Structural Restoration of Cretaceous Inversion Events in the Bjørnøyrenna Fault Complex, Western Barents Shelf

Abstract Inversion structures including folds, reverse faults are observed along the Bjørnøyrenna Fault Complex in western Barents Sea, although fault complex is extensional origin and developed mid-Jurassic to Early Cretaceous. Subsidence was interrupted Cretaceous (Valanginian early Barremian) because of syn-rift localized tectonic inversion, itself related uplift Loppa High. The inversion caused dextral transpression boundary adjacent second phase interpreted be Late (mid-Cenomanian) age, coeval deposition Kolmule Formation Complex. later compression regional significance NW‒SE directed far field stresses which head-on study area. aim present identify decipher eventual by means structural restoration. To these aims, 2D MOVE TM , modeling analysis software Midland Valley Exploration Ltd (Glasgow, Scotland), used three key seismic lines crossing central northern segments restored. Key profiles 1 2 reveal null point positions at base (Hekkingen Formation). Null show progressive compressional deposits (Knurr Below above points geometries restored normal faulting respectively. results confirm Lower triggered sections also positive features associated with folding hanging wall Upper (Kolmule reconstruction amount eroded material on footwall block suggests In profile 3 up Formation) due corresponding section shows a anticline both events.