Aeromagnetic constraints on the structural framework of umm farwah fault system and associated neoproterozoic accretion domains of the asir terrane; the biljurshi area, arabian shield

Abstract

The Arabian Shield and the Pan-African shear zones/terrane boundaries are marked by widespread occurrence of juvenile Neoproterozoic assembly arc terranes. Deep sealed architecture and tectonic framework are still poorly understood because the lack of geophysical studies. N-S oriented lineaments and associated structures that characterize the Asir terrane have crucial interests because they represent the primary constraints to understand structuring and kinematics of the Arabian Shield. The integration of aeromagnetic and geological data of the Biljurshi area highlights the structural setting and its relationship with the Precambrian volcanosedimentary, metamorphic and plutonic rocks. Results contribute to understand the deep structure of the syn-accretion sedimentary and volcanic system. The geophysical data validate and improve the current geological settings and determine the geometry and tectonic deformation of the Biljurshi subsurface structures. The obtained geometry and structural models will be used to highlight the deep architecture of the Biljurshi area within the Arabian Shield.