2025/10/02 by Pablo Santolaria, Roi Silva-Casal, Núria Carrera +3 · 1 voice
Earth and Planetary Sciences · Arts and Humanities · #Geological and Geophysical Studies Worldwide #Archaeological and Historical Studies #Archaeological and Geological Studies
paper · pdf · doi:10.5194/se-16-899-2025
openalex publication_date 2025/10/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Abstract. At the northwestern termination of the South Pyrenean Central Salient, thrust imbrication, detachment folding and diapirism are structurally and genetically related. The La Fueba imbricate system has been folded by the Mediano detachment anticline, while this fold connects with the Clamosa diapir. Together, this structural-stratigraphic trinity provides an excellent example to evaluate the factors controlling purely contractional diapirs in onshore-offshore contractional fold-thrust systems. Our study integrates detailed geological mapping, a large structural dataset, new biostratigraphic data, and interpretations of well-tied depth-converted seismic lines and cross-sections. A combined evolutionary model for contractional diapirs formation and evolution is presented. While less common than in extensional settings, the interplay of shortening of a salt horizon along with vertical axis rotations and local stretching and erosion of the overburden can lead to purely contractional salt diapirs.