The Aulet and Adons diapirs are exposures of Triassic Keuper evaporites in the Ribagorça Basin in the south-central Pyrenees. The diapirs have been alternatively interpreted from mapped structural relationships as either passive salt diapirs or extensional salt rollers. Correspondingly, the associated diapir-flanking minibasins have been interpreted as either salt-withdrawal or extensional-rollover minibasins, respectively. New field mapping, stratigraphic sections, petrographic analysis, correlation diagrams, and drone photography characterize the depositional facies and stratal architecture of the flanking Sopeira, Sant Gervàs, and Faiada minibasins (upper Albian to lower Santonian synrift to postrift strata), which in turn, constrains the origin and evolution of each salt body and associated minibasins.Each minibasin displays unique facies patterns and stratal thicknesses that reflect depositional systems evolving in response to spatially and temporally variable extension, salt evacuation, and passive diapirism during the Pyrenean rift and postrift phases. The Sopeira minibasin developed in the late Albian with significant localized subsidence, but it remains inconclusive if the bounding Aulet diapir originated as a passive diapir or a salt roller. The Llastarri fault zone, previously interpreted as a salt weld, separates the Sopeira minibasin from the primarily extensional Sant Gervàs minibasin, and is reinterpreted here as a remnant salt ridge, as it lacks evidence for passive diapirism. The Sant Gervàs minibasin remained relatively uplifted until the middle to late Cenomanian, along with the Faiada minibasin. Evidence for passive diapirism in the Faiada minibasin, including diapir-derived detritus and composite halokinetic sequences, indicate salt evacuation into the bounding Adons passive diapir.Integration of detailed sedimentologic and stratigraphic analyses with interpretations of basin formation and structural development provides better resolution of the earlier phases of gravity-driven extension and loading-driven salt movement of the Aulet and Adons diapirs; these insights help constrain structural interpretations and reconstructions of Pyrenean shortening and megaflap development in the Ribagorça Basin. Sedimentological and stratigraphic evidence for or against passive diapirism need to be integrated into structural interpretations, especially when precursor salt structures are obscured by subsequent contraction. This well constrained basin framework demonstrates the effects of inherited extensional structures and passive diapirism on Pyrenean shortening and megaflap rotation.

中文翻译：

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从西班牙加泰罗尼亚西班牙比利牛斯山脉侧翼小型盆地地层的沉积学和地层学分析解释 Aulet 和 Adons 底辟的性质

Aulet 和 Adons 底辟是比利牛斯山脉中南部 Ribagorça 盆地三叠纪 Keuper 蒸发岩的出露。底辟也可以从映射的结构关系中被解释为被动盐底辟或伸展盐辊。相应地，相关的底辟侧翼小盆地已分别被解释为盐提取或伸展翻滚小盆地。新的油田测绘、地层剖面、岩相分析、相关图和无人机摄影表征了侧翼的 Sopeira、Sant Gervàs 和 Faiada 小型盆地（上阿尔比阶到下桑托阶同裂谷到后裂谷地层）的沉积相和地层结构，这反过来又，限制了每个盐体和相关小盆地的起源和演化。每个微型盆地都显示出独特的相模式和地层厚度，反映了在比利牛斯裂谷和后裂谷阶段响应空间和时间变化的伸展、盐分疏散和被动底辟作用而演变的沉积系统。Sopeira 小型盆地发育于阿尔比纪晚期，局部沉降明显，但边界 Aulet 底辟是起源于被动底辟还是盐辊尚无定论。Llastarri 断层带，以前被解释为盐焊缝，将 Sopeira 小盆地与主要伸展的 Sant Gervàs 小盆地分开，并在这里被重新解释为残余盐脊，因为它缺乏被动底辟作用的证据。Sant Gervàs 小盆地一直相对隆起，直到 Cenomanian 中晚期，连同 Faiada 小盆地。Faiada 小盆地被动底辟活动的证据，包括底辟衍生的碎屑和复合卤代动力学序列，表明盐分疏散到边界 Adons 被动底辟。将详细的沉积学和地层分析与盆地形成和构造发展的解释相结合，可以更好地解决早期的问题Aulet 和 Adons 底辟的重力驱动延伸和负载驱动的盐运动阶段；这些见解有助于限制对里巴戈萨盆地比利牛斯山脉缩短和巨型襟翼发育的结构解释和重建。需要将支持或反对被动底辟作用的沉积学和地层学证据整合到结构解释中，特别是当前体盐结构被随后的收缩所掩盖时。