7.6级地震，断层线是众所周知的。观测的初步结果总结如下：在大多数情况下，磁异常都是沿沿着断层线发现的，断层线附近地电阻率有变低的趋势。两个观测区的这些异常特征的比较表明，在Iznik-Mekece地区发现的活动断层与Ismetpasa地区的断层相似。因此，Iznik-Mekece地区的断层可能是未来地震空区发震的候选断层之一。
In view of a possible seismic gap in the western part of the North Anatolian Fault Zone, we carried out electric and magnetic observations in the Iznik-Mekece area, aiming primarily at searching for location of an active fault and disclosing an anomalous structure associated with it. For reference, we also made similar observations at the Ismetpasa area where an earthquake of magnitude 7.6 took place in 1944 and fault lines are well known. The preliminary results of observations are summarized as follows: in most cases, magnetic anomalies are found along fault lines, and the ground resistivity tends to be lower near fault lines. Comparison of these anomalous features in both the observation areas indicates that the active fault found in the Iznik-Mekece area is similar to the fault in the Ismetpasa area. It is suggested, therefore, that the fault in the Iznik-Mekece area may be one of the candidates for future earthquake generation in the seismic gap region.