Mocho-Choshuenco Volcanic Complex (MCVC) is one of the most hazardous volcanoes in Chile's Southern Volcanic Zone (SVZ). It is located at 40°S 72°W in Los Ríos Region, Chile, where the SVZ coexists with the margin-parallel Liquiñe-Ofqui Fault System (LOFS) and with NW-striking Andean Transverse Faults (ATF). The LOFS is 1200 km-long intra-arc strike-slip fault system located between 38° and 46°S, and partially controls the occurrence, spatial distribution and geometry of major stratovolcanoes. The fault-fracture networks induced by crustal deformation plays an essential role in the generation of pathways, facilitating the transport and emplacement of magmas. Thus, the Chilean Andes provides one of the best natural laboratories in the world to assess the link between tectonics and volcanism. In this study, we provide new structural, kinematic and dynamic insights, which would condition the formation and evolution of the MCVC and laying foundations for future works.

Structural field data was collected and analyzed from regional and local scales. The strain analysis shows heterogeneous deformation. The stress field analysis at a regional scale indicates a strike-slip dominated transpressional regime with N61°E-trending σ1 and N26°W-trending σ3, which is consistent with the actual oblique convergence. Deformation driven by this oblique convergence is partially partitioned, where the margin-parallel component originates the dextral strike-slip in LOFS. Results are consistent with reactivation of preexisting NW-striking faults under the regional stress field, facilitating hydrothermal fluid flow and magma migration, associated with volcanoes, dikes and minor eruptive centers present in the study area. As a final result, we propose a simplified, three-dimensional model for the MCVC's basement, contributing to the understanding of the system and the way in which the different factors interact.

Mocho-Choshuenco 火山群 (MCVC) 是智利南部火山区 (SVZ) 中最危险的火山之一。它位于智利洛斯里奥斯地区 40°S 72°W，在那里 SVZ 与边缘平行的 Liquiñe-Ofqui 断层系统 (LOFS) 和 NW 走向的安第斯横断层 (ATF) 共存。LOFS 是位于 38°和 46°S 之间的 1200 公里长的弧内走滑断层系统，部分控制了主要层状火山的发生、空间分布和几何形状。地壳变形诱发的断层裂隙网络在通道的产生、促进岩浆的运移和侵位中起着至关重要的作用。因此，智利安第斯山脉提供了世界上最好的自然实验室之一，可以评估构造与火山活动之间的联系。在这项研究中，我们提供了新的结构，

从区域和局部尺度收集和分析结构场数据。应变分析显示不均匀变形。区域尺度应力场分析表明，以N61°E向σ1和N26°W向σ3为主的走滑为主的压压状态，与实际斜辐合相一致。由这种倾斜会聚驱动的变形被部分分割，其中边缘平行分量起源于 LOFS 中的右旋走滑。结果与区域应力场下先前存在的 NW 走向断层的重新激活一致，促进了热液流动和岩浆迁移，与研究区域中存在的火山、堤坝和小型喷发中心有关。作为最终结果，我们为 MCVC 的地下室提出了一个简化的三维模型，