Geological and geochemical study of the rocks of the volcanic-sedimentary formation in Sheikh Hassan –Al-Asfoura and Umm Al-Tuyour
Abstract
Two geological sections within the work area were implemented and studied (Sheikh Hassan-Al-Asfoura section, and Umm Al-Tuyour section). The Sheikh Hassan-Al-Asfoura section is considered one of the sites where the entire rocks of the volcanic-sedimentary formation can be seen with a total thickness of up to 1000 m, in addition to the richness of the rock formations in this site with manganese ore. While the Umm al-Tuyur site includes an integrated section of the volcanic-sedimentary formation and ophiolitic rocks. Petrographic studies were conducted on rock samples (20 microscopic slides), and the results showed that volcanic-sedimentary rocks are represented by two types: The first type is sedimentary and includes siliceous- claycareous rocks, claycareous -siliceous rocks, radiolarite silicate rocks, calcareous rocks, and calcareous-volcanic rocks. The second style is volcanic and includes diabase rocks, pillow lapa rocks, and volcanic tuff rocks, which are considered the products of subducted alkaline volcanism and are located within the sedimentary style. The results confirmed the consistency of the two field and laboratory studies. The results of geochemical analyzes of /10/ rock samples confirmed the presence of the studied igneous and sedimentary petrographic types.
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