Figures index

From

Lead Reservoirs and Metallization in Nigeria: Example of a Contrasting Geological Terrains

Silas Dada, Onema Adojoh, Adisa Rahaman, Ibrahim Garba

Journal of Geosciences and Geomatics. 2015, 3(2), 28-36 doi:10.12691/jgg-3-2-1
  • Figure 1. Pre-drift Proterozoic belts and their Phanerozoic cover rocks between the cratons (Dada 2008)
  • Figure 2a. Major areas of gold mineralization in the schist belts of western half of Nigeria. AFS Anka Fault System, KF Kalangai Fault, IF Ifewara Fault. 1 Maru, 2 Kwali, 3 Anka (Zuzurfa, Kuba), 4 Malele, 5 Bin Yauri, 6 Tsohon Birnin Gwari, 7 Kwaga, 8 Gurmana, 9 Okolom-Dogondaji, 10 Iperindo, after (Garba 2003)
  • Figure 2b. Geological map of Ife-Ilesha schist belt showing the location of Iperindo goldfield (Caby & Boesse 2001).
  • Figure 3. Mesozoic Pb-Zn and related mineralization in the Nigerian Benue Trough, after (Burke et al. 1972)
  • Figure 4a. 207Pb/204Pb vs 206Pb/204Pb of various rocks in Nigeria with the 600 Ma reference isochron
  • Figure 4b. 208Pb/204Pb vs 206Pb/204Pb of various rocks in Nigeria with the average growth curve of Stacey & Kramers, SK (1975)
  • Figure 5a. 207Pb/204Pb vs 206Pb/204Pb of various mineral extracts in Nigeria with the 600 Ma reference isochron
  • Figure 5b. 208Pb/204Pb vs 206Pb/204Pb of various mineral extracts in Nigeria with the average growth curve of Stacey & Kramers, SK (1975)
  • Figure 6. Plot of Pb isotopic composition of various rocks as in Figure 4. in the global geotectonic environments (Zartman & Doe, 1981). A=mantle, B=orogen, C=upper crust, D=lower crust
  • Figure 7. Plot of Pb isotopic composition of mineralisation as in Figure 5 in the global geotectonic environments (Zartman & Doe, 1981). A=mantle, B=orogen, C=upper crust, D=lower crust