Abstract Cerro Domuyo, in northwestern Neuquen province of Argentina, shows notable geothermal activity, although it is located at a considerable distance from the actual volcanic arc. Many studies have been developed in this area with the aim of investigating its geothermal field. Despite these efforts, the characterization of the dynamic activity in the area is still poorly known. This work shows the results of a network of seismological stations which registered volcano-tectonic, long-period and hybrid events. A large number of volcano-tectonic events concentrated mostly in the Cerro Domuyo geothermal area were detected. These events can be divided into two groups, those occurred at shallow depths below the geothermal area and those at greater depths below the high region of Cerro Domuyo. Shallow events were located around the Manchana Covunco fault and many of them were particularly clustered at its intersection with the Humazo fault. Seismicity in the area shows that these faults are continually active due to, fluid movement, as was evidenced by the hydrothermal manifestation of the Humazo in 2003. Moreover, new studies provide evidence that the Cerro Domuyo is experiencing and important inflation (Lundgren et al. 2018 and Astor et al., 2019) which is promoted by a magmatic body. Deep volcano-tectonic events are probably related to the inflation of the Cerro Domuyo by a magmatic body. Considering the large distance between the actual volcanic arc and the study region, and the high density of shallow volcano-tectonic events, it is highly likely that this magmatic body is increasing the geothermal activity. Additionally, the aeromagnetic anomaly over Cerro Domuyo. Evidence as thin magnetic crust of less than 6 km suggesting. A clear link between the geophysical results and the inflation in Cerro Domuyo. These manifestations are probably reflecting a first stage of geomorphological change in this region.

中文翻译：

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阿根廷内乌肯省西北部多穆约火山中心第一阶段膨胀的地球物理证据

摘要 位于阿根廷内乌肯省西北部的 Cerro Domuyo 显示出显着的地热活动，尽管它与实际的火山弧相距相当远。在该地区开展了许多研究，目的是调查其地热场。尽管做出了这些努力，该地区动态活动的特征仍然知之甚少。这项工作展示了记录火山构造、长周期和混合事件的地震台站网络的结果。检测到大量火山构造事件，主要集中在 Cerro Domuyo 地热区。这些事件可分为两组，发生在地热区以下较浅深度的事件和发生在 Cerro Domuyo 高地以下更深处的事件。浅层事件位于 Manchana Covunco 断层周围，其中许多特别聚集在它与 Humazo 断层的交汇处。该地区的地震活动表明，这些断层由于流体运动而持续活跃，正如 2003 年 Humazo 的热液表现所证明的那样。此外，新的研究提供证据表明 Cerro Domuyo 正在经历重要的膨胀（Lundgren 等人，2003 年）。 2018 和 Astor et al., 2019)，这是由岩浆体推动的。深部火山构造事件可能与岩浆体对 Cerro Domuyo 的膨胀有关。考虑到实际火山弧与研究区距离大，浅层火山构造事件密度高，该岩浆体极有可能增加地热活动。此外，Cerro Domuyo 上空的航磁异常。证据为小于 6 公里的薄磁地壳表明。地球物理结果与 Cerro Domuyo 通货膨胀之间的明确联系。这些表现可能反映了该地区地貌变化的第一阶段。