Abstract The El Tigre fault provides a significant example of Pliocene-Quaternary tectonic activity at the West of Precordillera, receiving considerable attention in the last years. However, longitudinal thrusts of the nearest Sierra del Tigre and a minor piedmont deformation belt identified in its western piedmont are still poorly understood. The present work comprised a detailed map of the geomorphological features of tectonic origin and Quaternary alluvial fan terraces located between the Sierra del Tigre and the El Tigre fault. Several topographic and geoelectrical profiles across minor fault and fold scarps were surveyed to define the displacement scarps, the geological structure geometries at subsurface and their relationship with main structures. Geoelectrical models allowed us to recognize three geoelectrical levels: A (> 200–300 Ω.m) correlated to Pleistocene alluvial fan terraces Q4 and Q3; B (ranging from 50 to 300/450 Ω.m), under level A and correlated to the Neogene substratum (Rodeo Formation); C (

中文翻译：

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第四纪陡坡的地下特征及其与阿根廷圣胡安 Precordillera 西缘主要构造的可能联系

摘要 El Tigre 断层提供了 Precordillera 西部上新世-第四纪构造活动的一个重要例子，在过去几年中受到了相当大的关注。然而，最近的 Sierra del Tigre 的纵向逆冲推力和在其西部山麓中确定的一个小山麓变形带仍然知之甚少。目前的工作包括构造起源地貌特征的详细地图，以及位于 Sierra del Tigre 和 El Tigre 断层之间的第四纪冲积扇阶地。对跨越小断层和褶皱陡坡的几个地形和地电剖面进行了调查，以确定位移陡坡、地下地质构造几何形状及其与主要构造的关系。地电模型使我们能够识别三个地电水平：A (> 200–300 Ω. m) 与更新世冲积扇阶地 Q4 和 Q3 相关；B（范围从 50 到 300/450 Ω.m），在 A 层之下，与新近纪地层（罗迪欧地层）相关；C （