Hydrogeology of Stromboli volcano, Aeolian Islands (Italy) from the interpretation of resistivity tomograms, self-potential, soil temperature and soil CO2 concentration measurements
Hydrogeology of Stromboli volcano, Aeolian Islands (Italy) from the interpretation of resistivity tomograms, self-potential, soil temperature and soil CO2 concentration measurements
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伊奥利亚群岛（意大利）斯特龙博利火山的水文地质，通过电阻率断层图、自电势、土壤温度和土壤二氧化碳浓度测量值的解释
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发表时间：
2011
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通讯作者：
E. T. H. Sun
中科院分区：
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作者：
A. Revil;A. Finizola;T. Ricci;E. Delcher;A. Peltier;S. Barde‐Cabusson;G. Avard;T. Bailly;L. Bennati;S. Byrdina;J. Colonge;F. Gangi;G. Douillet;M. Lupi;J. Letort;E. T. H. Sun
为了更好地了解意大利斯特龙博利火山的水文地质和主要构造断层的位置，我们沿两个剖面收集了电阻率测量值、土壤二氧化碳浓度、温度和自电位测量值。这两处剖面图始于该岛西南部的吉诺斯特拉村。第一个剖面（长 4.8 公里）最终位于火山东北部的斯卡里村，第二个剖面（长 3.5 公里）位于岛东部的 Forgia Vecchia 海滩。这些数据用于提供有关浅层含水层位置和热液系统扩展的见解。这项大规模研究得到了两项高分辨率研究的补充，一项在皮佐地区（靠近活跃喷口），另一项在 Rina Grande，在那里可以观察到侧翼塌陷区域。 Pizzo 相当于热液系统的主要脱气结构之一。主要脱气区域位于对应于 Rina Grande 扇区塌陷滑行面顶部的较高渗透性区域。我们发现自电位数据揭示了斯卡里和圣温琴佐村庄上方含水层的位置。我们根据这些数据对该含水层的深度进行了估计。热液系统的横向延伸（电阻率~15-60 ohm m）比预期的向斯卡里和圣温琴佐村方向延伸要宽（与浅井记录的温度数据一致）。热液系统横向延伸到达岛东部Rina Grande扇区塌陷区的下三分之一。该地区的热液体被古老的塌陷边界所阻挡。热液体的这个位置与先前发表的工作中的低磁化强度值（<2.5 A m−1）一致。 Rina Grande 下方热液体的存在引发了人们对该建筑侧面机械稳定性的疑问。
To gain a better insight of the hydrogeology and the location of the main tectonic faults of Stromboli volcano in Italy, we collected electrical resistivity measurements, soil CO2 concentrations, temperature and self-potential measurements along two profiles. These two profiles started at the village of Ginostra in the southwest part of the island. The first profile (4.8 km in length) ended up at the village of Scari in the north east part of the volcano and the second one (3.5 km in length) at Forgia Vecchia beach, in the eastern part of the island. These data were used to provide insights regarding the position of shallow aquifers and the extension of the hydrothermal system. This large-scale study is complemented by two high-resolution studies, one at the Pizzo area (near the active vents) and one at Rina Grande where flank collapse areas can be observed. The Pizzo corresponds to one of the main degassing structure of the hydrothermal system. The main degassing area is localized along a higher permeability area corresponding to the head of the gliding plane of the Rina Grande sector collapse. We found that the self-potential data reveal the position of an aquifer above the villages of Scari and San Vincenzo. We provide an estimate of the depth of this aquifer from these data. The lateral extension of the hydrothermal system (resistivity ∼15-60 ohm m) is broader than anticipated extending in the direction of the villages of Scari and San Vincenzo (in agreement with temperature data recorded in shallow wells). The lateral extension of the hydrothermal system reaches the lower third of the Rina Grande sector collapse area in the eastern part of the island. The hydrothermal body in this area is blocked by an old collapse boundary. This position of the hydrothermal body is consistent with low values of the magnetization (<2.5 A m−1) from previously published work. The presence of the hydrothermal body below Rina Grande raises questions about the mechanical stability of this flank of the edifice.