The Maures–Tanneron Massif and the Corsica–Sardinia Block are two segments of the southern European Variscan belt that separated during the Late Oligocene–Miocene due to the opening of the Western Mediterranean basin. Correlation between the two regions, based mainly on petrologic similarities, is still debated. However, there are no detailed structural and petrochronological constraints on their potential relationships. In northern Sardinia there is well-documented evidence for a dextral transpressive shear zone that initiated after the first stage of frontal collision. In the Maures–Tanneron Massif, despite recognition of an important episode of transpressive deformation, it is still unclear which structures were active during this tectonic regime. We investigate in detail the kinematic of flow, finite strain and the timing of the deformation of the Cavalaire “Fault” (CF), a major ductile shear zone in the Maures–Tanneron Massif. In contrast to previous models, we argue that the CF is a transpressive shear zone characterized by a prevalent component of pure shear, while in-situ monazite geochronology reveals that the CF is initiated at ~ 323 Ma. The new data presented here, based on a multidisciplinary approach document, for the first time, the vorticity of the flow, finite strain and timing of this sector of the East Variscan Shear Zone, a regional-scale shear zone that characterized the Southern European Variscan belt during the late Carboniferous.

Maures-Tanneron地块和Corsica-Sardinia地块是南欧瓦里斯卡纳带的两个部分，由于西地中海盆地的开放，在晚渐新世-中新世时期分离。主要基于岩石学相似性的两个地区之间的相关性仍在争论中。但是，它们之间的潜在关系没有详细的结构和岩石年代学约束。在撒丁岛北部，有充分的证据证明在正面碰撞的第一阶段后开始的右旋超压剪切带。在莫里斯-坦能隆地块，尽管认识到重要的超压变形事件，但仍不清楚在该构造时期中哪些构造活跃。我们将详细研究流动的运动学，有限应变和Caureaire“断层”（CF）的变形时间，CF是莫里斯-坦能隆地块的主要延性剪切带。与以前的模型相比，我们认为CF是一个超压剪切带，其特征是纯剪切的普遍成分，而原位独居石年代学揭示CF起始于〜323 Ma。在此基于多学科方法文档提供的新数据首次显示了东瓦里斯安剪切带这一区域的剪切带的流动涡度，有限应变和时机，这是南欧瓦里斯坎的典型区域尺度剪切带。在石炭纪晚期。我们认为CF是一个超压剪切带，其特征是纯剪切的普遍成分，而原位独居石年代学揭示CF始于323 Ma。在此基于多学科方法文档提供的新数据首次显示了东瓦里斯安剪切带这一区域的剪切带的流动涡度，有限应变和时机，这是南欧瓦里斯坎的典型区域尺度剪切带。在石炭纪晚期。我们认为CF是一个超压剪切带，其特征是纯剪切的普遍成分，而原位独居石年代学揭示CF始于323 Ma。在此基于多学科方法文档提供的新数据首次显示了东瓦里斯安剪切带这一区域的剪切带的流动涡度，有限应变和时机，这是南欧瓦里斯坎的典型区域尺度剪切带。于石炭纪晚期。