Abstract
The Eburnean A-type granitic Djebel Drissa ring complex is part of the 2.08Ga post-collisional Aftout magmatic suites that intruded the 2.22–2.09Ga-old Paleoproterozoic granitoids in the Eglab shield, in West African Craton. It is composed of unfoliated granitoids arranged in near-concentric zones. The zoning is interpreted as resulting from multiple intrusions of continuous magmatic pulses, leading to in situ growth of the complex.New field observations, anisotropy of magnetic susceptibility (AMS), gravimetry and aeromagnetic data suggest that the regional deformation controlled the emplacement of this complex. The sub-circular form of the granitic body and the AMS pattern are consistent with a transtensional tectonic setting along a NW–SE major shear-zone and with an emplacement also related to an associated WNW–ESE extension fault. This well-dated regional deformation corresponds to the last main structural event of the Paleoproterozoic evolution of the Eglab shield.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
