Quaternary Mount Nemrut stratovolcano, having a spectacular summit caldera and associated lakes, is located north of the Bitlis–Zagros suture zone, Eastern Turkey. Although much attention has been paid to its geology, morphology, history and biology, a detailed geophysical investigation has not been performed in this special region. Thus, we attempted to characterize the stratovolcano and the surroundings using total field aeromagnetic anomalies. Potential field data processing techniques helped us to interpret geologic sources causing magnetic signatures. Resulting image maps obtained from some linear transformations and a derivative-based technique revealed general compatibility between the aeromagnetic anomalies and the near-surface geology of the study area. Some high amplitude magnetic anomalies observed north of the Nemrut caldera rim are associated with the latest bimodal volcanic activity marked by lava fountains and comenditic-basaltic flows occurred along the rift zone. After minimizing the high-frequency effects, a pseudogravity-based three-dimensional inversion scheme revealed that the shallowest deep-seated sources are located about 3.0 km below the ground surface. Two-dimensional normalized full gradient solutions also exposed the depths of these anomaly sources, in good agreement with the inversion results. This first geophysical study performed through aeromagnetic anomalies clearly gave insights into some main magnetized structures of the Mount Nemrut stratovolcano.

中文翻译：

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通过航空磁异常分析对内姆鲁特山成层火山（土耳其东部比特利斯）进行地球物理调查

第四纪内姆鲁特成层火山位于土耳其东部的比特利斯-扎格罗斯缝合带以北，拥有壮观的山顶火山口和相关湖泊。尽管人们对其地质、形态、历史和生物学等方面给予了极大的关注，但尚未对这一特殊区域进行详细的地球物理调查。因此，我们尝试使用总场气磁异常来表征层状火山和周围环境。势场数据处理技术帮助我们解释了导致磁特征的地质来源。从一些线性变换和基于导数的技术获得的图像地图揭示了航空磁异常与研究区域的近地表地质之间的普遍兼容性。在内姆鲁特火山口边缘以北观察到的一些高振幅磁异常与最近的双峰火山活动有关，以熔岩喷泉和沿裂谷带发生的玄武岩流为标志。在最小化高频效应后，基于伪重力的三维反演方案显示，最浅的深层源位于地表以下约 3.0 公里处。二维归一化全梯度解也暴露了这些异常源的深度，与反演结果非常吻合。第一次通过航空磁异常进行的地球物理研究清楚地揭示了内姆鲁特山成层火山的一些主要磁化结构。