Journal of
Geology and Mining Research

  • Abbreviation: J. Geol. Min. Res.
  • Language: English
  • ISSN: 2006-9766
  • DOI: 10.5897/JGMR
  • Start Year: 2009
  • Published Articles: 176

Article in Press

Geological mapping and mineralization potentials in polyphase deformed basement rocks, East of Okemesi fold belt, Southwestern Nigeria

Ayodele Olusiji Samuel and Ajigo Isaac Ominyi

  •  Received: 23 March 2020
  •  Accepted: 20 May 2020
The study area covered Ikogosi, Igbara odo, Ipole, Erijiyan and Araromi Ekiti respectively which are underlain by rocks that have undergone several episodes of tectonic deformation and posess other deep seated structures such as fractures, joints, foliations and steep angle dips that are manifestations of the pervasive Pan African orogeny. Geological units of the area consists of migmatites, granites, granite-gneiss, quartzites (massive and schistose types) as well as pegmatites occurring as veins and dykes with varying lengths and sizes. The cross-sectional map of the area confirmed folding episodes which are polyphase in nature, and the type of folds recognized are ptygmatic, asymmetrical, tight, and isoclinal to overturned antiformal folds. Others structures discovered arose from brittle to ductile deformational events. The dominant minerals observed in the slides and photomicrographs produced revealed some rock forming minerals such as quartz, feldspar (microcline, plagioclase and orthoclase), biotite and muscovite and opaque mineral such as iron oxide. However, the studied areas exhibit potentials for gemstones mineralization such as garnets, blue and green tourmalines and other specialty minerals which are hosted by the granite pegmatites in the study areas.

Keywords: Ikogosi; Lithologic Units; Deformation; Gemstones; Exploration