@kau.edu.sa
Faculty of Earth Sciences- Department of Mineral Resources
King Abdulaziz University
Reviewing and summarizing the early ideas on the existence of Mesoproterozoic components in the Arabian-Nubian Shield (ANS). It sheds more light on their significance in crustal evolution of the ANS. Nowadays there is a general agreement among geologists that the late Mesoproterozoic to Cambrian period is one of the most remarkable geological record in Earth’s history. It began with the fragmentation of Rodinia supercontinent (1300 Ma and 900 Ma) and ended by the amalgamation of Gondwana supercontinent.
Uranyl minerals deposits are found filling cavities and as surface encrustations on some crystalline rocks of the Arabian Nubian Shield (ANS). The mineral assemblages include not conclusively uranophane, kasolite, soddyite, boltwoodite, autunite, meta-autunite, liandratite, brannerite, uranopyrochlore, ishikawaite, fergusonite and betafite. Several locations in the ANS were investigated in order to identify the genetic history of these deposits.