The post-orogenic evolution of the European Variscan basement remains difficult to constrain due to the absence of post-orogenic sedimentary records. One of the current ways to access this history is to constrain the thermal evolution of these basement areas through indirect methods such as low-temperature thermochronology (LTT) thermal modelling. In this study, apatite fission-track (AFT) data have been acquired for the north-eastern part (Vendée and Limousin) of the French Massif Central Variscan basement. Similar thermal inversion procedure has been done, assuming that some samples were close to the surface during Triassic times. The results show a complex post-Variscan evolution of the western part of the Massif Central. Inversion of the AFT data indicates a high-temperature event during the Jurassic period. This thermal event can be interpreted as the deposition of a significant sedimentary cover which has been later eroded during the Late Jurassic and/or Early Cretaceous. Interpretation of the thermal models implies the presence of the sampled rocks close to the surface during Cretaceous and Eocene times. The estimated volume of this eroded sedimentary cover suggests a probable larger extension of the surrounding sedimentary basins (Paris Basin and Aquitaine Basin) across the Variscan basement area.

由于缺乏造山后的沉积记录，欧洲瓦里斯坎地下室的造山后演化仍然很难受到约束。访问此历史记录的当前方法之一是通过间接方法（例如低温热年代学（LTT）热建模）来限制这些地下室区域的热演化。在这项研究中，获得了法国地块中部瓦里斯卡纳地下室东北部（旺代和利穆赞）的磷灰石裂变径迹（AFT）数据。假设在三叠纪时期一些样品靠近地表，也进行了类似的热转化过程。结果表明，地块中部西部地区发生了复杂的后瓦里斯卡纳演化。AFT数据反演表明在侏罗纪期间发生了高温事件。这种热事件可以解释为大量沉积盖层的沉积，后来在侏罗纪晚期和/或白垩纪早期被侵蚀。热模型的解释意味着在白垩纪和始新世时期，靠近表面的采样岩石的存在。据估计，受侵蚀的沉积覆盖层的体积表明，整个瓦里斯坎基底区域周围的沉积盆地（巴黎盆地和阿基坦盆地）可能有较大的扩展。