Fold-and-thrust belts developed above an evaporite décollement host structural traps where geofluids, including hydrocarbons, can accumulate. A valid and accurate structural style intepretation is therefore crucial to understand the three-dimensional geometries in the subsurface, in order to better model geofluid reservoirs and to increase success during exploration. Here, we present a multidisciplinary approach to unravel the subsurface structural styles of the Jura fold-and-thrust belt (eastern France), combining geological mapping, from regional to outcrop scale, with cross-section balancing and 2D-kinematic forward modelling. Results show that the Jura fold-and-thrust belt is characterized by mixed structural styles. Evaporite-cored folds are similar to those commonly observed in fold-and-thrust belt characterized by a thick salt-bearing basal detachment (e.g. Zagros fold-and-thrust belt), while fault-bend fold geometries and the emplacement of thrust sheets are similar to those occurring in fold-and-thrust belts characterized by multiple and thin detachment horizons within the sedimentary sequence (i.e. Canadian Rocky Mountains). In the Jura, the flow of evaporites in most cases is inhibited, as anhydrites and salt form thin layers and are mixed with mechanically stronger rocks, such as marls and dolostones. Results from this study can be used as a benchmark to compare structural styles within other fold-and-thrust belts characterized by lithological variation within the evaporite-bearing basal detachment at the regional scale and by multiple detachment layers within the sedimentary sequence.

褶皱冲断带在蒸发岩崩塌层上方发育，其中包含包括碳氢化合物在内的地质流体可以积聚的构造圈闭。因此，有效和准确的结构类型解释对于了解地下的三维几何形状至关重要，以便更好地模拟地质流体储层并提高勘探的成功率。在这里，我们提出了一种多学科方法来揭示侏罗山褶皱冲断带（法国东部）的地下结构样式，结合地质图，从区域到露头尺度，以及横截面平衡和二维运动学正演建模。结果表明，侏罗山褶皱冲断带具有混合构造样式。蒸发岩芯褶皱与褶皱冲断带中常见的褶皱相似，以厚的含盐基底拆离（如扎格罗斯褶皱冲断带）为特征，而断层弯曲褶皱的几何形状和冲断层的就位是类似于褶皱冲断带中的沉积层序（即加拿大落基山脉），其特征是具有多个和薄的拆离层位。在侏罗山，蒸发岩的流动在大多数情况下受到抑制，因为硬石膏和盐形成薄层并与机械强度较高的岩石（如泥灰岩和白云岩）混合。