The provenance of Middle Jurassic to Cretaceous sediments in the Irish and Celtic Sea Basins: tectonic and environmental controls on sediment sourcing

The Jurassic and Cretaceous sedimentary infill of the Irish Celtic Sea Basins is intimately associated with breakup supercontinent Pangea, opening Atlantic margin. Previous basin studies have constrained tectonism, uplift sediment composition, but provenance routing not received detailed consideration. Current hypotheses for suggest localized sourcing throughout Cretaceous, despite a dynamic tectonic palaeoenvironmental history spanning more than 100 million years. We present detrital zircon, white mica apatite geochronology alongside heavy mineral data from five basins. Findings reveal that derived predominantly distal sources lesser periods local sourcing. deduce tectonically induced marine transgression regression events had first-order control on v. proximal Additionally, tectonism which uplifted Fastnet Basin region during Middle–Late recycled sediments into connected Basins. Detrital evidence support three distinct switches in these Overall an integrated multi-proxy approach provides novel insights to environmental controls as demonstrated Supplementary material : Tables S1–S6 are available at https://doi.org/10.6084/m9.figshare.c.5343657